From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-06-18T16:35:07+09:00
Subject: Re: regex: splitting conditionally on |

computorist wrote:
> I'm parsing mediawiki markup and I'd like to split a multi-line string
> on | (vertical-bar), but only if it isn't contained w/in another
> pattern.
>
> | name1 = value1
> | name2 = value2 | name3 = value3
> | name4 = [[foo|bar]]
>
> I'd like String.split(/pattern/) to return ['name1 = value1','name2 =
> value2','name3 = value3','name4 = [[foo|bar]]']
>
> I've working on a negative look-ahead pattern without success and my
> brain is tired.
>
> Thanks for any suggestions

str.split /\s*\|\s*(?=\s*\w+\s*=)/
I don't know whether this exactly meets your requirement, but this will split 
only on |s that are followed by a word and a =. For your sample input that 
gives the desired result.

HTH,
Sebastian
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