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SeanRoberts/gist:966479

Created May 11, 2011 13:56
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gistfile1.txt
>> regex = %r{^[A-Za-z]?[0-9]+$}
>> "11209520".match(regex)
=> #<MatchData "11209520">
>> "A11209520".match(regex)
=> #<MatchData "A11209520">
>> "AA11209520".match(regex)
=> nil
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