perl -e 'print sort keys %{{map{$_=>1} <>}}' unsorted_redundant_file.t
+xt

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See: Perl Idioms Explained - keys %{{map{$_=>1}@list}} in our Tutorials.

In reply to Re: a way to do 'sort|uniq' by rnahi
in thread a way to do 'sort|uniq' by jch341277

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