From: Michael Neumann <neumann@...>
Date: 2001-11-30T07:46:25+09:00
Subject: [ruby-talk:26987] Re: How to match '|' but not '\|'

Ross Shaw wrote:
> I'm a bit of a nuby to regular expressions so I need a little assistance.
> 
> I have a string that I want to split into separate words that are separated
> by the pipe character '|'. However I do NOT want to split at points where
> the pipe is preceded by a backslash '\|'.
> 
> Here's a quick unit test. Can you fill in the missing regexp?
> 
> def test_string_split
>     actual = 'Split|me|up\|into|four' (/??????/)
>     expected = %w[Split  me  up\into   four]
>     assert_equals(expected, actual)
> end

Try this:

  actual.scan(/((\\.|[^|])+)/).map{|t| t[0]}

Regards,

  Michael

-- 
Michael Neumann
merlin.zwo InfoDesign GmbH
http://www.merlin-zwo.de