From: Craig Jolicoeur <cpjolicoeur@...>
Date: 2009-04-29T22:16:06+09:00
Subject: Re: Issue with regexp pattern matcher withing String#gsub

Heesob Park wrote:
> 2009/4/29 Craig Jolicoeur <cpjolicoeur@gmail.com>:
>> ## to
>> ##  from (irb):84
>>
>> html_string.gsub!( /src=(["'])\S+\?\d*\1/ ) { |s| s.split('?').first +
>> $1 }
>>
>> ## the question is why can I do string concat with + $1 in the first
>> regexp and
>> ## why am I unable to do it in the second regexp where doing str + $1
>> throws the error??
> The side effect of String#split is changing the value of $1.
> 
> You can work acound like this:
> html_string.gsub!( /src=(["'])\S+\?\d*\1/ ) {|s| t=$1;s.split('?').first 
> + t }
> 
> Regards,
> 
> Park Heesob

ahh, interesting.  thanks so much.  I didn't realize that #split would 
overwrite those methods.

What exactly does the split function set them to?
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