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Thanks for that tip, JavaFan. I used it, and you are so right. It is much faster and my memory doesn't run out! Unfortunately, I did come against another error "Range iterator outside integer range". I haven't quite got that figured just yet.

I didn't use your exact fragment, but I think it is close enough.

#!/usr/bin/perl -l use strict; use warnings; use feature qw(say); use List::Util qw(sum max); use lib 'lib'; use Base::Nifty qw(commify); say "How many children are in the first generation?"; my $generation = <>; say "How many generations do you want to generate?"; my $generations = <>; chomp($generation,$generations); my %generations = ( 1 => $generation, ); my @distribution = (0,0,0,1,1,1,2,2,2,3,3,4,5,6); for my $gen (1..$generations) { my $children = 0; for (1..$generation) { $children += $distribution[rand(@distribution)]; } $generation = $children; last if ($children == 0); $generations{$gen + 1} = $generation; } my $max_length_generation = length(commify(max(keys %generations))); my $max_length_children = length(commify(max(values %generations))); for (sort {$a <=> $b} keys %generations) { printf "%${max_length_generation}s: %${max_length_children}s\n",$_,c +ommify($generations{$_}); }

The += did a whole lot of good! I haven't used that construction much in the past, so I don't automatically think of it. Hopefully one day it will sink in.

Have a cookie and a very nice day!
Lady Aleena

In reply to Re^2: A script with a loop is running my computer Out of memory by Lady_Aleena
in thread A script with a loop is running my computer Out of memory by Lady_Aleena

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