Hi,
I was just wondering why you'd not use a hash in a hash? I'd propose the following:
#!/usr/bin/perl
use strict;
use warnings;
my $string = {
index1 => { index11 => 4 },
index2 => { index21 => 3 , index22 => 2 },
index3 => { index31 => 1 }
};
for my $i (sort keys %$string) {
my $tmp = $string->{$i};
for my $j (sort keys %$tmp) {
print $i . " " . $j . " " . $string->{$i}->{$j} . "\n";
}
}
index1, index2, index3 and so on are just names I made up to fill the hash with something. You can replace them with your E1's, E2's, etc... The nested for loops sort in ascending order.
The hash in a hash for gives the following output:
index1 index11 4
index2 index21 3
index2 index22 2
index3 index31 1
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