Oh, and here is my attempt (not golfed): 
sub is_straight {
    my ($low,$high,$high_no_ace) = @_;
    return $low==2 ? 
      ($high == 14 ? ($high_no_ace==5) : ($high == 6) ) :
      ($high-$low) == 4;
}
    
my %tr = (J => 11,Q => 12, K => 13, A => 14); 
@hand = map {s/^([JQKA])/$tr{$1}/;$_} @hand;


my %suits;
my %ranks;

my $num_suits;
my $num_ranks;
my $low_rank = 100;
my $high_rank = 0;
my $high_rank_no_ace = 0;

foreach my $card (@hand) {
    my ($r,$s) = $card =~ /(\d+)(.)/;
    if ($suits{$s}++ == 0) {$num_suits++}
    if ($ranks{$r}++ == 0) {$num_ranks++}
    $low_rank = min($r,$low_rank);
    $high_rank = max($r,$high_rank);
    $high_rank_no_ace = max($r,$high_rank_no_ace) unless $r == 14;
}
my @nranks = sort map {$ranks{$_}} keys %ranks;

my $hand = 'high card';
{
    ($hand = 'straight flush',last) 
       if $num_suits==1 && is_straight($low_rank,$high_rank,$high_rank
+_no_ace);
    ($hand = 'four of a kind',last) if $nranks[1]==4;
    ($hand = 'full house',last) if $nranks[1]==3;
    ($hand = 'flush',last) if $num_suits==1;
    ($hand = 'straight',last) 
      if $num_ranks == 5 && is_straight $low_rank,$high_rank,$high_ran
+k_no_ace);
    ($hand = 'three of a kind',last) if $nranks[2]==3;
    ($hand = 'two pair',last) if $nranks[2]==2;
    ($hand = 'pair',last) if $nranks[3]==2;
}

[download]


-pete
"Worry is like a rocking chair. It gives you something to do, but it doesn't get you anywhere."

In reply to Re: Golf/Elegance: Poker Hands by dreadpiratepeter
in thread Golf/Elegance: Poker Hands by dreadpiratepeter

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