From: Benoit Cerrina <benoit.cerrina@...>
Date: 2001-11-30T07:15:25+09:00
Subject: [ruby-talk:26974] Re: How to match '|' but not '\|'


"Ross Shaw" <rshaw1961@yahoo.com.au> wrote in message
news:qJxN7.386812$bY5.1671783@news-server.bigpond.net.au...
> 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
I'm not sure what the syntax
actual = 'Split|me|up\|into|four' (/??????/)

is supposed to be
but my best guess has been
actual = 'Split|me|up\|into|four'.scan(/[^|\\]*(?:\\\|[^|\\]*)*/)

Benoit

actual.scan(/[^|\\]*(?:\\\|[^|\\]*)*/)