Simple, only sort one thing. Maintaining parallel data structures is a real pain, so don't do that. Instead use either an array of arrays or a hash. Consider:

use strict;
use warnings;

my @items = (["dog", 20], ["desk", 10], ["cow", 150]);

print "By name:\n";
print "$_->[0]: $_->[1]\n" for sort {$a->[0] cmp $b->[0]} @items;

print "\nBy weight:\n";
print "$_->[0]: $_->[1]\n" for sort {$a->[1] <=> $b->[1]} @items;

[download]

and:

use strict;
use warnings;

my %items = (dog => 20, desk => 10, cow => 150);

print "By name:\n";
print "$_: $items{$_}\n" for sort {$a cmp $b} keys %items;

print "\nBy weight:\n";
print "$_: $items{$_}\n" for sort {$items{$a} <=> $items{$b}} keys %it
+ems;

[download]

Both print:

By name:
cow: 150
desk: 10
dog: 20

By weight:
desk: 10
dog: 20
cow: 150

[download]
True laziness is hard work

In reply to Re: Sort array + keep associated indexes in other array by GrandFather
in thread Sort array + keep associated indexes in other array by johnzzz

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