I rearranged your structure a little bit, for clarity, and you are awfully close to sorting it. For example:

#!/usr/bin/perl -w
use strict;

my @array = ( { name => "proteobacteriai", 
                size => 30 },
              { phylum => "alphabacteria",  
                size => 50 },
              { name => "cytophaga",   
                size => 10 },
);
for (@array) {
    print "Size (out of order) = ",$_->{size}, "\n";
}

my @newarray = sort { $a->{size} <=> $b->{size} } @array;

for (@newarray) {
    print "Size = ",$_->{size}, "\n";
}

[download]
yields

C:\Code>perl sort_aoh.pl
Size (out of order) = 30
Size (out of order) = 50
Size (out of order) = 10
size = 10
size = 30
size = 50

[download]

In reply to Re: How to sort by the key value of an Array of Hash structure? by dwm042
in thread How to sort by the key value of an Array of Hash structure? by Jordy224

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