From: Daniel Finnie <danfinnie@...>
Date: 2006-12-07T07:38:10+09:00
Subject: Why is this regex invalid?

irb(main):002:0> regex = /([0-9]*)([^\+- ]+)(.*)/
SyntaxError: compile error
(irb):2: invalid regular expression: /([0-9]*)([^\+- ]+)(.*)/
         from (irb):2

irb(main):003:0> regex = /([0-9]*)([^\+ -]+)(.*)/
=> /([0-9]*)([^\+ -]+)(.*)/

The only thing that it different in the 2 regexps is the placement of 
the space in the square brackets, yet the first regexp is invalid and 
the 2nd valid.

Why is this?

Thanks,
Dan