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Re: Re: Re: Perl Idioms Explained - keys %{{map{$_=>1}@list}}

by RMGir (Prior)
on Aug 04, 2003 at 20:28 UTC ( #280791=note: print w/replies, xml ) Need Help??


in reply to Re: Re: Perl Idioms Explained - keys %{{map{$_=>1}@list}}
in thread Perl Idioms Explained - keys %{{map{$_=>1}@list}}

Adding 
'keys_map_undef' => sub { my @uniq = keys %{{ map {$_ => undef} @list 
+}}; },

[download]
to test the undef suggestion, it turns out to be 15-20% faster than using 1.

grep still wins, though.
--
Mike

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