I have an issue that I need to loop over a hash that has three keys. I have written code to loop over two keys before but for some reason I am struggling with this task. Example of code used to loop over two key hash 
foreach my $key1 (sort keys %hash){
    foreach my $key2 (sort keys %{$hash{$key1}}){
        print "$key1\t$key2\t$hash{$key1}{$key2}\n";
    }
}

[download]
I really think the three key structure is best for this task as I have a very complicated structure. 
foreach my $key1 (sort keys %hash){    
    foreach my $key2 (sort keys %{$hash{$key1}} ){
        foreach my $key3 (sort keys  %{$hash{$hash{$key1}} }       ){
            print OFH "$key1\t$key2\t$key3\t$hash{$key1}{$key2}{$key3}
+\n";
        }
    }
}

[download]
Thanks

In reply to Hash with three keys by Jeri

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