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C# custom extension methods


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Here is the namespace called CustomMethod with the class called Extensions. It's to add additional functionality to the likes of in-built datatypes such as string. Use the same way as you would when calling the likes of "myString".ToUpper() or 'c'.ToString() etc...

/*
* Created by guinness
* User: guinness
* Date: 05/04/2014
*/

using System;
using System.Text.RegularExpressions;

namespace CustomMethod
{
    public static class Extensions // Create a custom class for extension methods.
    {
        /// <summary>
        /// Checks whether a character is a digit from 0-9.
        /// </summary>
        /// <param name="c">A character value.</param>
        /// <returns>True or False</returns>
        public static bool IsDigit(this char c)
        {
            return (c >= '0' && c <= '9');
        }

        /// <summary>
        /// Checks whether a string is a digits from 0-9.
        /// </summary>
        /// <param name="i">A string value.</param>
        /// <returns>True or False</returns>
        public static bool IsDigit(this string i)
        {
            foreach (char value in i)
            {
                if (value < '0' || value > '9')
                    return false;
            }
            return true;
        }

        /// <summary>
        /// Checks whether a double is an even value.
        /// </summary>
        /// <param name="d">A double value.</param>
        /// <returns>True or False</returns>
        public static bool IsEven(this double d)
        {
            return Math.Round(d) % 2 == 0;
        }

        /// <summary>
        /// Checks whether an integer is an even value.
        /// </summary>
        /// <param name="i">An integer value.</param>
        /// <returns>True or False</returns>
        public static bool IsEven(this int i)
        {
            return i % 2 == 0;
        }

        /// <summary>
        /// Checks whether a character is a hexadecimal value from 0-9 and A-F.
        /// </summary>
        /// <param name="c">A character value.</param>
        /// <returns>True or False</returns>
        public static bool IsHex(this char c)
        {
            return (c >= '0' && c <= '9' ||
                c >= 'A' && c <= 'F' ||
                c >= 'a' && c <= 'f');
        }

        /// <summary>
        /// Checks whether a string is a hexadecimal value from 0-9 and A-F.
        /// </summary>
        /// <param name="s">A string value.</param>
        /// <returns>True or False</returns>
        public static bool IsHex(this string s)
        {
            foreach (char value in s)
            {
                if (value < '0' || value > '9' &&
                    value < 'A' || value > 'F' &&
                    value < 'a' || value > 'f')
                    return false;
            }
            return true;
        }

        /// <summary>
        /// Checks if a double is an odd value.
        /// </summary>
        /// <param name="d">A double value.</param>
        /// <returns>True or False</returns>
        public static bool IsOdd(this double d)
        {
            return Math.Round(d) % 2 == 1;
        }

        /// <summary>
        /// Checks if an integer is an odd value.
        /// </summary>
        /// <param name="i">An integer value.</param>
        /// <returns>True or False</returns>
        public static bool IsOdd(this int i)
        {
            return i % 2 == 1;
        }

        /// <summary>
        /// Checks whether a string is a palindrome.
        /// </summary>
        /// <param name="s">A string value.</param>
        /// <returns>True or False</returns>
        public static bool IsPalindrome(this string s)
        {
            s = Regex.Replace(s, @"\W", "").ToLower(); // Remove all non-word characters and convert to lowercase.
            char[] c = s.ToCharArray();
            Array.Reverse(c);
            return new string(c) == s;
        }

        /// <summary>
        /// Checks if a byte value is true when non-zero. (Like in most languages.)
        /// </summary>
        /// <param name="b">A byte value.</param>
        /// <returns>True or False</returns>
        public static bool IsTrue(this byte b)
        {
            return b != 0;
        }

        /// <summary>
        /// Checks if a double value is true when non-zero. (Like in most languages.)
        /// </summary>
        /// <param name="d">A double value.</param>
        /// <returns>True or False</returns>
        public static bool IsTrue(this double d)
        {
            return d != 0;
        }

        /// <summary>
        /// Checks if an integer value is true when non-zero. (Like in most languages.)
        /// </summary>
        /// <param name="i">An integer value.</param>
        /// <returns>True or False</returns>
        public static bool IsTrue(this int i)
        {
            return i != 0;
        }

        /// <summary>
        /// Checks if a string is true when the value is not empty. (Like in most languages.)
        /// </summary>
        /// <param name="s">A string value.</param>
        /// <returns>True or False</returns>
        public static bool IsTrue(this string s)
        {
            return s.Length != 0;
        }

        /// <summary>
        /// Repeat a character a certain number of times.
        /// </summary>
        /// <param name="c">A character value.</param>
        /// <param name="count">Number of times to repeat the character.</param>
        /// <returns>Repeated character.</returns>
        public static string Repeat(this char c, int count)
        {
            return (count < 0) ? c.ToString() : new string(c, count);
        }

        /// <summary>
        /// Repeat a string a certain number of times.
        /// </summary>
        /// <param name="s">A string value.</param>
        /// <param name="count">Number of times to repeat the string.</param>
        /// <returns>Repeated string.</returns>
        public static string Repeat(this string s, int count) // Idea taken from AutoIt _StringRepeat()
        {
            if (count < 0 || s.Length < 1) // Check the string length is greater than 1 and the repeat count is valid. Zero is considered valid.
                return s;

            return string.Join(s, new string[count + 1]); // http://rosettacode.org/wiki/Repeat_a_string#C.23
        }

        /// <summary>
        /// Reverse a string.
        /// </summary>
        /// <param name="s">A string value.</param>
        /// <returns>Reversed string.</returns>
        public static string Reverse(this string s)
        {
            char[] c = s.ToCharArray();
            int i = 0, j = c.Length - 1;
            while (i < j) // This version is a slightly optimised version than Array.Reverse().
            {
                char temp = c[i];
                c[i++] = c[j];
                c[j--] = temp;
            }
            return new string(c);

            /*
            char[] c = s.ToCharArray();
            Array.Reverse(c);
            return new string(c);
            */
        }

        /// <summary>
        /// Convert an integer to a hexadecimal representation.
        /// </summary>
        /// <param name="i">An integer value.</param>
        /// <param name="isLowerCase">Is the representation lowercase (true) or uppercase (false).</param>
        /// <returns>Hexadecimal string.</returns>
        public static string ToHexString(this int i, bool isLowerCase = true) // Convert an integer to a hex string representation.
        {
            return i.ToString((isLowerCase) ? "x" : "X");
        }

        private static string ToLowerFast(this string s) // (Faster) convert a string to lowercase characters. Access the same way as .ToLower().
        {
            string lowerString = string.Empty;
            foreach (char value in s)
            {
                lowerString += (char)((value >= 'A' && value <= 'Z') ? (value + 32) : value); // Cast as a char.
            }
            return lowerString;
        }

        private static string ToUpperFast(this string s) // (Faster) convert a string to uppercase characters. Access the same way as .ToUpper().
        {
            string upperString = string.Empty;
            foreach (char value in s)
            {
                upperString += (char)((value >= 'a' && value <= 'z') ? (value - 32) : value); // Cast as a char.
            }
            return upperString;
        }
    }
}

Note: Improved version found >here.

Edited by guinness

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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Example:

/*
* Created by guinness
* User: guinness
* Date: 15/03/2014
* Time: 11:42
* 
*/
using System;
using CustomMethod;

namespace Example
{
    internal class Program
    {
        public static void Main()
        {
            Console.WriteLine("Reversed string: {0}", "reverse".Reverse());
            
            Console.WriteLine("Repeated string: {0}", "s".Repeat(20));
            
            Console.WriteLine("Is Odd: {0}", 100.IsOdd()); // Is the number odd?
            Console.WriteLine("Is Odd: {0}", 99.IsOdd()); // Is the number odd?
            Console.WriteLine("Is Even: {0}", 99.IsEven()); // Is the number even?
            
            Console.WriteLine("To Hex string: {0}", 255.ToHexString(false));
            
            Console.WriteLine("Is char digit: {0}", 'F'.IsDigit());
            
            Console.WriteLine("Is Hex: {0}", "FF00FF".IsHex());
            
            Console.Write("Press any key to continue . . . ");
            Console.ReadKey(true);
        }
    }
}
Edited by guinness

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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True, not to mention I am missing XML comments.

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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Updated with XML comments. Suggestions or just pointing out a blatant disregard for standards and practices is much appreciated too.

 

By the way it might be overkill but have you checked out this? >> http://zextensionmethods.codeplex.com/

Edited by guinness

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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  • 3 weeks later...

Updated the code in the first post with a couple of additions such as IsTrue() and IsPalindrome().

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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public static bool IsDigit(this char c)
{
        return (c >= '0' && c <= '9');
}

I don't use C# so I don't know.  C# being a strongly typed language, are the ASCII values compared in this case?

According to wikipedia at least, "C# disallows this "integer meaning true or false" approach, on the grounds that forcing programmers to use expressions that return exactly bool can prevent certain types of programming mistakes common in C or C++ such as if (a = b) (use of assignment = instead of equality ==)".

So your IsTrue methods may be anti-patterns. 

I'm no expert so, meh.

Edited by jaberwacky
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The char type in this instance is compared by its numerical value. So if c = '1' then it's saying 49 >= 48 AND 49 <= 57. Understand?

The IsTrue() extensions are only there as proof of concept.

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Updated: 22/04/2018

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Why not just Char.IsDigit©?

Also, does your IsOdd function work with negatives? I haven't tried and different languages have different meaning of mod, but a more universal way to tell if a number is odd is to use N % 2 != 0, as -3 % 2 might be 1 or -1 depending on the implementation.

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Why not just Char.IsDigit©?

Also, does your IsOdd function work with negatives? I haven't tried and different languages have different meaning of mod, but a more universal way to tell if a number is odd is to use N % 2 != 0, as -3 % 2 might be 1 or -1 depending on the implementation.

I could have used IsDigit, but was just loosing the call overhead.

IsOdd() didn't work with negative values, but now it does. Thanks.

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Updated: 22/04/2018

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  • 9 months later...

A new version. I also added methods which resemble those found in the String Management section e.g. TrimLeft and TrimRight etc...

#region Required project assemblies

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text.RegularExpressions;

#endregion

/*
* Created by guinness
* User: guinness
* Date: 11/01/2015
*/

namespace ExtensionMethods
{
    // The following links were used to aid in the creation of these extension methods:
    // http://extensionoverflow.codeplex.com/SourceControl/latest#ExtensionMethods/
    // http://blog.sortedbits.com/string-extension-methods-for-c-2/
    // http://extensionmethod.net/csharp/string
    // https://www.autoitscript.com/autoit3/docs/functions/String%20Management.htm


#pragma warning disable 1591
    public enum Cipher : byte
    {
        Rot1,
        Rot2,
        Rot3,
        Rot4,
        Rot5,
        Rot6,
        Rot7,
        Rot8,
        Rot9,
        Rot10,
        Rot11,
        Rot12,
        Rot13,
        Rot14,
        Rot15,
        Rot16,
        Rot17,
        Rot18,
        Rot19,
        Rot20,
        Rot21,
        Rot22,
        Rot23,
        Rot24,
        Rot25
    }
#pragma warning restore 1591

    /// <summary>
    ///     ISBN related flags.
    /// </summary>
    public enum ISBN : byte
    {
        /// <summary>
        ///     10-digit ISBN.
        /// </summary>
        Ten,
        /// <summary>
        ///     13-digit ISBN.
        /// </summary>
        Thirteen
    }

    /// <summary>
    ///     Flags related to between.
    /// </summary>
    public enum StringBetween : byte
    {
        /// <summary>
        ///     The end string at the end of a match starts the next possible match.
        /// </summary>
        None = 0,

        /// <summary>
        ///     A further instance of the start starts the next match.
        /// </summary>
        EndIsStart = 1
    }

    /// <summary>
    ///     Flags related to stripping white space.
    /// </summary>
    [Flags] // http://hugoware.net/blog/enums-flags-and-csharp
    public enum StringStripWS : byte
    {
        /// <summary>
        ///     Strip leading white space
        /// </summary>
        Leading = 1 << 0,

        /// <summary>
        ///     Strip trailing white space
        /// </summary>
        Trailing = 1 << 1,

        /// <summary>
        ///     Strip double (or more) spaces between words
        /// </summary>
        Spaces = 1 << 2,

        /// <summary>
        ///     Strip all spaces (over-rides all other flags)
        /// </summary>
        All = 1 << 3
    }

    /// <summary>
    ///     Extension methods related to System.Object.
    /// </summary>
    public static class ObjectIs
    {
        /// <summary>
        ///     Checks if an object is not null.
        /// </summary>
        /// <param name="value">A object to check.</param>
        /// <returns>true if object was not null; otherwise, false.</returns>
        public static bool IsNotNull(this object value)
        {
            return value != null;
        }

        /// <summary>
        ///     Checks if an object is null.
        /// </summary>
        /// <param name="value">A object to check.</param>
        /// <returns>true if object was null; otherwise, false.</returns>
        public static bool IsNull(this object value)
        {
            return value == null;
        }
    }

    /// <summary>
    ///     Methods related to string conversion and manipulation.
    /// </summary>
    public static class StringConvert
    {
        /// <summary>
        ///     Prefixes all line-feed characters ( (char)10 ) with a carriage return character ( (char)13 ).
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>
        ///     The string with all instances of line-feed characters ( (char)10 ) prefixed with a carriage return character
        ///     ( (char)13 ).
        /// </returns>
        public static string AddCR(this string value)
        {
            return String.IsNullOrEmpty(value) ? String.Empty : new Regex("\n(?<!\r)").Replace(value, "\r\n");
        }

        /// <summary>
        ///     Prefixes all carriage return characters ( (char)13 ) with a line-feed character ( (char)10 ).
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>
        ///     The string with all instances of carriage return characters ( (char)13 ) prefixed with a line-feed character
        ///     ( (char)10 ).
        /// </returns>
        public static string AddLF(this string value)
        {
            return String.IsNullOrEmpty(value) ? String.Empty : new Regex("\r(?!\n)").Replace(value, "\r\n");
        }

        /// <summary>
        ///     Find strings between two string delimiters.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="start">The beginning of the string to find. Passing an empty or null string starts at the beginning.</param>
        /// <param name="end">
        ///     The end of the string to find. Passing an empty or null string searches from start to end of the
        ///     string.
        /// </param>
        /// <param name="mode">Search mode</param>
        /// <param name="isCaseSensitive">Is casesensitive matching</param>
        /// <returns>A string list collection. If no matches, then the count is zero.</returns>
        public static List<string> Between(this string value, string start, string end,
            StringBetween mode = StringBetween.None, bool isCaseSensitive = false)
        {
            end = String.IsNullOrEmpty(end)
                ? @"\z"
                : String.Format(mode == StringBetween.None ? "{0}" : "(?={0})", Regex.Escape(end));
            start = String.IsNullOrEmpty(start) ? @"\A" : Regex.Escape(start);

            var matches = Regex.Matches(value,
                String.Format(@"(?{0}s){1}(.*?){2}", isCaseSensitive ? "" : "i", start, end));

            var list = new List<string>();
            for (int i = 0; i < matches.Count; i++)
            {
                list.Add(matches[i].Groups[1].Value);
            }
            return list;
        }

        /// <summary>
        ///     Compact a string to a certain number of characters left and right.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <param name="countLeftAndRight">Number of characters left and right.</param>
        /// <returns>Compacted string; otherwise, an empty string.</returns>
        public static string Compact(this string value, int countLeftAndRight)
        {
            if (String.IsNullOrEmpty(value) || countLeftAndRight <= 0)
            {
                return String.Empty;
            }

            return value.Length > countLeftAndRight * 2
                ? String.Format("{0}...{1}", value.Substring(0, countLeftAndRight),
                    value.Substring(value.Length - countLeftAndRight, countLeftAndRight))
                : value;
        }

        /// <summary>
        ///     Checks if a string contains a given substring.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="search">The string to seek.</param>
        /// <param name="comparison">Flag related to comparison.</param>
        /// <param name="occurrence">
        ///     Which occurrence of the substring to find in the string. Use a negative occurrence to search
        ///     from the right side. The default value is 1 (finds first occurrence).
        /// </param>
        /// <returns></returns>
        public static int InStr(this string value, string search,
            StringComparison comparison = StringComparison.OrdinalIgnoreCase, int occurrence = 1)
        // Based on AutoIt's StringInStr().
        {
            const int error = -1;
            if (String.IsNullOrEmpty(value) || String.IsNullOrEmpty(search) || occurrence == 0)
            {
                return error;
            }

            int index = error, position = 0;
            if (occurrence > 0)
            {
                while (position < occurrence && (index = value.IndexOf(search, index + 1, comparison)) >= 0)
                {
                    position++;
                }
            }
            else
            {
                occurrence = Math.Abs(occurrence);
                if (occurrence <= 0)
                {
                    return index;
                }

                index = value.Length + 1;
                while (position < occurrence && (index = value.LastIndexOf(search, index - 1, comparison)) >= 0)
                {
                    position++;
                }
            }
            return index;
        }

        /// <summary>
        ///     Retrieve a number of characters from the left-hand side of a string.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="count">The number of characters to retrieve.</param>
        /// <returns>A string containing the leftmost count characters of the string; otherwise, an empty string.</returns>
        public static string Left(this string value, int count)
        {
            return String.IsNullOrEmpty(value) || count < 0
                ? String.Empty
                : count < value.Length ? value.Substring(0, count) : value;
        }

        /// <summary>
        ///     Convert a string to lowercase.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>String to lowercase; otherwise, an empty string.</returns>
        public static string Lower(this string value)
        {
            return String.IsNullOrEmpty(value) ? String.Empty : value.ToLower();
        }

        /// <summary>
        ///     Extracts a number of characters from a string.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="start">The character position to start. ( 0 = first character ).</param>
        /// <param name="count">The number of characters to extract. By default the entire remainder of the string.</param>
        /// <returns>Extracted string.</returns>
        public static string Mid(this string value, int start, int? count = null)
        {
            if (String.IsNullOrEmpty(value))
            {
                return String.Empty;
            }

            if (count.IsNull())
            {
                count = value.Length - start;
            }

            return count < 0 || start < 0 || start + count > value.Length
                ? String.Empty
                // ReSharper disable once PossibleInvalidOperationException
                : value.Substring(start, (int)count);
        }

        /// <summary>
        ///     Convert a null string to an empty string.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>An empty string; otherwise, the original string.</returns>
        public static string NullToEmpty(this string value)
        {
            return value.IsNull() ? String.Empty : value;
        }

        /// <summary>
        ///     Splits a path into the drive, directory, file name and file extension parts.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>A string array with 0 = filepath, 1 = drive, 2 = directory, 3 = filename, 4 = extension.</returns>
        public static string[] PathSplit(this string value)
        {
            const int eFilePath = 0, eDrive = 1, eDir = 2, eFileName = 3, eExtension = 4, eMax = 5;
            var pathSplit = new string[eMax];
            pathSplit[eFilePath] = value;

            if (String.IsNullOrWhiteSpace(value))
            {
                return pathSplit;
            }

            int extension = value.LastIndexOf(".", StringComparison.OrdinalIgnoreCase), slash;

            if (value.IndexOf("/", StringComparison.OrdinalIgnoreCase) >= 0)
            {
                value = value.Replace("/", @"\"); // Replace '/' with '\'
            }
            pathSplit[eDir] = value;
            pathSplit[eDrive] = value.Substring(0, 2); // Drive.
            if (pathSplit[eDrive] == @"\\") // UNC path.
            {
                slash = -1;
                int position = 1;
                while (position <= 3 &&
                       (slash = value.IndexOf(@"\", slash + 1, StringComparison.OrdinalIgnoreCase)) >= 0)
                {
                    position++;
                }
                if (slash >= 0)
                {
                    pathSplit[eDrive] = value.Substring(0, slash - 1);
                }
                pathSplit[eDir] = "A:" + pathSplit[eDir].Substring(pathSplit[eDrive].Length);
                // A: is appended to mimic the standard value if it wasn't UNC.
                extension = value.LastIndexOf(".", StringComparison.OrdinalIgnoreCase);
            }

            slash = pathSplit[eDir].LastIndexOf(@"\", StringComparison.OrdinalIgnoreCase);
            if (extension >= 0) // If an extension exists.
            {
                pathSplit[eExtension] = pathSplit[eDir].Substring(extension); // Extension.
                pathSplit[eFileName] = pathSplit[eDir].Substring(slash);
                pathSplit[eFileName] = pathSplit[eFileName].Substring(1,
                    pathSplit[eFileName].Length - pathSplit[eExtension].Length - 1);
            }
            else
            {
                if (pathSplit[eDir][pathSplit[eDir].Length - 1] != '\\')
                // If backslash doesn't exist (when it's a directory) then append to the end.
                {
                    pathSplit[eDir] += @"\";
                    slash += 1; // slash = pathSplit[eDir].LastIndexOf(@"\", StringComparison.OrdinalIgnoreCase);
                }
            }

            pathSplit[eDir] = pathSplit[eDir].Substring(0, slash + 1); // Path.
            pathSplit[eDir] = pathSplit[eDir].Substring(2);
            return pathSplit;
        }

        /// <summary>
        ///     Repeats a string a specified number of times.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="count">Number of times to repeat the string.</param>
        /// <returns>Repeated string; otherwise, an empty string.</returns>
        public static string Repeat(this string value, int count)
        {
            if (String.IsNullOrEmpty(value) || count <= 0)
            {
                return String.Empty;
            }

            string result = String.Empty; // From AutoIt's _StringRepeat().
            while (count > 1)
            {
                if ((count & 1) == 1)
                {
                    result += value;
                }
                value += value;
                count = count >> 1;
            }
            return value + result;

            //return String.Join(value, new string[++count]);
            // http://rosettacode.org/wiki/Repeat_a_string#C.23

            //var @string = new StringBuilder(value.Length * count--);
            //@string.Append(value);

            //for (int i = 0; i < count; i++)
            //{
            //    @string.Append(value);
            //}
            //return @string.ToString();
        }

        /// <summary>
        ///     Reverses the contents of a string.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <returns>Reversed string; otherwise, an empty string.</returns>
        public static string Reverse(this string value)
        {
            if (String.IsNullOrEmpty(value))
            {
                return String.Empty;
            }

            var array = value.ToCharArray();
            for (int i = 0, j = array.Length - 1; i < j; i++, j--)
            // This version is a slightly optimised version than Array.Reverse().
            {
                char temp = array[i];
                array[i] = array[j];
                array[j] = temp;
            }

            return new string(array);

            //char[] array = value.ToCharArray();
            //Array.Reverse(array);
            //return new string(array);
        }

        /// <summary>
        ///     Retrieve a number of characters from the right-hand side of a string.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="count">The number of characters to retrieve.</param>
        /// <returns>A string containing the rightmost count characters of the string; otherwise, an empty string.</returns>
        public static string Right(this string value, int count)
        {
            return String.IsNullOrEmpty(value) || count < 0
                ? String.Empty
                : count < value.Length ? value.Substring(value.Length - count, count) : value;
        }

        /// <summary>
        ///     Convert the string to Rot13 (alpha characters only).
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>Rot13 string; otherwise, an empty string.</returns>
        public static string Rot13(this string value)
        {
            return String.IsNullOrEmpty(value)
                ? String.Empty
                : new string(value.ToCharArray().Select(
                    @char =>
                        (char)
                            (@char >= 'A' && @char <= 'M' || @char >= 'a' && @char <= 'm'
                                ? @char + 13
                                : @char >= 'N' && @char <= 'Z' || @char >= 'n' && @char <= 'z' ? @char - 13 : @char
                                )
                    ).ToArray());

            //if (String.IsNullOrEmpty(value))
            //{
            //    return String.Empty;
            //}

            //char[] array = value.ToCharArray();
            //for (int i = 0; i < array.Length; i++)
            //{
            //    if (array[i] >= 'A' && array[i] <= 'M' || array[i] >= 'a' && array[i] <= 'm')
            //    {
            //        array[i] = (char)(array[i] + 13);
            //    }
            //    else if (array[i] >= 'N' && array[i] <= 'Z' || array[i] >= 'n' && array[i] <= 'z')
            //    {
            //        array[i] = (char)(array[i] - 13);
            //    }
            //}

            //return new string(array);
        }

        /// <summary>
        ///     Convert the string to Rot18 (alphanumeric only).
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>Rot18 string; otherwise, an empty string.</returns>
        public static string Rot18(this string value)
        {
            return String.IsNullOrEmpty(value)
                ? String.Empty
                : new string(value.ToCharArray().Select(
                    @char =>
                        (char)
                            (
                                @char >= '0' && @char <= '4'
                                    ? @char + 5
                                    : @char >= '5' && @char <= '9'
                                        ? @char - 5
                                        : @char >= 'A' && @char <= 'M' || @char >= 'a' && @char <= 'm'
                                            ? @char + 13
                                            : @char >= 'N' && @char <= 'Z' || @char >= 'n' && @char <= 'z'
                                                ? @char - 13
                                                : @char
                                )
                    ).ToArray());
        }

        /// <summary>
        ///     Convert the string to Rot47 (alphanumeric and symbols only).
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>Rot47 string; otherwise, an empty string.</returns>
        public static string Rot47(this string value)
        {
            return String.IsNullOrEmpty(value)
                ? String.Empty
                : new string(value.ToCharArray().Select(
                    @char =>
                        (char)
                            (
                                @char >= 33 && @char <= 79
                                    ? @char + 47
                                    : @char >= 80 && @char <= 126 ? @char - 47 : @char
                                )
                    ).ToArray());
        }

        /// <summary>
        ///     Convert the string to Rot5 (digits only).
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>Rot5 string; otherwise, an empty string.</returns>
        public static string Rot5(this string value)
        {
            return String.IsNullOrEmpty(value)
                ? String.Empty
                : new string(value.ToCharArray().Select(
                    @char =>
                        (char)
                            (
                                !Char.IsDigit(@char)
                                    ? @char
                                    : @char >= '0' && @char <= '4' ? @char + 5 : @char - 5
                                )
                    ).ToArray());
        }

        /// <summary>
        ///     Removes all carriage return values ( (char)13 ) from a string.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>The string with all instances of the (char)13 character removed; otherwise, an empty string.</returns>
        public static string StripCR(this string value)
        {
            return String.IsNullOrEmpty(value) ? String.Empty : new Regex("\r").Replace(value, String.Empty);
        }

        /// <summary>
        ///     Removes all line-feed values ( (char)10 ) from a string.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>The string with all instances of the (char)10 character removed; otherwise, an empty string.</returns>
        public static string StripLF(this string value)
        {
            return String.IsNullOrEmpty(value) ? String.Empty : new Regex("\n").Replace(value, String.Empty);
        }

        /// <summary>
        ///     Strips the white space ( (char)0, (char)9-(char)13 and (char)32 ) in a string.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <param name="flags">Flags related to stripping white space.</param>
        /// <returns>The new string stripped of the requested white space; otherwise, an empty string.</returns>
        public static string StripWS(this string value, StringStripWS flags)
        {
            if (String.IsNullOrEmpty(value))
            {
                return String.Empty;
            }

            if ((flags & StringStripWS.All) == StringStripWS.All)
            {
                return new Regex(@"\s").Replace(value, String.Empty);
            }

            if ((flags & StringStripWS.Spaces) == StringStripWS.Spaces)
            {
                value = Regex.Replace(value, @"\s{2,}", String.Empty);
            }

            if ((flags & StringStripWS.Leading) == StringStripWS.Leading)
            {
                value = value.TrimStart();
            }

            if ((flags & StringStripWS.Trailing) == StringStripWS.Trailing)
            {
                value = value.TrimEnd();
            }
            return value;
        }

        /// <summary>
        ///     Trims a number of characters from the left hand side of a string.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="count">The number of characters to trim.</param>
        /// <returns>The string trimmed by count characters from the left; otherwise, an empty string.</returns>
        public static string TrimLeft(this string value, int count)
        {
            if (String.IsNullOrEmpty(value))
            {
                return String.Empty;
            }

            count = (count < 0 || count >= value.Length ? value.Length : count);
            return value.Substring(count, value.Length - count);
        }

        /// <summary>
        ///     Trims a number of characters from the right hand side of a string.
        /// </summary>
        /// <param name="value">The string to evaluate.</param>
        /// <param name="count">The number of characters to trim.</param>
        /// <returns>The string trimmed by count characters from the right; otherwise, an empty string.</returns>
        public static string TrimRight(this string value, int count)
        {
            if (String.IsNullOrEmpty(value))
            {
                return String.Empty;
            }

            count = value.Length - (count < 0 || count > value.Length ? value.Length : count);
            return value.Substring(0, count);
        }

        /// <summary>
        ///     Convert a string to uppercase.
        /// </summary>
        /// <param name="value">The string to convert.</param>
        /// <returns>String to uppercase; otherwise, an empty string.</returns>
        public static string Upper(this string value)
        {
            return String.IsNullOrEmpty(value) ? String.Empty : value.ToUpper();
        }
    }

    /// <summary>
    ///     Extension methods related to checking if a string is equal to a condition.
    /// </summary>
    public static class StringIs
    {
        /// <summary>
        ///     Checks if a string is representing T.
        /// </summary>
        /// <typeparam name="T">Specifies the type to check.</typeparam>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was a T datatype; otherwise, false.</returns>
        public static bool Is<T>(this string value)
        // http://stackoverflow.com/questions/1654871/generic-tryparse-extension-method
        {
            var type = typeof(T);
            var tryParseMethod = type.GetMethod(
                "TryParse",
                new[]
                {
                    typeof (string),
                    type.MakeByRefType()
                });

            if (tryParseMethod.IsNull())
            {
                return false;
            }

            bool result = false;
            object[] parameters = { value, default(T) };
            var isExecuted = tryParseMethod.Invoke(null, parameters);
            if (isExecuted is bool)
            {
                result = (bool)isExecuted;
            }
            return result;
        }

        /// <summary>
        ///     Checks if a string contains only alphanumeric characters ( 0-9 and A-Z ).
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string contains only alphanumeric characters; otherwise, false.</returns>
        public static bool IsAlNum(this string value)
        {
            return !String.IsNullOrEmpty(value) && value.All(Char.IsLetterOrDigit);
        }

        /// <summary>
        ///     Checks if a string contains only alphabetic characters ( A-Z ).
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string contains only alphabetic characters; otherwise, false.</returns>
        public static bool IsAlpha(this string value)
        {
            return !String.IsNullOrEmpty(value) && value.All(Char.IsLetter);
        }

        /// <summary>
        ///     Checks if a string contains only ASCII characters ( 0-127 ).
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string contains only ASCII characters; otherwise, false.</returns>
        public static bool IsASCII(this string value)
        {
            return !String.IsNullOrEmpty(value) && value.All(@char => @char <= '\x007f');
        }

        /// <summary>
        ///     Checks if a string is representing a boolean value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsBool(this string value)
        {
            bool result;
            return bool.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing an 8-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsByte(this string value)
        {
            byte result;
            return byte.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a char value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsChar(this string value)
        {
            char result;
            return char.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a DateTime value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsDateTime(this string value)
        {
            DateTime result;
            return DateTime.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a decimal value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsDecimal(this string value)
        {
            decimal result;
            return decimal.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string contains only digit characters ( 0-9 ).
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if value contains only digit characters; otherwise, false.</returns>
        public static bool IsDigit(this string value)
        {
            return !String.IsNullOrEmpty(value) && new Regex(@"^[-+]?\d+$", RegexOptions.Compiled).IsMatch(value);
        }

        /// <summary>
        ///     Checks if a string is representing a double value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsDouble(this string value)
        {
            double result;
            return double.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing an email.
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string was an email; otherwise, false.</returns>
        public static bool IsEmail(this string value)
        {
            return !String.IsNullOrEmpty(value) && new Regex(
                @"^[A-Za-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[A-Za-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[A-Za-z0-9](?:[A-Za-z0-9-]*[A-Za-z0-9])?\.)+[A-Za-z0-9](?:[A-Za-z0-9-]*[A-Za-z0-9])?$")
                .IsMatch(value); // http://www.regular-expressions.info/email.html, modified by guinness.
        }

        /// <summary>
        ///     Check if a string is empty.
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string was empty; otherwise, false.</returns>
        public static bool IsEmpty(this string value)
        {
            return value.IsNotNull() && value.Length == 0;
        }

        /// <summary>
        ///     Checks if a string is representing a float value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsFloat(this string value)
        {
            float result;
            return float.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a Guid value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsGuid(this string value)
        {
            return !String.IsNullOrEmpty(value) &&
                   new Regex(@"^(?:(?<curly>\{)?[0-9A-Fa-f]{8}-(?:[0-9A-Fa-f]{4}-){3}[0-9A-Fa-f]{12}(?(curly)\}))$")
                       .IsMatch(value);
            //Guid result;
            //return Guid.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a hexadecimal value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsHex(this string value)
        {
            return !String.IsNullOrEmpty(value) && new Regex(@"^0[xX][\dA-Fa-f]+$").IsMatch(value);
        }

        /// <summary>
        ///     Checks if a string is representing a 32-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsInt(this string value)
        {
            int result;
            return int.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a 16-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsInt16(this string value)
        {
            return IsShort(value);
        }

        /// <summary>
        ///     Checks if a string is representing a 32-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsInt32(this string value)
        {
            return IsInt(value);
        }

        /// <summary>
        ///     Checks if a string is representing a 64-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsInt64(this string value)
        {
            return IsLong(value);
        }

        /// <summary>
        ///     Checks if a string is representing an IP address.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was an IP address; otherwise, false.</returns>
        public static bool IsIPAddress(this string value)
        {
            // Regular expression modified by guinness.
            return !String.IsNullOrEmpty(value) && new Regex(value).IsMatch(
                @"^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$");
        }

        /// <summary>
        ///     Checks if a string contains a valid ISBN number.
        /// </summary>
        /// <param name="isbn">A string containing the value to check.</param>
        /// <param name="type">An ISBN flag of the type to check.</param>
        /// <returns>true if a valid ISBN number; otherwise, false.</returns>
        public static bool IsISBN(string isbn, ISBN type)
        {
            if (String.IsNullOrWhiteSpace(isbn))
            {
                return false;
            }

            int length = isbn.Length - 1;
            int counter, sum = 0;
            switch (type)
            {
                case ISBN.Ten:
                    {
                        if (isbn[length] == 'x' || isbn[length] == 'X')
                        {
                            length -= 1;
                            sum = 10;
                        }

                        counter = 10;
                        for (int i = 0; i <= length; i++)
                        {
                            if (isbn[i] < '0' || isbn[i] > '9')
                            {
                                continue;
                            }
                            sum += (isbn[i] - '0') * counter;
                            counter -= 1;
                        }
                        return sum % 11 == 0; // Divisible by 11.
                    }
                case ISBN.Thirteen:
                    {
                        const int one = 1, three = 3;
                        counter = one;
                        for (int i = 0; i <= length; i++)
                        {
                            if (isbn[i] < '0' || isbn[i] > '9')
                            {
                                continue;
                            }
                            sum += (isbn[i] - '0') * counter;
                            counter = (counter == one) ? three : one;
                        }
                        return sum % 10 == 0; // Divisible by 10.
                    }
            }

            return false;
        }
        /// <summary>
        ///     Checks if a string is representing a 64-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsLong(this string value)
        {
            long result;
            return long.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string contains only lowercase characters.
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string contains only lowercase characters.; otherwise, false.</returns>
        public static bool IsLower(this string value)
        {
            return !String.IsNullOrEmpty(value) && value.All(Char.IsLower);
        }

        /// <summary>
        ///     Check if a string is null or empty.
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string was null or empty; otherwise, false.</returns>
        public static bool IsNullOrEmpty(this string value)
        {
            return String.IsNullOrEmpty(value);
        }

        /// <summary>
        ///     Checks if a string is representing a numerical representation.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if string was a numerical representation; otherwise, false.</returns>
        public static bool IsNumerical(this string value)
        {
            return
                !String.IsNullOrEmpty(value) && new Regex(
                    String.Format(@"^[-+]?\d+(?:{0}\d+)?$", NumberFormatInfo.CurrentInfo.NumberDecimalSeparator),
                    RegexOptions.Compiled).IsMatch(value);
            //return IsDouble(value);
        }

        /// <summary>
        ///     Checks if a string is a palindrome.
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string was a palindrome; otherwise, false.</returns>
        public static bool IsPalindrome(this string value)
        {
            if (String.IsNullOrEmpty(value))
            {
                return false;
            }

            for (int i = 0, j = value.Length - 1; i < j; i++, j--)
            {
                while (!Char.IsLetterOrDigit(value[i]))
                {
                    i++;
                }

                while (!Char.IsLetterOrDigit(value[j]))
                {
                    j--;
                }

                if (!Char.ToUpper(value[i]).Equals(Char.ToUpper(value[j])))
                {
                    return false;
                }
            }
            return true;
            //value = Regex.Replace(value, @"\W", ""); // Remove all non-word characters.
            //char[] array = value.ToCharArray();
            //Array.Reverse(array);
            //return String.Equals(new string(array), value, StringComparison.CurrentCultureIgnoreCase);
        }

        /// <summary>
        ///     Checks if a string is representing an 8-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsSByte(this string value)
        {
            sbyte result;
            return sbyte.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a 16-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsShort(this string value)
        {
            short result;
            return short.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string contains only whitespace characters ( (char)0, (char)9-(char)13 and (char)32 ).
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string contains only whitespace characters; otherwise, false.</returns>
        public static bool IsSpace(this string value)
        {
            return String.IsNullOrEmpty(value) || value.All(Char.IsWhiteSpace);
            //return !String.IsNullOrEmpty(value) && value.All(@char => (@char >= '\x0009' && @char <= '\x000d') || @char == '\x0000' || @char == '\x0020');
        }

        /// <summary>
        ///     Checks if a string contains characters.
        /// </summary>
        /// <param name="value">A string containing characters to check.</param>
        /// <returns>true if string contained characters; otherwise, false.</returns>
        public static bool IsString(this string value)
        {
            return !String.IsNullOrEmpty(value);
        }

        /// <summary>
        ///     Determines the TypeCode the string is representing.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>TypeCode the string is representing.</returns>
        public static TypeCode IsType(this string value)
        {
            if (String.IsNullOrEmpty(value))
            {
                return TypeCode.Empty;
            }

            if (new Regex(@"^-?\d+$").IsMatch(value)) // Integer
            {
                if (value.Substring(0, 1) == "-") // Negative number.
                {
                    SByte @sbyte;
                    if (SByte.TryParse(value, out @sbyte))
                    {
                        return TypeCode.SByte;
                    }

                    Int16 int16;
                    if (Int16.TryParse(value, out int16))
                    {
                        return TypeCode.Int16;
                    }

                    Int32 int32;
                    if (Int32.TryParse(value, out int32))
                    {
                        return TypeCode.Int32;
                    }

                    Int64 int64;
                    if (Int64.TryParse(value, out int64))
                    {
                        return TypeCode.Int64;
                    }
                }
                else
                {
                    Byte @byte;
                    if (Byte.TryParse(value, out @byte))
                    {
                        return TypeCode.Byte;
                    }

                    UInt16 uint16;
                    if (UInt16.TryParse(value, out uint16))
                    {
                        return TypeCode.UInt16;
                    }

                    UInt32 uint32;
                    if (UInt32.TryParse(value, out uint32))
                    {
                        return TypeCode.Int32;
                    }

                    UInt64 uint64;
                    if (UInt64.TryParse(value, out uint64))
                    {
                        return TypeCode.UInt64;
                    }
                }
            }
            else // Double
            {
                string formatted = String.Format(@"^[\d{0}]+$", NumberFormatInfo.CurrentInfo.NumberDecimalSeparator);
                if (new Regex(formatted).IsMatch(value))
                {
                    Single @float;
                    if (Single.TryParse(value, out @float))
                    {
                        return TypeCode.Single;
                    }

                    Double @double;
                    if (Double.TryParse(value, out @double))
                    {
                        return TypeCode.Double;
                    }

                    Decimal @decimal;
                    if (Decimal.TryParse(value, out @decimal))
                    {
                        return TypeCode.Decimal;
                    }
                }
                else
                {
                    Boolean @bool;
                    if (Boolean.TryParse(value, out @bool))
                    {
                        return TypeCode.Boolean;
                    }

                    Char @char;
                    if (Char.TryParse(value, out @char))
                    {
                        return TypeCode.Char;
                    }

                    DateTime datetime;
                    if (DateTime.TryParse(value, out datetime))
                    {
                        return TypeCode.DateTime;
                    }
                }
            }
            return TypeCode.String;
        }

        /// <summary>
        ///     Checks if a string is representing a 32-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsUInt(this string value)
        {
            uint result;
            return uint.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string is representing a 16-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsUInt16(this string value)
        {
            return IsUShort(value);
        }

        /// <summary>
        ///     Checks if a string is representing a 32-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsUInt32(this string value)
        {
            return IsUInt(value);
        }

        /// <summary>
        ///     Checks if a string is representing a 64-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsUInt64(this string value)
        {
            return IsULong(value);
        }

        /// <summary>
        ///     Checks if a string is representing a 64-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsULong(this string value)
        {
            ulong result;
            return ulong.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string contains only uppercase characters.
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string contains contains only uppercase characters; otherwise, false.</returns>
        public static bool IsUpper(this string value)
        {
            return !String.IsNullOrEmpty(value) && value.All(Char.IsUpper);
        }

        /// <summary>
        ///     Checks if a string is representing a 16-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was the correct datatype; otherwise, false.</returns>
        public static bool IsUShort(this string value)
        {
            ushort result;
            return ushort.TryParse(value, out result);
        }

        /// <summary>
        ///     Checks if a string doesn't contain a set of characters.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <param name="invalid">A pattern of characters that shouldn't be present e.g. '\/|:"'</param>
        /// <returns>true if string didn't contain the set of characters; otherwise, false.</returns>
        public static bool IsValid(this string value, string invalid)
        {
            return
                !String.IsNullOrEmpty(value) && !String.IsNullOrEmpty(invalid) &&
                new Regex(String.Format(@"[{0}]", Regex.Escape(invalid)), RegexOptions.IgnoreCase).IsMatch(value);
        }

        /// <summary>
        ///     Checks if a string doesn't contain a set of characters.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <param name="invalid">A char array of characters that shouldn't be present e.g. '\/|:"'</param>
        /// <returns>true if string didn't contain the set of characters; otherwise, false.</returns>
        public static bool IsValid(this string value, char[] invalid)
        {
            return !invalid.IsNull() && invalid.Length != 0 && value.IsValid(new string(invalid));
        }

        /// <summary>
        ///     Checks if a filepath contains an approved filetype extension.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <param name="fileTypes">A string of filetype extensions delimited with ';' e.g. 'exe;txt;bat'.</param>
        /// <returns>true if filepath was approved; otherwise, false.</returns>
        public static bool IsValidType(this string value, string fileTypes)
        {
            return
                !String.IsNullOrEmpty(value) && !String.IsNullOrEmpty(fileTypes) &&
                new Regex(String.Format(@"\.(?:{0})$", Regex.Escape(fileTypes).Replace(';', '|')),
                    RegexOptions.IgnoreCase).IsMatch(value);
        }

        /// <summary>
        ///     Checks if a string is representing a web safe color.
        /// </summary>
        /// <param name="value">A string containing the value to check.</param>
        /// <returns>true if value was a web safe color; otherwise, false.</returns>
        public static bool IsWebSafeColor(this string value)
        {
            return
                !String.IsNullOrEmpty(value) && new Regex(@"^(?:#|0[xX])?(([CcFf0369])\2){3}$").IsMatch(value);
        }

        /// <summary>
        ///     Checks if a string contains only hexadecimal digit characters ( 0-9 and A-F ).
        /// </summary>
        /// <param name="value">A string to check.</param>
        /// <returns>true if string contains only hexadecimal digit characters; otherwise, false.</returns>
        public static bool IsXDigit(this string value)
        {
            return !String.IsNullOrEmpty(value) && value.All(@char => Char.IsDigit(@char) ||
                                                                      (@char >= 'a' && @char <= 'f') ||
                                                                      (@char >= 'A' && @char <= 'F'));
            //return !String.IsNullOrEmpty(value) && new Regex(@"^[\dA-Fa-f]+$", RegexOptions.Compiled).IsMatch(value);
        }
    }

    /// <summary>
    ///     Extension methods related to parsing strings to another datatype.
    /// </summary>
    public static class StringParse
    {
        /// <summary>
        ///     Convert a string as a T value.
        /// </summary>
        /// <typeparam name="T">Specifies the type to convert to.</typeparam>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a T datatype.</returns>
        public static T ParseAs<T>(this string value)
        // http://stackoverflow.com/questions/1654871/generic-tryparse-extension-method
        {
            var type = typeof(T);
            var tryParseMethod = type.GetMethod(
                "TryParse",
                new[]
                {
                    typeof (string),
                    type.MakeByRefType()
                });

            var result = default(T);
            if (tryParseMethod.IsNull())
            {
                return result;
            }

            object[] parameters = { value, result };
            var isExecuted = tryParseMethod.Invoke(null, parameters);
            if (!(isExecuted is bool))
            {
                return result;
            }

            bool successful = (bool)isExecuted;
            if (successful)
            {
                result = (T)parameters[1];
            }
            return result;
        }

        /// <summary>
        ///     Convert a string as a boolean value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a boolean datatype.</returns>
        public static bool ParseAsBool(this string value)
        {
            bool result;
            bool.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as an 8-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of the 8-bit unsigned integer datatype.</returns>
        public static byte ParseAsByte(this string value)
        {
            byte result;
            byte.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a char value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a char datatype.</returns>
        public static char ParseAsChar(this string value)
        {
            char result;
            char.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a DateTime value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a DateTime datatype.</returns>
        public static DateTime ParseAsDateTime(this string value)
        {
            DateTime result;
            DateTime.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a decimal value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a decimal datatype.</returns>
        public static decimal ParseAsDecimal(this string value)
        {
            decimal result;
            decimal.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a double value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a double datatype.</returns>
        public static double ParseAsDouble(this string value)
        {
            double result;
            double.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a float value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a float datatype.</returns>
        public static float ParseAsFloat(this string value)
        {
            float result;
            float.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a hexadecimal number to an unsigned 32-bit integer.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 32-bit unsigned integer datatype.</returns>
        public static uint ParseAsHex(this string value)
        {
            uint result = default(uint);
            if (!value.IsHex())
            {
                return result;
            }

            value = value.Substring(2);
            uint.TryParse(value, NumberStyles.HexNumber, CultureInfo.CurrentCulture, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a 32-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 32-bit signed integer datatype.</returns>
        public static int ParseAsInt(this string value)
        {
            int result;
            int.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a 16-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 16-bit signed integer datatype.</returns>
        public static Int16 ParseAsInt16(this string value)
        {
            return ParseAsShort(value);
        }

        /// <summary>
        ///     Convert a string as a 32-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 32-bit signed integer datatype.</returns>
        public static Int32 ParseAsInt32(this string value)
        {
            return ParseAsInt(value);
        }

        /// <summary>
        ///     Convert a string as a 64-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 64-bit signed integer datatype.</returns>
        public static Int64 ParseAsInt64(this string value)
        {
            return ParseAsLong(value);
        }

        /// <summary>
        ///     Convert a string as a 64-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 64-bit signed integer datatype.</returns>
        public static long ParseAsLong(this string value)
        {
            long result;
            long.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as an 8-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 8-bit signed integer datatype.</returns>
        public static sbyte ParseAsSByte(this string value)
        {
            sbyte result;
            sbyte.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a 16-bit signed integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 16-bit signed integer datatype.</returns>
        public static short ParseAsShort(this string value)
        {
            short result;
            short.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a 32-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 32-bit unsigned integer datatype.</returns>
        public static uint ParseAsUInt(this string value)
        {
            uint result;
            uint.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a 16-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 16-bit unsigned integer datatype.</returns>
        public static UInt16 ParseAsUInt16(this string value)
        {
            return ParseAsUShort(value);
        }

        /// <summary>
        ///     Convert a string as a 32-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 32-bit unsigned integer datatype.</returns>
        public static UInt32 ParseAsUInt32(this string value)
        {
            return ParseAsUInt(value);
        }

        /// <summary>
        ///     Convert a string as a 64-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 64-bit unsigned integer datatype.</returns>
        public static UInt64 ParseAsUInt64(this string value)
        {
            return ParseAsULong(value);
        }

        /// <summary>
        ///     Convert a string as a 64-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 64-bit unsigned integer datatype.</returns>
        public static ulong ParseAsULong(this string value)
        {
            ulong result;
            ulong.TryParse(value, out result);
            return result;
        }

        /// <summary>
        ///     Convert a string as a 16-bit unsigned integer value.
        /// </summary>
        /// <param name="value">A string containing the value to convert.</param>
        /// <returns>converted value; otherwise, default value of a 16-bit unsigned integer datatype.</returns>
        public static ushort ParseAsUShort(this string value)
        {
            ushort result;
            ushort.TryParse(value, out result);
            return result;
        }
    }
}
Edited by guinness

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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Added Rot5, Rot13, Rot18 and Rot47 extension methods to post #9.

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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Added Between, InStr and PathSplit extension methods to post #9.

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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Added IsISBN extension method to post #9.

UDF List:

 
_AdapterConnections()_AlwaysRun()_AppMon()_AppMonEx()_ArrayFilter/_ArrayReduce_BinaryBin()_CheckMsgBox()_CmdLineRaw()_ContextMenu()_ConvertLHWebColor()/_ConvertSHWebColor()_DesktopDimensions()_DisplayPassword()_DotNet_Load()/_DotNet_Unload()_Fibonacci()_FileCompare()_FileCompareContents()_FileNameByHandle()_FilePrefix/SRE()_FindInFile()_GetBackgroundColor()/_SetBackgroundColor()_GetConrolID()_GetCtrlClass()_GetDirectoryFormat()_GetDriveMediaType()_GetFilename()/_GetFilenameExt()_GetHardwareID()_GetIP()_GetIP_Country()_GetOSLanguage()_GetSavedSource()_GetStringSize()_GetSystemPaths()_GetURLImage()_GIFImage()_GoogleWeather()_GUICtrlCreateGroup()_GUICtrlListBox_CreateArray()_GUICtrlListView_CreateArray()_GUICtrlListView_SaveCSV()_GUICtrlListView_SaveHTML()_GUICtrlListView_SaveTxt()_GUICtrlListView_SaveXML()_GUICtrlMenu_Recent()_GUICtrlMenu_SetItemImage()_GUICtrlTreeView_CreateArray()_GUIDisable()_GUIImageList_SetIconFromHandle()_GUIRegisterMsg()_GUISetIcon()_Icon_Clear()/_Icon_Set()_IdleTime()_InetGet()_InetGetGUI()_InetGetProgress()_IPDetails()_IsFileOlder()_IsGUID()_IsHex()_IsPalindrome()_IsRegKey()_IsStringRegExp()_IsSystemDrive()_IsUPX()_IsValidType()_IsWebColor()_Language()_Log()_MicrosoftInternetConnectivity()_MSDNDataType()_PathFull/GetRelative/Split()_PathSplitEx()_PrintFromArray()_ProgressSetMarquee()_ReDim()_RockPaperScissors()/_RockPaperScissorsLizardSpock()_ScrollingCredits_SelfDelete()_SelfRename()_SelfUpdate()_SendTo()_ShellAll()_ShellFile()_ShellFolder()_SingletonHWID()_SingletonPID()_Startup()_StringCompact()_StringIsValid()_StringRegExpMetaCharacters()_StringReplaceWholeWord()_StringStripChars()_Temperature()_TrialPeriod()_UKToUSDate()/_USToUKDate()_WinAPI_Create_CTL_CODE()_WinAPI_CreateGUID()_WMIDateStringToDate()/_DateToWMIDateString()Au3 script parsingAutoIt SearchAutoIt3 PortableAutoIt3WrapperToPragmaAutoItWinGetTitle()/AutoItWinSetTitle()CodingDirToHTML5FileInstallrFileReadLastChars()GeoIP databaseGUI - Only Close ButtonGUI ExamplesGUICtrlDeleteImage()GUICtrlGetBkColor()GUICtrlGetStyle()GUIEventsGUIGetBkColor()Int_Parse() & Int_TryParse()IsISBN()LockFile()Mapping CtrlIDsOOP in AutoItParseHeadersToSciTE()PasswordValidPasteBinPosts Per DayPreExpandProtect GlobalsQueue()Resource UpdateResourcesExSciTE JumpSettings INISHELLHOOKShunting-YardSignature CreatorStack()Stopwatch()StringAddLF()/StringStripLF()StringEOLToCRLF()VSCROLLWM_COPYDATAMore Examples...

Updated: 22/04/2018

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