From: Daniel Sheppard <daniels@...>
Date: 2007-11-01T14:38:17+09:00
Subject: Re: String#split and groups in the field separator RE

> Is this expected behaviour? I haven't seen anything related to this
> mentioned in the API docs...
> 
> irb(main):060:0> s.split(/(:)+/)
> => ["a", ":", "b", ":", "c", ":", "d"]			

Yes, any capture groups in the regex will be included in the split
array. If you want to use groups without capturing it into the split
array, use a non-capturing group - ie, /(?=,)/ rather than /(,)/

It is curious that it's not in the api doc... I must have learnt it from
somewhere...

Dan.