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Matching identical strings in the same line (See related posts)


Note that (\S+) refers to \2 as well as $2.


line = "some strings are identical and some strings are not identical"

line.scan(/(^|\s)(\S+)(?=\s.*?\2)/) { puts $2 }

to ruby regex string by ntk on Sun Feb 05 17:52:27 -0500 2006

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