I like stooge sort more. It can be much more efficient: I used functional-programming techniques which means it can be trivially parallelised over many CPUs.

sub stoogesort {
    my (@lst) = @_;

    if ($lst[-1] < $lst[0]) {
        # swap
        @lst[0, -1] = @lst[-1, 0];
    }

    return @lst if (@lst < 3);

    # thirds
    my $zero  = 0;
    my $one   = int(@lst / 3);
    my $two   = int($#lst * 2 / 3);
    my $three = $#lst;

    for my $range (
        [ $zero .. $two   ],
        [ $one  .. $three ],
        [ $zero .. $two   ] ) {
        @lst[ @$range ] = stoogesort( @lst[ @$range ] );
    }

    return @lst;
}

my @list = (1, 2, 3, 9, 6, 4, 5, 7, 0);

print join(" ", stoogesort(@list)), "\n";

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In reply to Re^2: how to sort string in perl by Anonymous Monk
in thread how to sort string in perl by Priti24

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