From: Stefano Crocco <stefano.crocco@...>
Date: 2008-01-11T06:38:51+09:00
Subject: Re: search pattern

Alle giovedì 10 gennaio 2008, Li Chen ha scritto:
> Hi all,
>
> I have a Ruby script as follow. What I try to do is to find a pattern in
> the string and report its position. I wonder how to get the position of
> pattern in the string.
>
> Thank you in advance,
>
> Li
>
>
>
> seq="5'aaaAAAAAACCCCCCCCTTTTTTTGGGGGGGGG-3'"
>
> seq.upcase!# change to upper case
> puts "old sequence:"
> puts seq.gsub!(/[^A-Z]/,'')# extract the string
> puts pattern if seq=~/AC/
>
> #how to get the position of pattern in the string?

String=~ returns the position of the starting of the match, so

seq=~pattern

will return what you want.

Stefano