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how do i sort hash by key numerically

( #62697=categorized question: print w/ replies, xml ) Need Help??
Contributed by Anonymous Monk on Mar 07, 2001 at 13:38 UTC
Q&A  > hashes


Description:

if i have
%hash={ 89=>3, 45=>2, 1 =>5, 40=>3}
i want the output as
1=>5, 40=>3, 45=>2, 89=>3}
how do i do it.

Answer: how do i sort hash by key numerically
contributed by arhuman

for $key ( sort {$a<=>$b} keys %hash) { print "($key)->($hash{$key})\n"; }
Answer: how do i sort hash by key numerically
contributed by Jouke

This would do the trick:

#!/usr/bin/perl -w %hash=( 89=>3, 45=>2, 1 =>5, 40=>3); foreach (sort { $a <=> $b } keys(%hash) ) { print "key: $_ value: $hash{$_}\n" }
Jouke Visser, Perl 'Adept'

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