If all you are doing is printing a list of unique words from stdin, why not save a lot of wasted code and do:

print "$_\n" for sort <> =~ /\b(\S+)\b(?!.*\b\1\b)/g

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That is, use a negative lookahead to check the word doesn't appear again. Saves you joining, splitting, grepping, and mapping :). I have not benchmarked it, though.

In reply to Re: promoting array to a hash by Jasper
in thread promoting array to a hash by sleepingsquirrel

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