BioNrd has asked for the wisdom of the Perl Monks concerning the following question:
I am interested in creating a hash of hashes that will contain variables that are set by the user.
I have put this together to create a hash of a variable (population size, @total) that is sent into this subroutine. $tester is also sent into the array and is the number of populations that the user creates.
sub splitter { my %hasher = (); my $increase = 0; my $input = ""; while ($tester--) { $increase ++; push @key, $increase; } @hasher{@key} = @total; foreach $key (sort { $a <=> $b } keys %hasher) { print "Population #$key = $hasher{$key}\n"; } while () { print "Enter the population you will act on: "; chomp ($input = <STDIN>); $output = $hasher{$input}; #references a specific value in the + hash. print "$output BEFORE \n"; $output = $output + 8; print "$output AFTER\n"; $hasher{$input} = $output; #returns the modified value to the +hash foreach $key (sort { $a <=> $b } keys %hasher) { print "Population #$key = $hasher{$key}\n"; } return $output; } }
Later in the code, I take the $output value and turn it into an array that is modified, and i want to then return it to the hash in the following format:
A: Population number
1. Listing of individuals from 1…n (user defined) ie. @array = (1 … $population);
2. Listing of genetic marker associated with each individual (not yet coded)
The other thing I wanted to do, is be able to modify the arrays at the lower level of the hash, as I have done for my simple hash above. Something I have no idea how to do.
I have only been at this two weeks, and this is my first attempt at programming. Any help on any aspect of this post would be greatly appreciated. Thanks monks!
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Re: Hash of Hashes
by snopal (Pilgrim) on Oct 08, 2007 at 13:13 UTC |