I tried: 
#!c:\perl\bin\perl.exe -w

use strict;
use warnings;
use diagnostics;

my @a;

$a[1]{total} = 10;
$a[2]{total} = 50;
$a[3]{total} = 40;
$a[4]{total} = 30;
$a[5]{total} = 20;

my @b = map { $_->[1] }
            sort { $b <=> $a }
            map { [ $a[ $_ ]->{total}, $_ ] } 0..$#a;

for my $x (0..$#b)
{
    print "$b[$x] = $a[$b[$x]]{total}\n";
}

[download]
And the output was: 
5 = 20
4 = 30
3 = 40
2 = 50
1 = 10
Use of uninitialized value in concatenation (.) or ...
0 =

[download]
I understand the waring since the code refers to element 0 of the array @a when it was never defined. However the output is not what I expected. I was looking for: 
2 = 50
3 = 40
4 = 30
5 = 20
1 = 10

[download]

In reply to Re: Re: Indexing a data structure by ChrisR
in thread Indexing a data structure by ChrisR

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