Re: vim: how to use back reference to compare strings?

thanks. yes I know we can use that way(/1 /2 ..etc).

what I meant is, how to use these to actually do the compare in a vim ex command line?

sth like :

:g#\(abc\d\+) bla bla \(abc\d\+\)#if /1 != /2 then echo "found a diff !"

of course this doesn't work but just some fake code to clarify what I meant

On Sat, Aug 10, 2013 at 3:30 AM, Marcin Szamotulski <mszamot@gmail.com> wrote:

Hi,

I am not sure if I understand you correctly but you can use \(...\) and
and then reuse it with \1 (it matches the same string as what \(...\)
have matched).

Regards,
Marcin

On 00:44 Sat 10 Aug     , ping song wrote:
> hi guys:
> I run into a scenario that , I need to compare 2 part of the regex string
> in one line :
>
> "abc123456 bla bla bla abc1234"
>
> so I'm thinking, can we use the backreference, to compare the first abc\d\+
> with the second one and only print out a message in case we detect the
> different ones ? preferably if this can be done with one command...
>
> thanks!
>

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