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Madness

StringReplace help

10 posts in this topic

#1 ·  Posted (edited)

Can someone show me an example of how the second parameter of this function is used if you specify a start point? I want to replace a character in a string, but only after a certain position. Not sure I can do this with StringReplace.

Edited by Madness

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#3 ·  Posted (edited)

Got it. It looks like I will need to find the positions of what I want to replace, after a certain point, then loop back through with this.

Edited by Madness

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You can't combine Searchstring and start.

Use something like this

$iStart = 5
$sString = "aaabacadae"
$sSearch = "a"
$sReplace = "?"
$sStringLeft = StringLeft($sString, $iStart - 1)
$sStringRight = StringMid($sString, $iStart)
ConsoleWrite($sStringLeft & StringReplace($sStringRight, $sSearch, $sReplace) & @LF)

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An example of what is to do would be nice

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#6 ·  Posted (edited)

Madness,

You might do something like this...

local $sTestString       = 'ABCDEF_abcdef_ABCDEF_abcdef'
Local $iStartpos         = 27
local $sReplaceChar      = 'X'
local $sCharToReplace    = 'f'

for $1 = $iStartpos to stringlen($sTestString)
    if stringmid($sTestString,$1,1) = $sCharToReplace then $sTestString = stringreplace($sTestString,$1,$sReplaceChar)
Next

ConsoleWrite($sTestString & @CRLF)

kylomas

edit: Please disregard...solutions by water and mikell are much better

Edited by kylomas

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"I like pigs.  Dogs look up to us.  Cats look down on us.  Pigs treat us as equals."

- Sir Winston Churchill

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kylomas,

local $sTestString = 'ABCDEF_abcdef_ABCDEF_abcdef_ABCDEF_abcdef'
Local $iStartpos = 25
local $sReplaceChar = 'X'
local $sCharToReplace = 'f'

Msgbox(0,"", StringRegExpReplace($sTestString, '(?i)(?<=.{' & $iStartpos & '})(.*?)' & $sCharToReplace, "$1" & $sReplaceChar) )

:D

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#8 ·  Posted (edited)

mikell,

Thank you for your help on this.

@Madness - mikell came up with the above gem which I believe is the best solution to your issue!

edit: if this dialog seems disjointed it is because mikell and I have been discussing this offline

Edited by 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

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Prompted to look at this I came up with another solution but it's ugly compared to what mikell offered:

Local $sString = 'ABCDEF_abcdef_ABCDEF_abcdef_ABCDEF_abcdef_ff'

Local $sRes = _ArrayToString(StringRegExp($sString, "(?|^(.{25}[^f]*)|f([^f]*))", 3), "X")
ConsoleWrite($sRes & @LF)

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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kylomas,

A last detail : in case of  $sCharToReplace is a special character, it's better to put the Q...E sequence

StringRegExpReplace($sTestString, '(?i)(?<=.{' & $iStartpos & '})(.*?)\Q' & $sCharToReplace & '\E', "$1" & $sReplaceChar)

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