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Re: Sorting a hash. What am I doing wrong?

by Arien (Pilgrim)
on Jan 14, 2003 at 00:45 UTC ( #226674=note: print w/replies, xml ) Need Help??


in reply to Sorting a hash. What am I doing wrong?

Its name suggests that @uniq should be filled like this:

my @uniq = sort { $a <=> $b } grep { $seen{$_} == 1 } keys %seen;

In other words: get the keys that occur only once and sort them numerically.

— Arien

Replies are listed 'Best First'.
Re: Re: Sorting a hash. What am I doing wrong?
by zakb (Pilgrim) on Jan 14, 2003 at 16:19 UTC

    A hash's keys are always unique.

    #!/usr/bin/perl -w use strict; my %hash = ( key1 => '1', key1 => '2' ); print join("\n", keys %hash);

    prints 'key1' only...

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