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RegExpReplace -- Remove whitespace Before lines of text

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Hello all B)

For the past week or so, I've been learning & messing around with Regular Expressions.

Despite the amount that I've learned throughout this time, I seem to be having an issue with what would seem to be a simple task..

I'm trying to remove gaps of Whitespace that sit in Front of text, as well as empty lines between lines of text.

Here's the expression that I've come up with thus far:

(?is)(?<=^)\s*(?=\w)*

The logic that I'm shooting for is:

Grab 0 or More Whitespaces - between [HAT] and the 1st word Character - and do that 0 or More times.

 

Here's a simple sample code I put together:

$text = "   This is Line 1" & @CRLF & _
"           " & @CRLF & _
"                   " & @CRLF & _
"               This is Line 4  " & @CRLF & _
"                           " & @CRLF & _
"       " & @CRLF & _
"                                                                           This is Line 7" & @CRLF & _
"                                   " & @CRLF & _
"               " & @CRLF & _
"           This is Line 10                 " & @CRLF & _
"   " & @CRLF & _
"                   " & @CRLF & _
"                                       This is Line 13"


$text = StringRegExpReplace($text, "(?is)(?<=^)\s*(?=\w)*", "")

ConsoleWrite($text)

 

After running the code, the gap of Whitespace in front of "This is Line 1" gets removed..

But all other gaps of whitespace remain in place.

 

Does anyone have any ideas on what might be the issue here?

 

Any tips or hints would be greatly appreciated :)

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remove the leading spaces, and then any two whitespaces (or more) in a row replace with a single LF?

$text = "   This is Line 1" & @CRLF & _
"           " & @CRLF & _
"                   " & @CRLF & _
"               This is Line 4  " & @CRLF & _
"                           " & @CRLF & _
"       " & @CRLF & _
"                                                                           This is Line 7" & @CRLF & _
"                                   " & @CRLF & _
"               " & @CRLF & _
"           This is Line 10                 " & @CRLF & _
"   " & @CRLF & _
"                   " & @CRLF & _
"                                       This is Line 13"

$text= StringRegExpReplace(StringStripWS($text , 1) , "(\s\s+)" , @LF)

ConsoleWrite($text)

 

Edited by iamtheky

,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

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@iamtheky

In order to achieve what I was looking for, I just had to change @LF to @CRLF. 

But aside from that, that's exactly what I was looking for!

Thanks for the quick reply & help on that. Very much appreciated my friend! B)

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Try that as well:

$text = "   This is Line 1" & @CRLF & _
"           " & @CRLF & _
"                   " & @CRLF & _
"               This is Line 4  " & @CRLF & _
"                           " & @CRLF & _
"       " & @CRLF & _
"                                                                           This is Line 7" & @CRLF & _
"                                   " & @CRLF & _
"               " & @CRLF & _
"           This is Line 10                 " & @CRLF & _
"   " & @CRLF & _
"                   " & @CRLF & _
"                                       This is Line 13"

$text = StringRegExpReplace($text, "(?m)^\R|^\s+(?=\S)", "")
ConsoleWrite($text & @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.

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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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Hey @jchd

 

Thanks for jumping in with that. You have a couple things in there that I hadn't learned yet -- (?m) and \R

So, if I'm understanding that correctly..

(?m) switched on MultiLine.

Then, it matches any Empty lines .. ^\R

OR

it matches any whitespace that's between [HAT] and anything that's NOT a whitespace .. (?=\S)

And then of course replaces them with ""

 

Very interesting. Thanks again for that. Much appreciated!! :D

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Good reading.

For a full, strict and correct explanation of a PCRE-compatible regex in verbose plain English you can use http://regex101.com/ which also offers a useful step-by-step debugging feature.

Sidenote: AutoIt PCRE implementation sets \R to match LF or CR or CRLF. That can be changed at runtime (see help).


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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With the regex search string „(?m)^\R|^\s+(?=\S)|\h*$“ you can delete all horizontal whitespaces between the last word in line and the line end.

Simpel


SciTE4AutoIt = 3.7.3.0   AutoIt = 3.3.14.2   AutoItX64 = 0   OS = Win7Pro SP1   OSArch = X64   Language = 0407/german
H:\...\AutoIt3\SciTE     H:\...\AutoIt3      H:\...\AutoIt3\Include     (H:\ = Network Drive)

   88x31.png  Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind.

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