G'day jdlev,
Here's an example using recursion.
You'll need to modify this depending on what you want to do in the innermost loop: I just print the values.
Also note that I've used 'sort keys %hash' to get consistent output;
you may not need the additional overhead of sorting (in this case, just use 'keys %hash').
#!/usr/bin/env perl
use strict;
use warnings;
my %x = ( a => 1, b => 2 );
my %y = ( c => 3, d => 4 );
my %z = ( e => 5, f => 6 );
multi_for([\%x, \%y, \%z]);
sub multi_for {
my ($hashes, $values, $index) = @_;
$values = [] unless defined $values;
$index = 0 unless defined $index;
if ($#$hashes >= $index) {
my %hash = %{$hashes->[$index]};
for (sort keys %hash) {
multi_for($hashes, [@$values, $hash{$_}], $index + 1);
}
}
else {
# Do something with $values, e.g.
print "@$values\n";
}
}
Output:
1 3 5
1 3 6
1 4 5
1 4 6
2 3 5
2 3 6
2 4 5
2 4 6
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