Hi Ram,
On Wed, 24 Aug 2011 20:24:00 +0530
Ramprasad Prasad <ramprasad...@gmail.com> wrote:
> Assume I have to find the first unique character in a string
>
In that case, use a hash. Is there any reason you want to do it using a regex?
Regards,
Shlomi Fish
> $string = "abtable";
>
> # t is the first unique string
>
> I tried using a negative backtrace lookup to get the answer in a
> single regex ... But something is missing.
>
> /(.).(?!\1)/ && print $1;
>
> it seems fine ... But doesn't work
>
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