Regex question (dummy groups)

[Kyan]

 Hi

There's anyway to capture something in regex thats is not matched? (? will only match and not get captured, I want the oposit, be captured and do not matched

example:

/^(http.+/).+?(/myfolder-.+?/).+$(Something I want to be addressed and will spare a bunch of if then lines)/

Edited October 20, 2014 by Kyan

[jchd]

PCRE (AutoIt regexp engine) forcibly matches what it captures. I don't know any regex engine working otherwise.

Nonetheless you can still StringRegExpReplace what you don't want and replace it by the empty string, leaving out what you do want.

An explicit example would help us help you.

[Kyan]

PCRE (AutoIt regexp engine) forcibly matches what it captures. I don't know any regex engine working otherwise.

Nonetheless you can still StringRegExpReplace what you don't want and replace it by the empty string, leaving out what you do want.

An explicit example would help us help you.

I want to match a couple of URL's but for 1 domain I need to add some words, I found this kind of group "(?|)" may come handy to narrow down the output

Comments can't be captured right? since it will return nothing to be matched ((#test))

#include <Array.au3>
$url = "http://www.autoitscript.com/forum/topic/165114-regex-question-dummy-groups/#entry1205349"
$ex = StringRegExp($url,'(?i)^(http://.+?autoit.+)/.+(/topic/\d+).+?((#test))',1)
_ArrayDisplay($ex)
Exit

:/

[mikell]

Outside a comment group (?#...) the # is a normal character

#include <Array.au3>
$url = "http://www.autoitscript.com/forum/topic/165114-regex-question-dummy-groups/#entry1205349"
$ex = StringRegExp($url,'(?i)(http://.+?autoit.+)/.+(/topic/\d+).+?(#.*)',1)
_ArrayDisplay($ex)

[Kyan]

I meant "((?#Some word I want to be capture without matching it))", wasn't talking about the "#" in the url:)

 

Why k doesn't act like in this page http://www.regular-expressions.info/keep.html ?

example:

$url = "http://www.motherinlaw.mygf.com/something"
$ex = StringRegExp($url,'(?i)^(http://www.motherinlaw\k.my.+)/',1)

 

should output ".mygf.com"

[jchd]

You seem to confuse k and K.

Based on your example, you can use "(?i)^http://www.motherinlaw.K(.+)/"

Why do you put the "http://www.motherinlaw" in the capturing group? But then notice that K is useless as the pattern "(?i)^http://www.motherinlaw.(.+)/" works equally well.

Also beware that dot (.) may not work like a literal dot (.)

[Malkey]

Another example for your consideration.

#include <Array.au3>

$url = "http://www.motherinlaw.mygf.com/something"
$ex = StringRegExp($url, '(?i)^.+\K\.my[^/]+', 1) ; Start capturing at ".my" and continue capturing sequencially all non forward slash characters.
_ArrayDisplay($ex)

$ex = StringRegExpReplace($url, '(?i)^(http://www.motherinlaw)|(/.*)$', "") ; Matches characters at the beginning and/or end of the string and replace
;                                                                    with nothing, leaving the non-matched characters in the middle of the string.
ConsoleWrite($ex & @LF)

;Both return
;.mygf.com

[Kyan]

You seem to confuse k and K.

Based on your example, you can use "(?i)^http://www.motherinlaw.K(.+)/"

Why do you put the "http://www.motherinlaw" in the capturing group? But then notice that K is useless as the pattern "(?i)^http://www.motherinlaw.(.+)/" works equally well.

Also beware that dot (.) may not work like a literal dot (.)

Indeed

I always forget to escape dots but works anyways , in PHP what "?" mean?  Is a "" that may or not appear?

EDIT:

 

 

Another example for your consideration.

#include <Array.au3>

$url = "http://www.motherinlaw.mygf.com/something"

$ex = StringRegExp($url, '(?i)^.+K.my[^/]+', 1) ; Start capturing at ".my" and continue capturing sequencially all non forward slash characters.

_ArrayDisplay($ex)

$ex = StringRegExpReplace($url, '(?i)^(http://www.motherinlaw)|(/.*), "") ; Matches characters at the beginning and/or end of the string and replace

;                                                                    with nothing, leaving the non-matched characters in the middle of the string.

ConsoleWrite($ex & @LF)

;Both return

;.mygf.com

 

 

So in regexR I just need to match what I don't want to replace it with nothing, nice

Thank you both, now I'm going to put it to work

 

Edited October 20, 2014 by Kyan