I am still struggling with the hash of hash business. I want to keep a record of randomly generated data in a hash so that it is kept with its population of origin. Here is what I have so far: 
@populations = (4);
    
&gener();    
    
sub gener {    
    foreach ($populations) {
        @chroma = (0...10);
        @chromb = (0...10);
        @ind = (0...10);
        %HoH = (
            @populations => {
                individual   => "@ind",
                chromasome1  => "@chroma",
                chromosome2  => "@chromb",
            },
        );
    }
    for $population ( sort keys %HoH ) {                        
        for $info ( sort keys %{ $HoH{$population} } ) {            
            print "$population: $info=$HoH{$population}{$info} ";     
+           
        }                                                            
    print "\n";                                                    
    }    
    
use Data::Dumper;
print Dumper(%HoH);
}

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But for the life of me I cant get it to work properly! It only populates the hash with #4. I want 4 hashes each with its own data (@chroma, @chromb, @ind will be created for each @population). Therefore I throw myself on the mercy of the wise monks!

Once this is working I also need a way to reference @chroma, @chromb, @ind for each population to modify them.

Thanks for your help!

In reply to Hash of Hash Redux by BioNrd

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