From: Ross Shaw <rshaw1961@...>
Date: 2001-11-30T06:35:22+09:00
Subject: [ruby-talk:26969] How to match '|' but not '\|'

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

Thanks

Ross