The perlfaq suggests a Fisher-Yates shuffle:
sub fisher_yates_shuffle {
my $array = shift;
my $i;
for ($i = @$array; --$i; ) {
my $j = int rand ($i+1);
next if $i == $j;
@$array[$i,$j] = @$array[$j,$i];
}
}
fisher_yates_shuffle( \@array );
This, walks backwards through the array (thus avoiding the repetition problem), swapping cards randomly. I would call this on your deck and then, depending on your card game, treat @deck as a queue.
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