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Re: printing largest hash value

by saskaqueer (Friar)
on Feb 22, 2005 at 03:13 UTC ( #433233=note: print w/replies, xml ) Need Help??


in reply to printing largest hash value

There's probably a better solution to this, but the coffee isn't holding out for my brain right now:

#!/usr/bin/perl -w use strict; my %hash = ( red => 2, pink => 1, orange => 4, black => 3, blue => 4 ); my %reverse; while ( my ($k, $v) = each %hash ) { push( @{$reverse{$v}}, $k ) } my @highest = @{ @reverse{ ( sort { $b <=> $a } keys %reverse )[0] } }; print join(', ', @highest), $/;

If you also need to know the value of the keys that have the highest value, here's a little rewrite that also makes the whole operation look simpler:

#!/usr/bin/perl -w use strict; my %hash = ( red => 2, pink => 1, orange => 4, black => 3, blue => 4 ); my %reverse; while ( my ($k, $v) = each %hash ) { push( @{$reverse{$v}}, $k ) } my $high_val = ( sort { $b <=> $a } keys %reverse )[0]; my @highest = @{ $reverse{$high_val} }; print "highest value: $high_val\n", "keys with this value: ", join(', ', @highest), "\n";

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