From: Jason Williams <jason@...>
Date: 2003-12-18T04:32:02+09:00
Subject: Re: gsub question

On 2003-12-17, Daniel Bretoi <lists@debonair.net> wrote:
> perl -e '$a="hello hi hello";$a =~ s/(\w+)/$1a/g;print $a; '
> helloa hia helloa
>
> ruby -e 'a="hello hi hello";a.gsub!(/(\w+)/,"#{$1}a"); puts a'
> a a a
>

The interpolation (AIUI) is done before the string gets passed to
gsub!, so gsub! sees just the string "a". I think you want

a="hello hi hello";a.gsub!(/(\w+)/,'\1a'); puts a