in reply to incrementing mixed letters and numbers
variations_with_repetition in module Algorithm::Combinatorics also does what you want:
use strict; use warnings; use Algorithm::Combinatorics 'variations_with_repetition'; my @data = (0..9,'a'..'z'); my $iter = variations_with_repetition( \@data, 4 ); while( my $c = $iter->next ) { print "@$c\n"; }
It does end though when it reaches 'zzzz'.
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