Greetings Monks,
I wanted to sort an array of hashes based on the size of each hash (i.e., the number of the key/value pairs in each hash) using something like:
#!/usr/bin/perl

use strict;

my @AoH = (
       {a => 1,  b  => 2,  c  => 3},
       {a => 1,  b  => 2},
       {a => 1,  b  => 2,  c  => 3,  d  => 4},
       {a => 1}
);

my @AoH_sorted = sort { keys(%{$AoH[$b]}) <=> keys(%{$AoH[$a]}) } @AoH
+;

foreach my $i (0 .. $#AoH_sorted) {
  print "$i\t";
  if (exists  $AoH_sorted[$i]) {
    my %hash = %{$AoH_sorted[$i]};
    foreach my $key (keys %hash) {
      print "$key\t";
    }
  }
  print "\n";
}

[download]
However the above script produces the following output which obviously has not been sorted: 
0       c       a       b
1       a       b
2       c       a       b       d
3       a

[download]
Any ideas on how to get this sort to work? Thanks!

In reply to Sorting an array of hashes by Boghog

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