kylomas Posted January 9, 2013 Posted January 9, 2013 Easy scoping rules: Scope defines how long the variable persists (exists). If a variable is defined outside of a function it is "global" in scope. The variable persists for the life of the script. If you define a variable within a function it is local to that function unless you use the "global" keyword which makes it global in scope. Variables local to a function persist for the life of the function. This does not pertain to variables defined "static" as this feature is experimental. kylomas Forum Rules Procedure for posting code "I like pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals." - Sir Winston Churchill
kylomas Posted January 9, 2013 Posted January 9, 2013 @icuurd12b42Actually For creates a local variable.This is a good example to illustrate my previous post. If the for loop exists outside of a function then the control variable is "global" in scope, if inside a function then it's scope is local to that function. kylomas Forum Rules Procedure for posting code "I like pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals." - Sir Winston Churchill
BrewManNH Posted January 9, 2013 Posted January 9, 2013 This is a good example to illustrate my previous post. If the for loop exists outside of a function then the control variable is "global" in scope, if inside a function then it's scope is local to that function. kylomas After a bit of testing I came up with a demonstration of how this works in AutoIt. For $i = 1 To 5 ConsoleWrite("> Outer loop's $I = " & $I & @crlf ) Test() Next ConsoleWrite("> Outer loop's $I (outside the loop) = " & $I & @crlf ) Test2() Func Test() For $I = 1 To 5 ConsoleWrite("! Inner loop's $I = " & $I & @crlf ) Next ConsoleWrite("' Inner loop's $I (outside the loop)= " & $I & @crlf ) EndFunc Func Test2() ConsoleWrite("> Outer loop's $I (now global) = " & $I & @crlf ) EndFunc Run this and you'll see that the $I variable outside the function is globally declared, but because you use the same variable in the loop inside the function, THAT one becomes local and doesn't affect the global variable, even though you don't explicitly declare its scope. If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag GudeHow to ask questions the smart way! I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from. Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays. - ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script. - Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label. - _FileGetProperty - Retrieve the properties of a file - SciTE Toolbar - A toolbar demo for use with the SciTE editor - GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI. - Latin Square password generator
kylomas Posted January 9, 2013 Posted January 9, 2013 @BrewnamNH - Exactly, I'm not sure why scope has come up so often lately?!? Forum Rules Procedure for posting code "I like pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals." - Sir Winston Churchill
icuurd12b42 Posted January 9, 2013 Posted January 9, 2013 Neat. Thanks for the info. I like the file scope vars. that is useful
trancexx Posted January 9, 2013 Posted January 9, 2013 AutoIt doesn't have file scope. You either don't know what file scope is or use the wrong terms. ♡♡♡ . eMyvnE
guinness Posted January 10, 2013 Posted January 10, 2013 I had the tendency in the past to throw the term 'file scope' around, but I have learnt my lesson since then. 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 parsing • AutoIt Search • AutoIt3 Portable • AutoIt3WrapperToPragma • AutoItWinGetTitle()/AutoItWinSetTitle() • Coding • DirToHTML5 • FileInstallr • FileReadLastChars() • GeoIP database • GUI - Only Close Button • GUI Examples • GUICtrlDeleteImage() • GUICtrlGetBkColor() • GUICtrlGetStyle() • GUIEvents • GUIGetBkColor() • Int_Parse() & Int_TryParse() • IsISBN() • LockFile() • Mapping CtrlIDs • OOP in AutoIt • ParseHeadersToSciTE() • PasswordValid • PasteBin • Posts Per Day • PreExpand • Protect Globals • Queue() • Resource Update • ResourcesEx • SciTE Jump • Settings INI • SHELLHOOK • Shunting-Yard • Signature Creator • Stack() • Stopwatch() • StringAddLF()/StringStripLF() • StringEOLToCRLF() • VSCROLL • WM_COPYDATA • More Examples... Updated: 22/04/2018
czardas Posted January 10, 2013 Posted January 10, 2013 (edited) File scope sounds scary to me. This article seems to have it covered. Actually, from reading that, File Scope seems very useful and far less scary than Global Scope. Edited January 10, 2013 by czardas operator64 ArrayWorkshop
icuurd12b42 Posted March 9, 2013 Posted March 9, 2013 Thanks. The term was used with my co workers often in my days. It is still a valid term but maybe obsolete? I dont know but good find on wikipedia.
Milanezi Posted March 9, 2013 Posted March 9, 2013 Every recursive loop can be done with a for/while loop if you think it through. Recursive things are sometimes hard to grasp and better to be avoided for reasons as: understanding it or safety for your program (you don't want to have 1000 recursive loops)
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