From: Carlos <angus@...>
Date: 2006-07-12T21:54:10+09:00
Subject: Re: String#scan puzzlement

Martin DeMello wrote:
> I'm trying to match sequences of capitalised words - can someone
> explain why the second regexp works but not the first?
> 
> irb(main):001:0> a =  "And then we Went to The Next Place to be"
> => "And then we Went to The Next Place to be"
> irb(main):002:0> a.scan /([A-Z]\w+\s+)+/
> => [["And "], ["Went "], ["Place "]]
> irb(main):003:0> a.scan /(?:[A-Z]\w+\s+)+/
> => ["And ", "Went ", "The Next Place "]

Because when you group, scan returns arrays with [$1, $2, $3...], etc., 
but in "to The Next Place to be" =~ /([A-Z]\w+\s+)+/ there is only $1. 
Put the last "+" inside a group.
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