regex (backreference)

[ouadji]

hello,

How to have the "opposite" of a reference ?

(sorry for my bad english, i do my best)

(3)[^3] matches "32", "3a" ...

I would like to replace the second term < [^3] > by a reference to the first term < (3) >   ....   ...\1 instead of [^3]

The problem is the " ^ " ... and obviously, (3)[^\1] does not work !

in other words, all except  " \1 "

is there a way to do that ?

Thanks to all,

[apok]

show us an example input string....and what results you want from it?

Also, look at "regular expressions board"

[ouadji]

thank you Apok,

but i don't need a particular/specific résult from a input string ...
it's not the purpose of my question.

i'm learning the regular expressions, and i just asked myself this question

is it possible to have the opposite of a reference ?
all exept this reference ... is there a way with PCRE to do that ?

[Yamaeda]

---

@ouadji wrote:

hello,

How to have the "opposite" of a reference ?

(sorry for my bad english, i do my best)

(3)[^3] matches "32", "3a" ...

I would like to replace the second term < [^3] > by a reference to the first term < (3) >   ....   ...\1 instead of [^3]

The problem is the " ^ " ... and obviously, (3)[^\1] does not work !

in other words, all except  " \1 "

is there a way to do that ?

Thanks to all,

---

(3)[^\1] seems to work if you use Match Regular Expression and not Search and replace.

See attached.

/Y

[ouadji]

Yes, i use "Match regular expression" (and not Search and Replace)

but (.)[^\1] in your attached Vi does not work (with LV 2013)

with an input string "3313" , (.)[^\1] matches "33" .. this is not the good résult ...

it should match "31" ( 3 and all exept 3 )

it works for you with LV2011 ???

[Yamaeda]

You're right, it only matches the 2 first chars regardless!

If you change it to "(.)[\1]" it should get the first instance of double characters, which it also doesn't.

/Y

[ThiCop]

Hello Ouadji,

While checking out this question I saw that it might be linked to a question in the BreakPoint section.

I'm just going to refer to it from over here to close the loop:
http://forums.ni.com/t5/BreakPoint/Regular-Expressions-Board/td-p/1187799/page/13