There's a whole lot going on in that one line ... including one of Perl's most pragmatic features, "auto-vivification." New words are automatically inserted into the $words array (with value 0) if they do not yet exist there. Much easier to do in Perl than with most other languages.

In reply to Re^2: regex, find words that occur more than once. by Anonymous Monk
in thread regex, find words that occur more than once. by Anonymous Monk

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