From: Giampiero Zanchi <cidza@...>
Date: 2010-10-06T23:04:35+09:00
Subject: Re: The beauty of Ruby through examples

find the first gap in array of fixnum values

p [1,2,3,5,6,8,9,10].inject {|a, e| e == a.next ? e : (break a.next)}

will produce 4
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