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 push @x, pack "A*", qq[@$_] while $_=$i->next;

That would probably match if not beat join, if you weren't stringifying the array twice.

Ie. Use  push @x, pack "(A*)*", @$_ while $_=$i->next;

Of course, if you want to put all the sequences as strings into an array, this is easier and probably quicker;

my @x = map join( '', @$_ ), variations_with_repetition( ["a".."z"], 4 + );; print scalar @x;; 456976

And if all you want to do is print the count, then:

[ 7:10:21.87] C:\test>perl -MAlgorithm::Combinatorics=:all -le"print s +calar( () = variations_with_repetition( ["a".."z"], $ARGV[0] ) )" 4 456976 [ 7:10:27.12] C:\test>

BTW, that is one seriously quick machine you're running. What is it? (6x faster than my (admittedly ancient) box.


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In reply to Re^7: list of four digit lock combinations without repeated digits by BrowserUk
in thread list of four digit lock combinations without repeated digits by Lotus1

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