From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-12-16T21:09:50+09:00
Subject: Re: Help with an "easy" regular expression substitution

Mark Thomas wrote:
> excuse me...
>
> header.tr('*','X')
>
> Better? :)

No, because you just changed the problem. The specified input was the whole 
string, not only the part of the string that should change. And the desired 
output was that whole string with the part that should be changed, changed 
and the rest as-is.
You could of course do
text.sub(/X-Level: \*+/) {|header| header.tr("*","X") }
but that's not neccessarily simpler than the already offered solutions.

HTH,
Sebastian
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