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Shaarad

Palindrome Program

4 posts in this topic

Hello Everyone,

I have made a program that accepts a string and checks if it is palindrome or not.

However, I am curious if it is made shorter and easier...

Here it is...

$string=StringLower(stringstripws(inputbox ("Palindrome Check :","Enter the string" & @CR & "Any spaces in the string will be cut off"),8))
$checkvar=1
if isint(stringlen($string)/2)=0 Then
    for $i=1 to (stringlen($string)/2)-0.5
        $1char=""
        $2char=""
        $1char=stringmid($string,$i,1)
        $2char=stringmid($string,stringlen($string)-$i+1,1)
        if number(asc($1char))<>number(asc($2char)) Then
            $checkvar=0
            ExitLoop
        EndIf
    Next
Elseif isint(stringlen($string)/2)=1 Then
    for $i=1 to stringlen($string)/2 
        $1char=stringmid($string,$i,1)
        $2char=stringmid($string,stringlen($string)-$i+1,1)
        if  number(asc($1char))<>number(asc($2char)) Then
            $checkvar=0
            ExitLoop
        EndIf
    Next
EndIf
if $checkvar=0 Then
    msgbox (64,"Palindrome Check","String is NOT palindrome")
ElseIf $checkvar=1 Then
    msgbox (64,"Pakindrome Check","String is palindrome")
EndIf

Common sense plays a role in the basics of understanding AutoIt... If you're lacking in that, do us all a favor, and step away from the computer.

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Shaarad,

My attempt: :huh2:

#Include <String.au3>

$sString = StringLower(StringStripWS(InputBox("Palindrome Check :", "Enter the string" & @CR & "Any spaces in the string will be ignored"), 8))

$sMsg = "String is NOT palindrome"
If $sString == _StringReverse($sString) Then
    $sMsg = "String is palindrome"
EndIf

MsgBox(64, "Palindrome Check", $sMsg)

M23


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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:huh2:

lol...that was obvious but i didnt realise that !

Thanks a lot... saves a lot of lines ;)


Common sense plays a role in the basics of understanding AutoIt... If you're lacking in that, do us all a favor, and step away from the computer.

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As a sidenote, you can test palindromic character of strings using a regexp, which is an interesting exercise. I strongly suggest you try by yourself before looking at the spoiler.

Local $pal = "AbcDCBa"

ConsoleWrite(">" & $pal & "< is a palindromic string: " & (StringRegExp($pal, "(?i)^(?:huh2:(.)(?1)\2|)|((.)(?3)\4|.))$") = 1) & @LF)

Note that this possibility now offers you a whole new gameplay, for instance ignoring not only case but non-letters, like in:

Local $hardpal = "A man, a plan, a canal: Panama!"

ConsoleWrite(">" & $hardpal & "< is a significant-english-letter-wise palindromic string: " & (StringRegExp($hardpal, "(?i)^\W*+(?;)(.)\W*+(?1)\W*+\2|)|((.)\W*+(?3)\W*+\4|\W*+.\W*+))\W*+$") = 1) & @LF)

Obtaining the same result with the latter string but without regexp is a real challenge!


This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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