From: Trish Ball <trish.ball@...>
Date: 2007-01-04T00:14:04+09:00
Subject: Problems with Sting#sub and regular expressions

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I have been working on an expression using String#sub and am getting
inaccurate results on the first time I run the expression, but not on the
following times I run it.  Is there something wrong with my regular
expression?

The intent of my regular expression is to remove preceding spaces and
apostrophes.

irb(main):001:0> " ' Helen".sub(/^(['\s]*)(.*)/, "#{$2}")
=> ""
irb(main):002:0> " ' Helen".sub(/^(['\s]*)(.*)/, "#{$2}")
=> "Helen

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