Poker hand analyser
You are encouraged to solve this task according to the task description, using any language you may know.
- Task
Create a program to parse a single five card poker hand and rank it according to this list of poker hands.
A poker hand is specified as a space separated list of five playing cards.
Each input card has two characters indicating face and suit.
- Example
-
- 2d (two of diamonds).
Faces are: a, 2, 3, 4, 5, 6, 7, 8, 9, 10, j, q, k
Suits are: h (hearts), d (diamonds), c (clubs), and s (spades), or
alternatively, the unicode card-suit characters: ♥ ♦ ♣ ♠
Duplicate cards are illegal.
The program should analyze a single hand and produce one of the following outputs:
straight-flush four-of-a-kind full-house flush straight three-of-a-kind two-pair one-pair high-card invalid
- Examples
2♥ 2♦ 2♣ k♣ q♦: three-of-a-kind 2♥ 5♥ 7♦ 8♣ 9♠: high-card a♥ 2♦ 3♣ 4♣ 5♦: straight 2♥ 3♥ 2♦ 3♣ 3♦: full-house 2♥ 7♥ 2♦ 3♣ 3♦: two-pair 2♥ 7♥ 7♦ 7♣ 7♠: four-of-a-kind 10♥ j♥ q♥ k♥ a♥: straight-flush 4♥ 4♠ k♠ 5♦ 10♠: one-pair q♣ 10♣ 7♣ 6♣ q♣: invalid
The programs output for the above examples should be displayed here on this page.
- Extra credit
- use the playing card characters introduced with Unicode 6.0 (U+1F0A1 - U+1F0DE).
- allow two jokers
- use the symbol joker
- duplicates would be allowed (for jokers only)
- five-of-a-kind would then be the highest hand
- More extra credit examples
joker 2♦ 2♠ k♠ q♦: three-of-a-kind joker 5♥ 7♦ 8♠ 9♦: straight joker 2♦ 3♠ 4♠ 5♠: straight joker 3♥ 2♦ 3♠ 3♦: four-of-a-kind joker 7♥ 2♦ 3♠ 3♦: three-of-a-kind joker 7♥ 7♦ 7♠ 7♣: five-of-a-kind joker j♥ q♥ k♥ A♥: straight-flush joker 4♣ k♣ 5♦ 10♠: one-pair joker k♣ 7♣ 6♣ 4♣: flush joker 2♦ joker 4♠ 5♠: straight joker Q♦ joker A♠ 10♠: straight joker Q♦ joker A♦ 10♦: straight-flush joker 2♦ 2♠ joker q♦: four-of-a-kind
- Related tasks
11l
F analyzeHandHelper(faceCount, suitCount)
V
p1 = 0B
p2 = 0B
t = 0B
f = 0B
fl = 0B
st = 0B
L(fc) faceCount
S fc
2 {I p1 {p2 = 1B} E p1 = 1B}
3 {t = 1B}
4 {f = 1B}
L(sc) suitCount
I sc == 5
fl = 1B
I !p1 & !p2 & !t & !f
V s = 0
L(fc) faceCount
I fc != 0
s++
E
s = 0
I s == 5
L.break
st = (s == 5) | (s == 4 & faceCount[0] != 0 & faceCount[1] == 0)
I st & fl {R ‘straight-flush’}
E I f {R ‘four-of-a-kind’}
E I p1 & t {R ‘full-house’}
E I fl {R ‘flush’}
E I st {R ‘straight’}
E I t {R ‘three-of-a-kind’}
E I p1 & p2 {R ‘two-pair’}
E I p1 {R ‘one-pair’}
E {R ‘high-card’}
F analyzeHand(inHand)
V handLen = 5
V face = ‘A23456789TJQK’
V suit = ‘SHCD’
V errorMessage = ‘invalid hand.’
V hand = sorted(inHand.split(‘ ’))
I hand.len != handLen
R errorMessage
I Set(hand).len != handLen
R errorMessage‘ Duplicated cards.’
V faceCount = [0] * face.len
V suitCount = [0] * suit.len
L(card) hand
I card.len != 2
R errorMessage
V? n = face.find(card[0])
V? l = suit.find(card[1])
I n == N | l == N
R errorMessage
faceCount[n]++
suitCount[l]++
R analyzeHandHelper(faceCount, suitCount)
L(hand) [‘2H 2D 2S KS QD’,
‘2H 5H 7D 8S 9D’,
‘AH 2D 3S 4S 5S’,
‘2H 3H 2D 3S 3D’,
‘2H 7H 2D 3S 3D’,
‘2H 7H 7D 7S 7C’,
‘TH JH QH KH AH’,
‘4H 4C KC 5D TC’,
‘QC TC 7C 6C 4C’]
print(hand‘: ’analyzeHand(hand))- Output:
2H 2D 2S KS QD: three-of-a-kind 2H 5H 7D 8S 9D: high-card AH 2D 3S 4S 5S: straight 2H 3H 2D 3S 3D: full-house 2H 7H 2D 3S 3D: two-pair 2H 7H 7D 7S 7C: four-of-a-kind TH JH QH KH AH: straight-flush 4H 4C KC 5D TC: one-pair QC TC 7C 6C 4C: flush
Ada
pragma Ada_2022;
with Ada.Characters.Handling; use Ada.Characters.Handling;
with Ada.Containers.Generic_Constrained_Array_Sort;
with Ada.Text_IO; use Ada.Text_IO;
procedure Poker is
type Face_T is (two, three, four, five, six, seven, eight, nine, t, j, q, k, a);
for Face_T use (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14);
type Suit_T is (C, D, H, S);
type Card_T is record
Face : Face_T;
Suit : Suit_T;
end record;
subtype Hand_Index is Natural range 1 .. 5;
type Hand_T is array (Hand_Index) of Card_T;
type Test_Hand_Arr is array (Positive range <>) of Hand_T;
type Pip_Counter_T is array (Face_T range Face_T'Range) of Natural;
Pip_Counts : Pip_Counter_T := [others => 0];
Test_Hands : Test_Hand_Arr := [
1 => [(two, H), (two, D), (two, C), (k, S), (q, D)],
2 => [(two, H), (five, H), (seven, D), (eight, C), (nine, S)],
3 => [(a, H), (two, D), (three, C), (four, C), (five, D)],
4 => [(two, H), (three, H), (two, D), (three, C), (three, D)],
5 => [(two, H), (seven, H), (two, D), (three, C), (three, D)],
6 => [(two, H), (seven, H), (seven, D), (seven, C), (seven, S)],
7 => [(t, H), (j, H), (q, H), (k, H), (a, H)],
8 => [(four, H), (four, S), (k, S), (five, D), (t, S)],
9 => [(q, C), (t, C), (seven, C), (six, C), (q, C)]
];
function "<" (L, R : Card_T) return Boolean is
begin
if L.Face = R.Face then
return L.Suit < R.Suit;
else
return L.Face < R.Face;
end if;
end "<";
procedure Sort_Hand is new Ada.Containers.Generic_Constrained_Array_Sort (Hand_Index, Card_T, Hand_T);
procedure Print_Hand (Hand : Hand_T) is
begin
for Card of Hand loop
if Card.Face < j then
Put (Face_T'Enum_Rep (Card.Face)'Image);
else
Put (" " & To_Lower (Card.Face'Img));
end if;
Put (To_Lower (Card.Suit'Img));
end loop;
end Print_Hand;
function Is_Invalid (Hand : Hand_T) return Boolean is
begin
for Ix in 2 .. 5 loop
if Face_T'Pos (Hand (Ix).Face) = Face_T'Pos (Hand (Ix - 1).Face) and then
Hand (Ix).Suit = Hand (Ix - 1).Suit
then
return True;
end if;
end loop;
return False;
end Is_Invalid;
function Is_Flush (Hand : Hand_T) return Boolean is
begin
for Ix in 2 .. 5 loop
if Hand (Ix).Suit /= Hand (1).Suit then
return False;
end if;
end loop;
return True;
end Is_Flush;
function Is_Straight (Hand : Hand_T) return Boolean is
begin
-- special case: Ace low
if Hand (5).Face = a and then Hand (1).Face = two and then Hand (2).Face = three and then Hand (3).Face = four then
return True;
end if;
for Ix in 2 .. 5 loop
if Face_T'Pos (Hand (Ix).Face) /= Face_T'Pos (Hand (Ix - 1).Face) + 1 then
return False;
end if;
end loop;
return True;
end Is_Straight;
function Of_A_Kind (N : Positive) return Boolean is
begin
for Pip in two .. a loop
if Pip_Counts (Pip) = N then
return True;
end if;
end loop;
return False;
end Of_A_Kind;
function Count_Pairs return Natural is
Pairs : Natural := 0;
begin
for Pip in two .. a loop
if Pip_Counts (Pip) = 2 then
Pairs := Pairs + 1;
end if;
end loop;
return Pairs;
end Count_Pairs;
Flush, Straight : Boolean;
begin
for Hand of Test_Hands loop
Print_Hand (Hand);
Put (":");
Set_Col (20);
Sort_Hand (Hand); -- Print_Hand (Hand);
if Is_Invalid (Hand) then
Put ("invalid");
else
Flush := Is_Flush (Hand);
Straight := Is_Straight (Hand);
if Flush and Straight then
Put ("straight-flush");
else
for Pip in two .. a loop
Pip_Counts (Pip) := 0;
for Card of Hand loop
if Card.Face = Pip then
Pip_Counts (Pip) := Pip_Counts (Pip) + 1;
end if;
end loop;
end loop;
if Of_A_Kind (4) then
Put ("four-of-a-kind");
elsif Of_A_Kind (3) and then Of_A_Kind (2) then
Put ("full-house");
elsif Flush then
Put ("flush");
elsif Straight then
Put ("straight");
elsif Of_A_Kind (3) then
Put ("three-of-a-kind");
else
case Count_Pairs is
when 2 => Put ("two-pairs");
when 1 => Put ("one-pair");
when others => Put ("high-card");
end case;
end if;
end if;
end if;
Put_Line ("");
end loop;
end Poker;
Output:
2h 2d 2c ks qd: three-of-a-kind 2h 5h 7d 8c 9s: high-card ah 2d 3c 4c 5d: straight 2h 3h 2d 3c 3d: full-house 2h 7h 2d 3c 3d: two-pairs 2h 7h 7d 7c 7s: four-of-a-kind 10h jh qh kh ah: straight-flush 4h 4s ks 5d 10s: one-pair qc 10c 7c 6c qc: invalid
AutoHotkey
PokerHand(hand){
StringUpper, hand, hand
Sort, hand, FCardSort D%A_Space%
cardSeq := RegExReplace(hand, "[^2-9TJQKA]")
Straight:= InStr("23456789TJQKA", cardSeq) || (cardSeq = "2345A") ? true : false
hand := cardSeq = "2345A" ? RegExReplace(hand, "(.*)\h(A.)", "$2 $1") : hand
Royal := InStr(hand, "A") ? "Royal": "Straight"
return (hand ~= "[2-9TJQKA](.)\h.\1\h.\1\h.\1\h.\1") && (Straight) ? hand "`t" Royal " Flush"
: (hand ~= "([2-9TJQKA]).*?\1.*?\1.*?\1") ? hand "`tFour of a Kind"
: (hand ~= "^([2-9TJQKA]).\h\1.\h(?!\1)([2-9TJQKA]).\h\2.\h\2.$") ? hand "`tFull House" ; xxyyy
: (hand ~= "^([2-9TJQKA]).\h\1.\h\1.\h(?!\1)([2-9TJQKA]).\h\2.$") ? hand "`tFull House" ; xxxyy
: (hand ~= "[2-9TJQKA](.)\h.\1\h.\1\h.\1\h.\1") ? hand "`tFlush"
: (Straight) ? hand "`tStraight"
: (hand ~= "([2-9TJQKA]).*?\1.*?\1") ? hand "`tThree of a Kind"
: (hand ~= "([2-9TJQKA]).\h\1.*?([2-9TJQKA]).\h\2") ? hand "`tTwo Pair"
: (hand ~= "([2-9TJQKA]).\h\1") ? hand "`tOne Pair"
: hand "`tHigh Card"
}
CardSort(a, b){
a := SubStr(a, 1, 1), b := SubStr(b, 1, 1)
a := (a = "T") ? 10 : (a = "J") ? 11 : (a = "Q") ? 12 : (a = "K") ? 13 : a
b := (b = "T") ? 10 : (b = "J") ? 11 : (b = "Q") ? 12 : (b = "K") ? 13 : b
return a > b ? 1 : a < b ? -1 : 0
}
Examples:
hands =
(join`r`n
2♥ 2♦ 2♣ k♣ q♦
2♥ 5♥ 7♦ 8♣ 9♠
a♥ 2♦ 3♣ 4♣ 5♦
2♥ 3♥ 2♦ 3♣ 3♦
2♥ 3♥ 2♦ 2♣ 3♦
2♥ 7♥ 2♦ 3♣ 3♦
2♥ 7♥ 7♦ 7♣ 7♠
T♥ j♥ q♥ a♥ K♥
T♥ j♥ q♥ 9♥ K♥
4♥ 4♠ k♠ 5♦ T♠
q♣ T♣ 7♣ 6♣ 4♣
)
loop, parse, hands, `n, `r
res .= PokerHand(A_LoopField) "`n"
MsgBox, 262144, , % res
return
Outputs:
2♦ 2♣ 2♥ Q♦ K♣ Three of a Kind 2♥ 5♥ 7♦ 8♣ 9♠ High Card A♥ 2♦ 3♣ 4♣ 5♦ Straight 2♦ 2♥ 3♣ 3♦ 3♥ Full House 2♣ 2♦ 2♥ 3♦ 3♥ Full House 2♦ 2♥ 3♣ 3♦ 7♥ Two Pair 2♥ 7♦ 7♣ 7♠ 7♥ Four of a Kind T♥ J♥ Q♥ K♥ A♥ Royal Flush 9♥ T♥ J♥ Q♥ K♥ Straight Flush 4♠ 4♥ 5♦ T♠ K♠ One Pair 4♣ 6♣ 7♣ T♣ Q♣ Flush
C
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#define TRUE 1
#define FALSE 0
#define FACES "23456789tjqka"
#define SUITS "shdc"
typedef int bool;
typedef struct {
int face; /* FACES map to 0..12 respectively */
char suit;
} card;
card cards[5];
int compare_card(const void *a, const void *b) {
card c1 = *(card *)a;
card c2 = *(card *)b;
return c1.face - c2.face;
}
bool equals_card(card c1, card c2) {
if (c1.face == c2.face && c1.suit == c2.suit) return TRUE;
return FALSE;
}
bool are_distinct() {
int i, j;
for (i = 0; i < 4; ++i)
for (j = i + 1; j < 5; ++j)
if (equals_card(cards[i], cards[j])) return FALSE;
return TRUE;
}
bool is_straight() {
int i;
qsort(cards, 5, sizeof(card), compare_card);
if (cards[0].face + 4 == cards[4].face) return TRUE;
if (cards[4].face == 12 && cards[0].face == 0 &&
cards[3].face == 3) return TRUE;
return FALSE;
}
bool is_flush() {
int i;
char suit = cards[0].suit;
for (i = 1; i < 5; ++i) if (cards[i].suit != suit) return FALSE;
return TRUE;
}
const char *analyze_hand(const char *hand) {
int i, j, gs = 0;
char suit, *cp;
bool found, flush, straight;
int groups[13];
if (strlen(hand) != 14) return "invalid";
for (i = 0; i < 14; i += 3) {
cp = strchr(FACES, tolower(hand[i]));
if (cp == NULL) return "invalid";
j = i / 3;
cards[j].face = cp - FACES;
suit = tolower(hand[i + 1]);
cp = strchr(SUITS, suit);
if (cp == NULL) return "invalid";
cards[j].suit = suit;
}
if (!are_distinct()) return "invalid";
for (i = 0; i < 13; ++i) groups[i] = 0;
for (i = 0; i < 5; ++i) groups[cards[i].face]++;
for (i = 0; i < 13; ++i) if (groups[i] > 0) gs++;
switch(gs) {
case 2:
found = FALSE;
for (i = 0; i < 13; ++i) if (groups[i] == 4) {
found = TRUE;
break;
}
if (found) return "four-of-a-kind";
return "full-house";
case 3:
found = FALSE;
for (i = 0; i < 13; ++i) if (groups[i] == 3) {
found = TRUE;
break;
}
if (found) return "three-of-a-kind";
return "two-pairs";
case 4:
return "one-pair";
default:
flush = is_flush();
straight = is_straight();
if (flush && straight)
return "straight-flush";
else if (flush)
return "flush";
else if (straight)
return "straight";
else
return "high-card";
}
}
int main(){
int i;
const char *type;
const char *hands[10] = {
"2h 2d 2c kc qd",
"2h 5h 7d 8c 9s",
"ah 2d 3c 4c 5d",
"2h 3h 2d 3c 3d",
"2h 7h 2d 3c 3d",
"2h 7h 7d 7c 7s",
"th jh qh kh ah",
"4h 4s ks 5d ts",
"qc tc 7c 6c 4c",
"ah ah 7c 6c 4c"
};
for (i = 0; i < 10; ++i) {
type = analyze_hand(hands[i]);
printf("%s: %s\n", hands[i], type);
}
return 0;
}
- Output:
2h 2d 2c kc qd: three-of-a-kind 2h 5h 7d 8c 9s: high-card ah 2d 3c 4c 5d: straight 2h 3h 2d 3c 3d: full-house 2h 7h 2d 3c 3d: two-pairs 2h 7h 7d 7c 7s: four-of-a-kind th jh qh kh ah: straight-flush 4h 4s ks 5d ts: one-pair qc tc 7c 6c 4c: flush ah ah 7c 6c 4c: invalid
C#
using System;
using System.Collections.Generic;
using static System.Linq.Enumerable;
public static class PokerHandAnalyzer
{
private enum Hand {
Invalid, High_Card, One_Pair, Two_Pair, Three_Of_A_Kind, Straight,
Flush, Full_House, Four_Of_A_Kind, Straight_Flush, Five_Of_A_Kind
}
private const bool Y = true;
private const char C = '♣', D = '♦', H = '♥', S = '♠';
private const int rankMask = 0b11_1111_1111_1111;
private const int suitMask = 0b1111 << 14;
private static readonly string[] ranks = { "a", "2", "3", "4", "5", "6", "7", "8", "9", "10", "j", "q", "k" };
private static readonly string[] suits = { C + "", D + "", H + "", S + "" };
private static readonly Card[] deck = (from suit in Range(1, 4) from rank in Range(1, 13) select new Card(rank, suit)).ToArray();
public static void Main() {
string[] hands = {
"2♥ 2♦ 2♣ k♣ q♦",
"2♥ 5♥ 7♦ 8♣ 9♠",
"a♥ 2♦ 3♣ 4♣ 5♦",
"2♥ 3♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 7♦ 7♣ 7♠",
"10♥ j♥ q♥ k♥ a♥",
"4♥ 4♠ k♠ 5♦ 10♠",
"q♣ 10♣ 7♣ 6♣ 4♣",
"4♥ 4♣ 4♥ 4♠ 4♦", //duplicate card
"joker 2♦ 2♠ k♠ q♦",
"joker 5♥ 7♦ 8♠ 9♦",
"joker 2♦ 3♠ 4♠ 5♠",
"joker 3♥ 2♦ 3♠ 3♦",
"joker 7♥ 2♦ 3♠ 3♦",
"joker 7♥ 7♦ 7♠ 7♣",
"joker j♥ q♥ k♥ A♥",
"joker 4♣ k♣ 5♦ 10♠",
"joker k♣ 7♣ 6♣ 4♣",
"joker 2♦ joker 4♠ 5♠",
"joker Q♦ joker A♠ 10♠",
"joker Q♦ joker A♦ 10♦",
"joker 2♦ 2♠ joker q♦"
};
foreach (var h in hands) {
Console.WriteLine($"{h}: {Analyze(h).Name()}");
}
}
static string Name(this Hand hand) => string.Join('-', hand.ToString().Split('_')).ToLower();
static List<T> With<T>(this List<T> list, int index, T item) {
list[index] = item;
return list;
}
struct Card : IEquatable<Card>, IComparable<Card>
{
public static readonly Card Invalid = new Card(-1, -1);
public static readonly Card Joker = new Card(0, 0);
public Card(int rank, int suit) {
(Rank, Suit, Code) = (rank, suit) switch {
(_, -1) => (-1, -1, -1),
(-1, _) => (-1, -1, -1),
(0, _) => (0, 0, 0),
(1, _) => (rank, suit, (1 << (13 + suit)) | ((1 << 13) | 1)),
(_, _) => (rank, suit, (1 << (13 + suit)) | (1 << (rank - 1)))
};
}
public static implicit operator Card((int rank, int suit) tuple) => new Card(tuple.rank, tuple.suit);
public int Rank { get; }
public int Suit { get; }
public int Code { get; }
public override string ToString() => Rank switch {
-1 => "invalid",
0 => "joker",
_ => $"{ranks[Rank-1]}{suits[Suit-1]}"
};
public override int GetHashCode() => Rank << 16 | Suit;
public bool Equals(Card other) => Rank == other.Rank && Suit == other.Suit;
public int CompareTo(Card other) {
int c = Rank.CompareTo(other.Rank);
if (c != 0) return c;
return Suit.CompareTo(other.Suit);
}
}
static Hand Analyze(string hand) {
var cards = ParseHand(hand);
if (cards.Count != 5) return Hand.Invalid; //hand must consist of 5 cards
cards.Sort();
if (cards[0].Equals(Card.Invalid)) return Hand.Invalid;
int jokers = cards.LastIndexOf(Card.Joker) + 1;
if (jokers > 2) return Hand.Invalid; //more than 2 jokers
if (cards.Skip(jokers).Distinct().Count() + jokers != 5) return Hand.Invalid; //duplicate cards
if (jokers == 2) return (from c0 in deck from c1 in deck select Evaluate(cards.With(0, c0).With(1, c1))).Max();
if (jokers == 1) return (from c0 in deck select Evaluate(cards.With(0, c0))).Max();
return Evaluate(cards);
}
static List<Card> ParseHand(string hand) =>
hand.Split(default(char[]), StringSplitOptions.RemoveEmptyEntries)
.Select(card => ParseCard(card.ToLower())).ToList();
static Card ParseCard(string card) => (card.Length, card) switch {
(5, "joker") => Card.Joker,
(3, _) when card[..2] == "10" => (10, ParseSuit(card[2])),
(2, _) => (ParseRank(card[0]), ParseSuit(card[1])),
(_, _) => Card.Invalid
};
static int ParseRank(char rank) => rank switch {
'a' => 1,
'j' => 11,
'q' => 12,
'k' => 13,
_ when rank >= '2' && rank <= '9' => rank - '0',
_ => -1
};
static int ParseSuit(char suit) => suit switch {
C => 1, 'c' => 1,
D => 2, 'd' => 2,
H => 3, 'h' => 3,
S => 4, 's' => 4,
_ => -1
};
static Hand Evaluate(List<Card> hand) {
var frequencies = hand.GroupBy(c => c.Rank).Select(g => g.Count()).OrderByDescending(c => c).ToArray();
(int f0, int f1) = (frequencies[0], frequencies.Length > 1 ? frequencies[1] : 0);
return (IsFlush(), IsStraight(), f0, f1) switch {
(_, _, 5, _) => Hand.Five_Of_A_Kind,
(Y, Y, _, _) => Hand.Straight_Flush,
(_, _, 4, _) => Hand.Four_Of_A_Kind,
(_, _, 3, 2) => Hand.Full_House,
(Y, _, _, _) => Hand.Flush,
(_, Y, _, _) => Hand.Straight,
(_, _, 3, _) => Hand.Three_Of_A_Kind,
(_, _, 2, 2) => Hand.Two_Pair,
(_, _, 2, _) => Hand.One_Pair,
_ => Hand.High_Card
};
bool IsFlush() => hand.Aggregate(suitMask, (r, c) => r & c.Code) > 0;
bool IsStraight() {
int r = hand.Aggregate(0, (r, c) => r | c.Code) & rankMask;
for (int i = 0; i < 4; i++) r &= r << 1;
return r > 0;
}
}
}
- Output:
2♥ 2♦ 2♣ k♣ q♦: three-of-a-kind 2♥ 5♥ 7♦ 8♣ 9♠: high-card a♥ 2♦ 3♣ 4♣ 5♦: straight 2♥ 3♥ 2♦ 3♣ 3♦: full-house 2♥ 7♥ 2♦ 3♣ 3♦: two-pair 2♥ 7♥ 7♦ 7♣ 7♠: four-of-a-kind 10♥ j♥ q♥ k♥ a♥: straight-flush 4♥ 4♠ k♠ 5♦ 10♠: one-pair q♣ 10♣ 7♣ 6♣ 4♣: flush 4♥ 4♣ 4♥ 4♠ 4♦: invalid joker 2♦ 2♠ k♠ q♦: three-of-a-kind joker 5♥ 7♦ 8♠ 9♦: straight joker 2♦ 3♠ 4♠ 5♠: straight joker 3♥ 2♦ 3♠ 3♦: four-of-a-kind joker 7♥ 2♦ 3♠ 3♦: three-of-a-kind joker 7♥ 7♦ 7♠ 7♣: five-of-a-kind joker j♥ q♥ k♥ A♥: straight-flush joker 4♣ k♣ 5♦ 10♠: one-pair joker k♣ 7♣ 6♣ 4♣: flush joker 2♦ joker 4♠ 5♠: straight joker Q♦ joker A♠ 10♠: straight joker Q♦ joker A♦ 10♦: straight-flush joker 2♦ 2♠ joker q♦: four-of-a-kind
C++
#include <iostream>
#include <sstream>
#include <algorithm>
#include <vector>
using namespace std;
class poker
{
public:
poker() { face = "A23456789TJQK"; suit = "SHCD"; }
string analyze( string h )
{
memset( faceCnt, 0, 13 ); memset( suitCnt, 0, 4 ); vector<string> hand;
transform( h.begin(), h.end(), h.begin(), toupper ); istringstream i( h );
copy( istream_iterator<string>( i ), istream_iterator<string>(), back_inserter<vector<string> >( hand ) );
if( hand.size() != 5 ) return "invalid hand."; vector<string>::iterator it = hand.begin();
sort( it, hand.end() ); if( hand.end() != adjacent_find( it, hand.end() ) ) return "invalid hand.";
while( it != hand.end() )
{
if( ( *it ).length() != 2 ) return "invalid hand.";
int n = face.find( ( *it ).at( 0 ) ), l = suit.find( ( *it ).at( 1 ) );
if( n < 0 || l < 0 ) return "invalid hand.";
faceCnt[n]++; suitCnt[l]++; it++;
}
cout << h << ": "; return analyzeHand();
}
private:
string analyzeHand()
{
bool p1 = false, p2 = false, t = false, f = false, fl = false, st = false;
for( int x = 0; x < 13; x++ )
switch( faceCnt[x] )
{
case 2: if( p1 ) p2 = true; else p1 = true; break;
case 3: t = true; break;
case 4: f = true;
}
for( int x = 0; x < 4; x++ )if( suitCnt[x] == 5 ){ fl = true; break; }
if( !p1 && !p2 && !t && !f )
{
int s = 0;
for( int x = 0; x < 13; x++ )
{
if( faceCnt[x] ) s++; else s = 0;
if( s == 5 ) break;
}
st = ( s == 5 ) || ( s == 4 && faceCnt[0] && !faceCnt[1] );
}
if( st && fl ) return "straight-flush";
else if( f ) return "four-of-a-kind";
else if( p1 && t ) return "full-house";
else if( fl ) return "flush";
else if( st ) return "straight";
else if( t ) return "three-of-a-kind";
else if( p1 && p2 ) return "two-pair";
else if( p1 ) return "one-pair";
return "high-card";
}
string face, suit;
unsigned char faceCnt[13], suitCnt[4];
};
int main( int argc, char* argv[] )
{
poker p;
cout << p.analyze( "2h 2d 2s ks qd" ) << endl; cout << p.analyze( "2h 5h 7d 8s 9d" ) << endl;
cout << p.analyze( "ah 2d 3s 4s 5s" ) << endl; cout << p.analyze( "2h 3h 2d 3s 3d" ) << endl;
cout << p.analyze( "2h 7h 2d 3s 3d" ) << endl; cout << p.analyze( "2h 7h 7d 7s 7c" ) << endl;
cout << p.analyze( "th jh qh kh ah" ) << endl; cout << p.analyze( "4h 4c kc 5d tc" ) << endl;
cout << p.analyze( "qc tc 7c 6c 4c" ) << endl << endl; return system( "pause" );
}
- Output:
2H 2D 2S KS QD: three-of-a-kind 2H 5H 7D 8S 9D: high-card AH 2D 3S 4S 5S: straight 2H 3H 2D 3S 3D: full-house 2H 7H 2D 3S 3D: two-pair 2H 7H 7D 7S 7C: four-of-a-kind TH JH QH KH AH: straight-flush 4H 4C KC 5D TC: one-pair QC TC 7C 6C 4C: flush
Clojure
(defn rank [card]
(let [[fst _] card]
(if (Character/isDigit fst)
(Integer/valueOf (str fst))
({\T 10, \J 11, \Q 12, \K 13, \A 14} fst))))
(defn suit [card]
(let [[_ snd] card]
(str snd)))
(defn n-of-a-kind [hand n]
(not (empty? (filter #(= true %) (map #(>= % n) (vals (frequencies (map rank hand))))))))
(defn ranks-with-ace [hand]
(let [ranks (sort (map rank hand))]
(if (some #(= 14 %) ranks) (cons 1 ranks) ranks)))
(defn pair? [hand]
(n-of-a-kind hand 2))
(defn three-of-a-kind? [hand]
(n-of-a-kind hand 3))
(defn four-of-a-kind? [hand]
(n-of-a-kind hand 4))
(defn flush? [hand]
(not (empty? (filter #(= true %) (map #(>= % 5) (vals (frequencies (map suit hand))))))))
(defn full-house? [hand]
(true? (and
(some #(= 2 %) (vals (frequencies (map rank hand))))
(some #(= 3 %) (vals (frequencies (map rank hand)))))))
(defn two-pairs? [hand]
(or
(full-house? hand)
(four-of-a-kind? hand)
(= 2 (count (filter #(= true %) (map #(>= % 2) (vals (frequencies (map rank hand)))))))))
(defn straight? [hand]
(let [hand-a (ranks-with-ace hand)
fst (first hand-a)
snd (second hand-a)]
(or
(= (take 5 hand-a) (range fst (+ fst 5)))
(= (drop 1 hand-a) (range snd (+ snd 5))))))
(defn straight-flush? [hand]
(and
(straight? hand)
(flush? hand)))
(defn invalid? [hand]
(not= 5 (count (set hand))))
(defn check-hand [hand]
(cond
(invalid? hand) "invalid"
(straight-flush? hand) "straight-flush"
(four-of-a-kind? hand) "four-of-a-kind"
(full-house? hand) "full-house"
(flush? hand) "flush"
(straight? hand) "straight"
(three-of-a-kind? hand) "three-of-a-kind"
(two-pairs? hand) "two-pair"
(pair? hand) "one-pair"
:else "high-card"))
; Test examples
(def hands [["2H" "2D" "2S" "KS" "QD"]
["2H" "5H" "7D" "8S" "9D"]
["AH" "2D" "3S" "4S" "5S"]
["2H" "3H" "2D" "3S" "3D"]
["2H" "7H" "2D" "3S" "3D"]
["2H" "7H" "7D" "7S" "7C"]
["TH" "JH" "QH" "KH" "AH"]
["4H" "4C" "KC" "5D" "TC"]
["QC" "TC" "7C" "6C" "4C"]])
(run! println (map #(str % " : " (check-hand %)) hands))
- Output:
["2H" "2D" "2S" "KS" "QD"] : three-of-a-kind ["2H" "5H" "7D" "8S" "9D"] : high-card ["AH" "2D" "3S" "4S" "5S"] : straight ["2H" "3H" "2D" "3S" "3D"] : full-house ["2H" "7H" "2D" "3S" "3D"] : two-pair ["2H" "7H" "7D" "7S" "7C"] : four-of-a-kind ["TH" "JH" "QH" "KH" "AH"] : straight-flush ["4H" "4C" "KC" "5D" "TC"] : one-pair ["QC" "TC" "7C" "6C" "4C"] : flush
D
Basic Version
No bonus for this simple version.
import std.stdio, std.string, std.algorithm, std.range;
string analyzeHand(in string inHand) pure /*nothrow @safe*/ {
enum handLen = 5;
static immutable face = "A23456789TJQK", suit = "SHCD";
static immutable errorMessage = "invalid hand.";
/*immutable*/ const hand = inHand.toUpper.split.sort().release;
if (hand.length != handLen)
return errorMessage;
if (hand.uniq.walkLength != handLen)
return errorMessage ~ " Duplicated cards.";
ubyte[face.length] faceCount;
ubyte[suit.length] suitCount;
foreach (immutable card; hand) {
if (card.length != 2)
return errorMessage;
immutable n = face.countUntil(card[0]);
immutable l = suit.countUntil(card[1]);
if (n < 0 || l < 0)
return errorMessage;
faceCount[n]++;
suitCount[l]++;
}
return analyzeHandHelper(faceCount, suitCount);
}
private string analyzeHandHelper(const ref ubyte[13] faceCount,
const ref ubyte[4] suitCount)
pure nothrow @safe @nogc {
bool p1, p2, t, f, fl, st;
foreach (immutable fc; faceCount)
switch (fc) {
case 2: (p1 ? p2 : p1) = true; break;
case 3: t = true; break;
case 4: f = true; break;
default: // Ignore.
}
foreach (immutable sc; suitCount)
if (sc == 5) {
fl = true;
break;
}
if (!p1 && !p2 && !t && !f) {
uint s = 0;
foreach (immutable fc; faceCount) {
if (fc)
s++;
else
s = 0;
if (s == 5)
break;
}
st = (s == 5) || (s == 4 && faceCount[0] && !faceCount[1]);
}
if (st && fl) return "straight-flush";
else if (f) return "four-of-a-kind";
else if (p1 && t) return "full-house";
else if (fl) return "flush";
else if (st) return "straight";
else if (t) return "three-of-a-kind";
else if (p1 && p2) return "two-pair";
else if (p1) return "one-pair";
else return "high-card";
}
void main() {
// S = Spades, H = Hearts, C = Clubs, D = Diamonds.
foreach (immutable hand; ["2H 2D 2S KS QD",
"2H 5H 7D 8S 9D",
"AH 2D 3S 4S 5S",
"2H 3H 2D 3S 3D",
"2H 7H 2D 3S 3D",
"2H 7H 7D 7S 7C",
"TH JH QH KH AH",
"4H 4C KC 5D TC",
"QC TC 7C 6C 4C"])
writeln(hand, ": ", hand.analyzeHand);
}
- Output:
2H 2D 2S KS QD: three-of-a-kind 2H 5H 7D 8S 9D: high-card AH 2D 3S 4S 5S: straight 2H 3H 2D 3S 3D: full-house 2H 7H 2D 3S 3D: two-pair 2H 7H 7D 7S 7C: four-of-a-kind TH JH QH KH AH: straight-flush 4H 4C KC 5D TC: one-pair QC TC 7C 6C 4C: flush
Elixir
defmodule Card do
@faces ~w(2 3 4 5 6 7 8 9 10 j q k a)
@suits ~w(♥ ♦ ♣ ♠) # ~w(h d c s)
@ordinal @faces |> Enum.with_index |> Map.new
defstruct ~w[face suit ordinal]a
def new(str) do
{face, suit} = String.split_at(str, -1)
if face in @faces and suit in @suits do
ordinal = @ordinal[face]
%__MODULE__{face: face, suit: suit, ordinal: ordinal}
else
raise ArgumentError, "invalid card: #{str}"
end
end
def deck do
for face <- @faces, suit <- @suits, do: "#{face}#{suit}"
end
end
defmodule Hand do
@ranks ~w(high-card one-pair two-pair three-of-a-kind straight flush
full-house four-of-a-kind straight-flush five-of-a-kind)a |>
Enum.with_index |> Map.new
@wheel_faces ~w(2 3 4 5 a)
def new(str_of_cards) do
cards = String.downcase(str_of_cards) |>
String.split([" ", ","], trim: true) |>
Enum.map(&Card.new &1)
grouped = Enum.group_by(cards, &(&1.ordinal)) |> Map.values
face_pattern = Enum.map(grouped, &(length &1)) |> Enum.sort
{consecutive, wheel_faces} = consecutive?(cards)
rank = categorize(cards, face_pattern, consecutive)
rank_num = @ranks[rank]
tiebreaker = if wheel_faces do
for ord <- 3..-1, do: {1,ord}
else
Enum.map(grouped, &{length(&1), hd(&1).ordinal}) |>
Enum.sort |> Enum.reverse
end
{rank_num, tiebreaker, str_of_cards, rank}
end
defp one_suit?(cards) do
Enum.map(cards, &(&1.suit)) |> Enum.uniq |> length == 1
end
defp consecutive?(cards) do
sorted = Enum.sort_by(cards, &(&1.ordinal))
if Enum.map(sorted, &(&1.face)) == @wheel_faces do
{true, true}
else
flag = Enum.map(sorted, &(&1.ordinal)) |>
Enum.chunk(2,1) |>
Enum.all?(fn [a,b] -> a+1 == b end)
{flag, false}
end
end
defp categorize(cards, face_pattern, consecutive) do
case {consecutive, one_suit?(cards)} do
{true, true} -> :"straight-flush"
{true, false} -> :straight
{false, true} -> :flush
_ -> case face_pattern do
[1,1,1,1,1] -> :"high-card"
[1,1,1,2] -> :"one-pair"
[1,2,2] -> :"two-pair"
[1,1,3] -> :"three-of-a-kind"
[2,3] -> :"full-house"
[1,4] -> :"four-of-a-kind"
[5] -> :"five-of-a-kind"
end
end
end
end
test_hands = """
2♥ 2♦ 2♣ k♣ q♦
2♥ 5♥ 7♦ 8♣ 9♠
a♥ 2♦ 3♣ 4♣ 5♦
2♥ 3♥ 2♦ 3♣ 3♦
2♥ 7♥ 2♦ 3♣ 3♦
2♥ 6♥ 2♦ 3♣ 3♦
10♥ j♥ q♥ k♥ a♥
4♥ 4♠ k♠ 2♦ 10♠
4♥ 4♠ k♠ 3♦ 10♠
q♣ 10♣ 7♣ 6♣ 4♣
q♣ 10♣ 7♣ 6♣ 3♣
9♥ 10♥ q♥ k♥ j♣
2♥ 3♥ 4♥ 5♥ a♥
2♥ 2♥ 2♦ 3♣ 3♦
"""
hands = String.split(test_hands, "\n", trim: true) |> Enum.map(&Hand.new(&1))
IO.puts "High to low"
Enum.sort(hands) |> Enum.reverse |>
Enum.each(fn hand -> IO.puts "#{elem(hand,2)}: \t#{elem(hand,3)}" end)
# Extra Credit 2. Examples:
IO.puts "\nExtra Credit 2"
extra_hands = """
joker 2♦ 2♠ k♠ q♦
joker 5♥ 7♦ 8♠ 9♦
joker 2♦ 3♠ 4♠ 5♠
joker 3♥ 2♦ 3♠ 3♦
joker 7♥ 2♦ 3♠ 3♦
joker 7♥ 7♦ 7♠ 7♣
joker j♥ q♥ k♥ A♥
joker 4♣ k♣ 5♦ 10♠
joker k♣ 7♣ 6♣ 4♣
joker 2♦ joker 4♠ 5♠
joker Q♦ joker A♠ 10♠
joker Q♦ joker A♦ 10♦
joker 2♦ 2♠ joker q♦
"""
deck = Card.deck
String.split(extra_hands, "\n", trim: true) |>
Enum.each(fn hand ->
[a,b,c,d,e] = String.split(hand) |>
Enum.map(fn c -> if c=="joker", do: deck, else: [c] end)
cards_list = for v<-a, w<-b, x<-c, y<-d, z<-e, do: "#{v} #{w} #{x} #{y} #{z}"
best = Enum.map(cards_list, &Hand.new &1) |> Enum.max
IO.puts "#{hand}:\t#{elem(best,3)}"
end)
- Output:
High to low 10♥ j♥ q♥ k♥ a♥: straight-flush 2♥ 3♥ 4♥ 5♥ a♥: straight-flush 2♥ 3♥ 2♦ 3♣ 3♦: full-house 2♥ 2♥ 2♦ 3♣ 3♦: full-house q♣ 10♣ 7♣ 6♣ 4♣: flush q♣ 10♣ 7♣ 6♣ 3♣: flush 9♥ 10♥ q♥ k♥ j♣: straight a♥ 2♦ 3♣ 4♣ 5♦: straight 2♥ 2♦ 2♣ k♣ q♦: three-of-a-kind 2♥ 7♥ 2♦ 3♣ 3♦: two-pair 2♥ 6♥ 2♦ 3♣ 3♦: two-pair 4♥ 4♠ k♠ 3♦ 10♠: one-pair 4♥ 4♠ k♠ 2♦ 10♠: one-pair 2♥ 5♥ 7♦ 8♣ 9♠: high-card Extra Credit 2 joker 2♦ 2♠ k♠ q♦: three-of-a-kind joker 5♥ 7♦ 8♠ 9♦: straight joker 2♦ 3♠ 4♠ 5♠: straight joker 3♥ 2♦ 3♠ 3♦: four-of-a-kind joker 7♥ 2♦ 3♠ 3♦: three-of-a-kind joker 7♥ 7♦ 7♠ 7♣: five-of-a-kind joker j♥ q♥ k♥ A♥: straight-flush joker 4♣ k♣ 5♦ 10♠: one-pair joker k♣ 7♣ 6♣ 4♣: flush joker 2♦ joker 4♠ 5♠: straight joker Q♦ joker A♠ 10♠: straight joker Q♦ joker A♦ 10♦: straight-flush joker 2♦ 2♠ joker q♦: four-of-a-kind
F#
type Card = int * int
type Cards = Card list
let joker = (69,69)
let rankInvalid = "invalid", 99
let allCards = {0..12} |> Seq.collect (fun x->({0..3} |> Seq.map (fun y->x,y)))
let allSame = function | y::ys -> List.forall ((=) y) ys | _-> false
let straightList (xs:int list) = xs |> List.sort |> List.mapi (fun i n->n - i) |> allSame
let cardList (s:string): Cards =
s.Split() |> Seq.map (fun s->s.ToLower())
|> Seq.map (fun s ->
if s="joker" then joker
else
match (s |> List.ofSeq) with
| '1'::'0'::xs -> (9, xs) | '!'::xs -> (-1, xs) | x::xs-> ("a23456789!jqk".IndexOf(x), xs) | _ as xs-> (-1, xs)
|> function | -1, _ -> (-1, '!') | x, y::[] -> (x, y) | _ -> (-1, '!')
|> function
| x, 'h' | x, '♥' -> (x, 0) | x, 'd' | x, '♦' -> (x, 1) | x, 'c' | x, '♣' -> (x, 2)
| x, 's' | x, '♠' -> (x, 3) | _ -> (-1, -1)
)
|> Seq.filter (fst >> ((<>) -1)) |> List.ofSeq
let rank (cards: Cards) =
if cards.Length<>5 then rankInvalid
else
let cts = cards |> Seq.groupBy fst |> Seq.map (snd >> Seq.length) |> List.ofSeq |> List.sort |> List.rev
if cts.[0]=5 then ("five-of-a-kind", 1)
else
let flush = cards |> List.map snd |> allSame
let straight =
let (ACE, ALT_ACE) = 0, 13
let faces = cards |> List.map fst |> List.sort
(straightList faces) || (if faces.Head<>ACE then false else (straightList (ALT_ACE::(faces.Tail))))
if straight && flush then ("straight-flush", 2)
else
let cts = cards |> Seq.groupBy fst |> Seq.map (snd >> Seq.length) |> List.ofSeq |> List.sort |> List.rev
if cts.[0]=4 then ("four-of-a-kind", 3)
elif cts.[0]=3 && cts.[1]=2 then ("full-house", 4)
elif flush then ("flush", 5)
elif straight then ("straight", 6)
elif cts.[0]=3 then ("three-of-a-kind", 7)
elif cts.[0]=2 && cts.[1]=2 then ("two-pair", 8)
elif cts.[0]=2 then ("one-pair", 9)
else ("high-card", 10)
let pickBest (xs: seq<Cards>) =
let cmp a b = (<) (snd a) (snd b)
let pick currentBest x = if (cmp (snd x) (snd currentBest)) then x else currentBest
xs |> Seq.map (fun x->x, (rank x)) |> Seq.fold pick ([], rankInvalid)
let calcHandRank handStr =
let cards = handStr |> cardList
if cards.Length<>5
then (cards, rankInvalid)
else
cards |> List.partition ((=) joker) |> fun (x,y) -> x.Length, y
|> function
| (0,xs) when (xs |> Seq.distinct |> Seq.length)=5 -> xs, (rank xs)
| (1,xs) -> allCards |> Seq.map (fun x->x::xs) |> pickBest
| (2,xs) -> allCards |> Seq.collect (fun x->allCards |> Seq.map (fun y->y::x::xs)) |> pickBest
| _ -> cards, rankInvalid
let showHandRank handStr =
// handStr |> calcHandRank |> fun (cards, (rankName,_)) -> printfn "%s: %A %s" handStr cards rankName
handStr |> calcHandRank |> (snd >> fst) |> printfn "%s: %s" handStr
[
"2♥ 2♦ 2♣ k♣ q♦"
"2♥ 5♥ 7♦ 8♣ 9♠"
"a♥ 2♦ 3♣ 4♣ 5♦"
"2♥ 3♥ 2♦ 3♣ 3♦"
"2♥ 7♥ 2♦ 3♣ 3♦"
"2♥ 7♥ 7♦ 7♣ 7♠"
"10♥ j♥ q♥ k♥ a♥"
"4♥ 4♠ k♠ 5♦ 10♠"
"q♣ 10♣ 7♣ 6♣ 4♣"
"joker 2♦ 2♠ k♠ q♦"
"joker 5♥ 7♦ 8♠ 9♦"
"joker 2♦ 3♠ 4♠ 5♠"
"joker 3♥ 2♦ 3♠ 3♦"
"joker 7♥ 2♦ 3♠ 3♦"
"joker 7♥ 7♦ 7♠ 7♣"
"joker j♥ q♥ k♥ A♥"
"joker 4♣ k♣ 5♦ 10♠"
"joker k♣ 7♣ 6♣ 4♣"
"joker 2♦ joker 4♠ 5♠"
"joker Q♦ joker A♠ 10♠"
"joker Q♦ joker A♦ 10♦"
"joker 2♦ 2♠ joker q♦"
]
|> List.iter showHandRank
- Output:
2♥ 2♦ 2♣ k♣ q♦: three-of-a-kind 2♥ 5♥ 7♦ 8♣ 9♠: high-card a♥ 2♦ 3♣ 4♣ 5♦: straight 2♥ 3♥ 2♦ 3♣ 3♦: full-house 2♥ 7♥ 2♦ 3♣ 3♦: two-pair 2♥ 7♥ 7♦ 7♣ 7♠: four-of-a-kind 10♥ j♥ q♥ k♥ a♥: straight-flush 4♥ 4♠ k♠ 5♦ 10♠: one-pair q♣ 10♣ 7♣ 6♣ 4♣: flush joker 2♦ 2♠ k♠ q♦: three-of-a-kind joker 5♥ 7♦ 8♠ 9♦: straight joker 2♦ 3♠ 4♠ 5♠: straight joker 3♥ 2♦ 3♠ 3♦: four-of-a-kind joker 7♥ 2♦ 3♠ 3♦: three-of-a-kind joker 7♥ 7♦ 7♠ 7♣: five-of-a-kind joker j♥ q♥ k♥ A♥: straight-flush joker 4♣ k♣ 5♦ 10♠: one-pair joker k♣ 7♣ 6♣ 4♣: flush joker 2♦ joker 4♠ 5♠: straight joker Q♦ joker A♠ 10♠: straight joker Q♦ joker A♦ 10♦: straight-flush joker 2♦ 2♠ joker q♦: four-of-a-kind
Factor
Factor comes with a poker hand evaluator.
USING: formatting kernel poker sequences ;
{
"2H 2D 2C KC QD"
"2H 5H 7D 8C 9S"
"AH 2D 3C 4C 5D"
"2H 3H 2D 3C 3D"
"2H 7H 2D 3C 3D"
"2H 7H 7D 7C 7S"
"TH JH QH KH AH"
"4H 4S KS 5D TS"
"QC TC 7C 6C 4C"
} [ dup string>hand-name "%s: %s\n" printf ] each
- Output:
2H 2D 2C KC QD: Three of a Kind 2H 5H 7D 8C 9S: High Card AH 2D 3C 4C 5D: Straight 2H 3H 2D 3C 3D: Full House 2H 7H 2D 3C 3D: Two Pair 2H 7H 7D 7C 7S: Four of a Kind TH JH QH KH AH: Straight Flush 4H 4S KS 5D TS: One Pair QC TC 7C 6C 4C: Flush
FreeBASIC
Const As String FACES = "23456789tjqka"
Const As String SUITS = "shdc"
Type card
face As Integer ' FACES map to 0..12 respectively
suit As String
End Type
Dim Shared As card cards(4)
Sub insertionSort(arr() As card, Byval n As Integer)
Dim As Integer i, key, j
For i = 1 To n-1
key = arr(i).face
j = i-1
While j >= 0 And arr(j).face > key
arr(j+1) = arr(j)
j = j-1
Wend
arr(j+1).face = key
Next i
End Sub
Function compareCard(Byval a As card, Byval b As card) As Integer
Return a.face - b.face
End Function
Function equalsCard(Byval c1 As card, Byval c2 As card) As Integer
If c1.face = c2.face And c1.suit = c2.suit Then Return True
Return False
End Function
Function areDistinct() As Integer
Dim As Integer i, j
For i = 0 To 3
For j = i + 1 To 4
If equalsCard(cards(i), cards(j)) = True Then Return False
Next j
Next i
Return True
End Function
Function isStraight() As Boolean
insertionSort(cards(), 5)
If cards(0).face + 4 = cards(4).face Then Return True
If cards(4).face = 12 And cards(0).face = 0 And cards(3).face = 3 Then Return True
Return False
End Function
Function isFlush() As Boolean
Dim As String suit = cards(0).suit
For i As Integer = 1 To 4
If cards(i).suit <> suit Then Return False
Next i
Return True
End Function
Function analyzeHand(Byval hand As String) As String
Dim As Integer i, j, cp, gs = 0
Dim As String suit
Dim As Integer found, flush, straight
Dim As Integer groups(12)
If Len(hand) <> 14 Then Return "invalid"
For i = 0 To 13 Step 3
cp = Instr(FACES, Lcase(Mid(hand, i + 1, 1)))
If cp = 0 Then Return "invalid"
j = i \ 3
cards(j).face = cp - 1
suit = Lcase(Mid(hand, i + 2, 1))
cp = Instr(SUITS, suit)
If cp = 0 Then Return "invalid"
cards(j).suit = suit
Next i
If areDistinct() = False Then Return "invalid"
For i = 0 To 12
groups(i) = 0
Next i
For i = 0 To 4
groups(cards(i).face) += 1
Next i
For i = 0 To 12
If groups(i) > 0 Then gs += 1
Next i
Select Case gs
Case 2
found = False
For i = 0 To 12
If groups(i) = 4 Then
found = True
Exit For
End If
Next i
If found = True Then Return "four-of-a-kind"
Return "full-house"
Case 3
found = False
For i = 0 To 12
If groups(i) = 3 Then
found = True
Exit For
End If
Next i
If found = True Then Return "three-of-a-kind"
Return "two-pairs"
Case 4
Return "one-pair"
Case Else
flush = isFlush()
straight = isStraight()
If flush = True And straight = True Then
Return "straight-flush"
Elseif flush = True Then
Return "flush"
Elseif straight = True Then
Return "straight"
Else
Return "high-card"
End If
End Select
End Function
Dim As String tipo
Dim As String hands(9) = { _
"2h 2d 2c kc qd", _
"2h 5h 7d 8c 9s", _
"ah 2d 3c 4c 5d", _
"2h 3h 2d 3c 3d", _
"2h 7h 2d 3c 3d", _
"2h 7h 7d 7c 7s", _
"th jh qh kh ah", _
"4h 4s ks 5d ts", _
"qc tc 7c 6c 4c", _
"ah ah 7c 6c 4c" }
For i As Integer = 0 To 9
tipo = analyzeHand(hands(i))
Print hands(i); ": "; tipo
Next i
Sleep
- Output:
Same as C entry.
Go
Basic Version
package main
import (
"fmt"
"sort"
"strings"
)
type card struct {
face byte
suit byte
}
const faces = "23456789tjqka"
const suits = "shdc"
func isStraight(cards []card) bool {
sorted := make([]card, 5)
copy(sorted, cards)
sort.Slice(sorted, func(i, j int) bool {
return sorted[i].face < sorted[j].face
})
if sorted[0].face+4 == sorted[4].face {
return true
}
if sorted[4].face == 14 && sorted[0].face == 2 && sorted[3].face == 5 {
return true
}
return false
}
func isFlush(cards []card) bool {
suit := cards[0].suit
for i := 1; i < 5; i++ {
if cards[i].suit != suit {
return false
}
}
return true
}
func analyzeHand(hand string) string {
temp := strings.Fields(strings.ToLower(hand))
splitSet := make(map[string]bool)
var split []string
for _, s := range temp {
if !splitSet[s] {
splitSet[s] = true
split = append(split, s)
}
}
if len(split) != 5 {
return "invalid"
}
var cards []card
for _, s := range split {
if len(s) != 2 {
return "invalid"
}
fIndex := strings.IndexByte(faces, s[0])
if fIndex == -1 {
return "invalid"
}
sIndex := strings.IndexByte(suits, s[1])
if sIndex == -1 {
return "invalid"
}
cards = append(cards, card{byte(fIndex + 2), s[1]})
}
groups := make(map[byte][]card)
for _, c := range cards {
groups[c.face] = append(groups[c.face], c)
}
switch len(groups) {
case 2:
for _, group := range groups {
if len(group) == 4 {
return "four-of-a-kind"
}
}
return "full-house"
case 3:
for _, group := range groups {
if len(group) == 3 {
return "three-of-a-kind"
}
}
return "two-pair"
case 4:
return "one-pair"
default:
flush := isFlush(cards)
straight := isStraight(cards)
switch {
case flush && straight:
return "straight-flush"
case flush:
return "flush"
case straight:
return "straight"
default:
return "high-card"
}
}
}
func main() {
hands := [...]string{
"2h 2d 2c kc qd",
"2h 5h 7d 8c 9s",
"ah 2d 3c 4c 5d",
"2h 3h 2d 3c 3d",
"2h 7h 2d 3c 3d",
"2h 7h 7d 7c 7s",
"th jh qh kh ah",
"4h 4s ks 5d ts",
"qc tc 7c 6c 4c",
"ah ah 7c 6c 4c",
}
for _, hand := range hands {
fmt.Printf("%s: %s\n", hand, analyzeHand(hand))
}
}
- Output:
2h 2d 2c kc qd: three-of-a-kind 2h 5h 7d 8c 9s: high-card ah 2d 3c 4c 5d: straight 2h 3h 2d 3c 3d: full-house 2h 7h 2d 3c 3d: two-pair 2h 7h 7d 7c 7s: four-of-a-kind th jh qh kh ah: straight-flush 4h 4s ks 5d ts: one-pair qc tc 7c 6c 4c: flush ah ah 7c 6c 4c: invalid
Extra Credit Version
package main
import (
"fmt"
"sort"
"strings"
)
type card struct {
face byte
suit byte
}
func isStraight(cards []card, jokers int) bool {
sorted := make([]card, 5)
copy(sorted, cards)
sort.Slice(sorted, func(i, j int) bool {
return sorted[i].face < sorted[j].face
})
switch jokers {
case 0:
switch {
case sorted[0].face+4 == sorted[4].face,
sorted[4].face == 14 && sorted[3].face == 5:
return true
default:
return false
}
case 1:
switch {
case sorted[0].face+3 == sorted[3].face,
sorted[0].face+4 == sorted[3].face,
sorted[3].face == 14 && sorted[2].face == 4,
sorted[3].face == 14 && sorted[2].face == 5:
return true
default:
return false
}
default:
switch {
case sorted[0].face+2 == sorted[2].face,
sorted[0].face+3 == sorted[2].face,
sorted[0].face+4 == sorted[2].face,
sorted[2].face == 14 && sorted[1].face == 3,
sorted[2].face == 14 && sorted[1].face == 4,
sorted[2].face == 14 && sorted[1].face == 5:
return true
default:
return false
}
}
}
func isFlush(cards []card) bool {
sorted := make([]card, 5)
copy(sorted, cards)
sort.Slice(sorted, func(i, j int) bool {
return sorted[i].face < sorted[j].face
})
suit := sorted[0].suit
for i := 1; i < 5; i++ {
if sorted[i].suit != suit && sorted[i].suit != 'j' {
return false
}
}
return true
}
func analyzeHand(hand string) string {
temp := strings.Fields(strings.ToLower(hand))
splitSet := make(map[string]bool)
var split []string
for _, s := range temp {
if !splitSet[s] {
splitSet[s] = true
split = append(split, s)
}
}
if len(split) != 5 {
return "invalid"
}
var cards []card
var jokers = 0
for _, s := range split {
if len(s) != 4 {
return "invalid"
}
cp := []rune(s)[0]
var cd card
switch {
case cp == 0x1f0a1:
cd = card{14, 's'}
case cp == 0x1f0b1:
cd = card{14, 'h'}
case cp == 0x1f0c1:
cd = card{14, 'd'}
case cp == 0x1f0d1:
cd = card{14, 'c'}
case cp == 0x1f0cf:
jokers++
cd = card{15, 'j'} // black joker
case cp == 0x1f0df:
jokers++
cd = card{16, 'j'} // white joker
case cp >= 0x1f0a2 && cp <= 0x1f0ab:
cd = card{byte(cp - 0x1f0a0), 's'}
case cp >= 0x1f0ad && cp <= 0x1f0ae:
cd = card{byte(cp - 0x1f0a1), 's'}
case cp >= 0x1f0b2 && cp <= 0x1f0bb:
cd = card{byte(cp - 0x1f0b0), 'h'}
case cp >= 0x1f0bd && cp <= 0x1f0be:
cd = card{byte(cp - 0x1f0b1), 'h'}
case cp >= 0x1f0c2 && cp <= 0x1f0cb:
cd = card{byte(cp - 0x1f0c0), 'd'}
case cp >= 0x1f0cd && cp <= 0x1f0ce:
cd = card{byte(cp - 0x1f0c1), 'd'}
case cp >= 0x1f0d2 && cp <= 0x1f0db:
cd = card{byte(cp - 0x1f0d0), 'c'}
case cp >= 0x1f0dd && cp <= 0x1f0de:
cd = card{byte(cp - 0x1f0d1), 'c'}
default:
cd = card{0, 'j'} // invalid
}
if cd.face == 0 {
return "invalid"
}
cards = append(cards, cd)
}
groups := make(map[byte][]card)
for _, c := range cards {
groups[c.face] = append(groups[c.face], c)
}
switch len(groups) {
case 2:
for _, group := range groups {
if len(group) == 4 {
switch jokers {
case 0:
return "four-of-a-kind"
default:
return "five-of-a-kind"
}
}
}
return "full-house"
case 3:
for _, group := range groups {
if len(group) == 3 {
switch jokers {
case 0:
return "three-of-a-kind"
case 1:
return "four-of-a-kind"
default:
return "five-of-a-kind"
}
}
}
if jokers == 0 {
return "two-pair"
}
return "full-house"
case 4:
switch jokers {
case 0:
return "one-pair"
case 1:
return "three-of-a-kind"
default:
return "four-of-a-kind"
}
default:
flush := isFlush(cards)
straight := isStraight(cards, jokers)
switch {
case flush && straight:
return "straight-flush"
case flush:
return "flush"
case straight:
return "straight"
default:
if jokers == 0 {
return "high-card"
} else {
return "one-pair"
}
}
}
}
func main() {
hands := [...]string{
"🃏 🃂 🂢 🂮 🃍",
"🃏 🂵 🃇 🂨 🃉",
"🃏 🃂 🂣 🂤 🂥",
"🃏 🂳 🃂 🂣 🃃",
"🃏 🂷 🃂 🂣 🃃",
"🃏 🂷 🃇 🂧 🃗",
"🃏 🂻 🂽 🂾 🂱",
"🃏 🃔 🃞 🃅 🂪",
"🃏 🃞 🃗 🃖 🃔",
"🃏 🃂 🃟 🂤 🂥",
"🃏 🃍 🃟 🂡 🂪",
"🃏 🃍 🃟 🃁 🃊",
"🃏 🃂 🂢 🃟 🃍",
"🃏 🃂 🂢 🃍 🃍",
"🃂 🃞 🃍 🃁 🃊",
}
for _, hand := range hands {
fmt.Printf("%s: %s\n", hand, analyzeHand(hand))
}
}
- Output:
🃏 🃂 🂢 🂮 🃍 : three-of-a-kind 🃏 🂵 🃇 🂨 🃉 : straight 🃏 🃂 🂣 🂤 🂥 : straight 🃏 🂳 🃂 🂣 🃃 : four-of-a-kind 🃏 🂷 🃂 🂣 🃃 : three-of-a-kind 🃏 🂷 🃇 🂧 🃗 : five-of-a-kind 🃏 🂻 🂽 🂾 🂱 : straight-flush 🃏 🃔 🃞 🃅 🂪 : one-pair 🃏 🃞 🃗 🃖 🃔 : flush 🃏 🃂 🃟 🂤 🂥 : straight 🃏 🃍 🃟 🂡 🂪 : straight 🃏 🃍 🃟 🃁 🃊 : straight-flush 🃏 🃂 🂢 🃟 🃍 : four-of-a-kind 🃏 🃂 🂢 🃍 🃍 : invalid 🃂 🃞 🃍 🃁 🃊 : high-card
Haskell
Basic Version
{-# LANGUAGE TupleSections #-}
import Data.Function (on)
import Data.List (group, nub, any, sort, sortBy)
import Data.Maybe (mapMaybe)
import Text.Read (readMaybe)
data Suit = Club | Diamond | Spade | Heart deriving (Show, Eq)
data Rank = Ace | Two | Three | Four | Five | Six | Seven
| Eight | Nine | Ten | Jack | Queen | King
deriving (Show, Eq, Enum, Ord, Bounded)
data Card = Card { suit :: Suit, rank :: Rank } deriving (Show, Eq)
type Hand = [Card]
consumed = pure . (, "")
instance Read Suit where
readsPrec d s = case s of "♥" -> consumed Heart
"♦" -> consumed Diamond
"♣" -> consumed Spade
"♠" -> consumed Club
"h" -> consumed Heart
_ -> []
instance Read Rank where
readsPrec d s = case s of "a" -> consumed Ace
"2" -> consumed Two
"3" -> consumed Three
"4" -> consumed Four
"5" -> consumed Five
"6" -> consumed Six
"7" -> consumed Seven
"8" -> consumed Eight
"9" -> consumed Nine
"10" -> consumed Ten
"j" -> consumed Jack
"q" -> consumed Queen
"k" -> consumed King
_ -> []
instance Read Card where
readsPrec d = fmap (, "") . mapMaybe card . lex
where
card (r, s) = Card <$> (readMaybe s :: Maybe Suit)
<*> (readMaybe r :: Maybe Rank)
-- Special hand
acesHigh :: [Rank]
acesHigh = [Ace, Ten, Jack, Queen, King]
isSucc :: (Enum a, Eq a, Bounded a) => [a] -> Bool
isSucc [] = True
isSucc [x] = True
isSucc (x:y:zs) = (x /= maxBound && y == succ x) && isSucc (y:zs)
nameHand :: Hand -> String
nameHand [] = "Invalid Input"
nameHand cards | invalidHand = "Invalid hand"
| straight && flush = "Straight flush"
| ofKind 4 = "Four of a kind"
| ofKind 3 && ofKind 2 = "Full house"
| flush = "Flush"
| straight = "Straight"
| ofKind 3 = "Three of a kind"
| uniqRanks == 3 = "Two pair"
| uniqRanks == 4 = "One pair"
| otherwise = "High card"
where
sortedRank = sort $ rank <$> cards
rankCounts = sortBy (compare `on` snd) $ (,) <$> head <*> length <$> group sortedRank
uniqRanks = length rankCounts
ofKind n = any ((==n) . snd) rankCounts
straight = isSucc sortedRank || sortedRank == acesHigh
flush = length (nub $ suit <$> cards) == 1
invalidHand = length (nub cards) /= 5
testHands :: [(String, Hand)]
testHands = (,) <$> id <*> mapMaybe readMaybe . words <$>
[ "2♥ 2♦ 2♣ k♣ q♦"
, "2♥ 5♥ 7♦ 8♣ 9♠"
, "a♥ 2♦ 3♣ 4♣ 5♦"
, "2♥ 3♥ 2♦ 3♣ 3♦"
, "2♥ 7♥ 2♦ 3♣ 3♦"
, "2♥ 7♥ 7♦ 7♣ 7♠"
, "10♥ j♥ q♥ k♥ a♥"
, "4♥ 4♠ k♠ 5♦ 10♠"
, "q♣ 10♣ 7♣ 6♣ 4♣"
, "q♣ 10♣ 7♣ 6♣ 7♣" -- duplicate cards
, "Bad input" ]
main :: IO ()
main = mapM_ (putStrLn . (fst <> const ": " <> nameHand . snd)) testHands
- Output:
2♥ 2♦ 2♣ k♣ q♦: Three of a kind 2♥ 5♥ 7♦ 8♣ 9♠: High card a♥ 2♦ 3♣ 4♣ 5♦: Straight 2♥ 3♥ 2♦ 3♣ 3♦: Full house 2♥ 7♥ 2♦ 3♣ 3♦: Two pair 2♥ 7♥ 7♦ 7♣ 7♠: Four of a kind 10♥ j♥ q♥ k♥ a♥: Straight flush 4♥ 4♠ k♠ 5♦ 10♠: One pair q♣ 10♣ 7♣ 6♣ 4♣: Flush q♣ 10♣ 7♣ 6♣ 7♣: Invalid hand Bad input: Invalid Input
J
parseHand=: ' ' cut 7&u: NB. hand must be well formed
Suits=: <"> 7 u: '♥♦♣♦' NB. or Suits=: 'hdcs'
Faces=: <;._1 ' 2 3 4 5 6 7 8 9 10 j q k a'
suits=: {:&.>
faces=: }:&.>
flush=: 1 =&#&~. suits
straight=: 1 = (i.#Faces) +/@E.~ Faces /:~@i. faces
kinds=: #/.~ @:faces
five=: 5 e. kinds NB. jokers or other cheat
four=: 4 e. kinds
three=: 3 e. kinds
two=: 2 e. kinds
twoPair=: 2 = 2 +/ .= kinds
highcard=: 5 = 1 +/ .= kinds
IF=: 2 :'(,&(<m) ^: v)"1'
Or=: 2 :'u ^:(5 e. $) @: v'
Deck=: ,Faces,&.>/Suits
Joker=: <'joker'
joke=: [: ,/^:(#@$ - 2:) (({. ,"1 Deck ,"0 1 }.@}.)^:(5>[)~ i.&Joker)"1^:2@,:
punchLine=: {:@-.&a:@,@|:
rateHand=: [:;:inv [: (, [: punchLine -1 :(0 :0-.LF)@joke) parseHand
('invalid' IF 1:) Or
('high-card' IF highcard) Or
('one-pair' IF two) Or
('two-pair' IF twoPair) Or
('three-of-a-kind' IF three) Or
('straight' IF straight) Or
('flush' IF flush) Or
('full-house' IF (two * three)) Or
('four-of-a-kind' IF four) Or
('straight-flush' IF (straight * flush)) Or
('five-of-a-kind' IF five)
)
Hands=: <@deb;._2 {{)n
2♥ 2♦ 2♣ k♣ q♦
2♥ 5♥ 7♦ 8♣ 9♠
a♥ 2♦ 3♣ 4♣ 5♦
2♥ 3♥ 2♦ 3♣ 3♦
2♥ 7♥ 2♦ 3♣ 3♦
2♥ 7♥ 7♦ 7♣ 7♠
10♥ j♥ q♥ k♥ a♥
4♥ 4♠ k♠ 5♦ 10♠
q♣ 10♣ 7♣ 6♣ 4♣
}}
Note that * acts as "logical and" on logical values (if you need to deal with boolean values in the original sense - which were not constrained to logical values - you should use *. instead of * to achieve boolean multiplication, but that's not needed here).
Output for rateHand@> Hands:
2♥ 2♦ 2♣ k♣ q♦ three-of-a-kind 2♥ 5♥ 7♦ 8♣ 9♠ high-card a♥ 2♦ 3♣ 4♣ 5♦ high-card 2♥ 3♥ 2♦ 3♣ 3♦ full-house 2♥ 7♥ 2♦ 3♣ 3♦ two-pair 2♥ 7♥ 7♦ 7♣ 7♠ four-of-a-kind 10♥ j♥ q♥ k♥ a♥ straight-flush 4♥ 4♠ k♠ 5♦ 10♠ one-pair q♣ 10♣ 7♣ 6♣ 4♣ flush
Output for extra-credit examples
joker 2♦ 2♠ k♠ q♦ three-of-a-kind joker 5♥ 7♦ 8♠ 9♦ straight joker 2♦ 3♠ 4♠ 5♠ straight joker 3♥ 2♦ 3♠ 3♦ four-of-a-kind joker 7♥ 2♦ 3♠ 3♦ three-of-a-kind joker 7♥ 7♦ 7♠ 7♣ five-of-a-kind joker j♥ q♥ k♥ a♥ straight-flush joker 4♣ k♣ 5♦ 10♠ one-pair joker k♣ 7♣ 6♣ 4♣ flush joker 2♦ joker 4♠ 5♠ straight joker q♦ joker a♠ 10♠ straight joker q♦ joker a♦ 10♦ straight-flush joker 2♦ 2♠ joker q♦ four-of-a-kind
Java
This code does not qualify for extra credit. Although it supports wildcards, it does not allow for duplicates.
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
public class PokerHandAnalyzer {
final static String faces = "AKQJT98765432";
final static String suits = "HDSC";
final static String[] deck = buildDeck();
public static void main(String[] args) {
System.out.println("Regular hands:\n");
for (String input : new String[]{"2H 2D 2S KS QD",
"2H 5H 7D 8S 9D",
"AH 2D 3S 4S 5S",
"2H 3H 2D 3S 3D",
"2H 7H 2D 3S 3D",
"2H 7H 7D 7S 7C",
"TH JH QH KH AH",
"4H 4C KC 5D TC",
"QC TC 7C 6C 4C",
"QC TC 7C 7C TD"}) {
System.out.println(analyzeHand(input.split(" ")));
}
System.out.println("\nHands with wildcards:\n");
for (String input : new String[]{"2H 2D 2S KS WW",
"2H 5H 7D 8S WW",
"AH 2D 3S 4S WW",
"2H 3H 2D 3S WW",
"2H 7H 2D 3S WW",
"2H 7H 7D WW WW",
"TH JH QH WW WW",
"4H 4C KC WW WW",
"QC TC 7C WW WW",
"QC TC 7H WW WW"}) {
System.out.println(analyzeHandWithWildcards(input.split(" ")));
}
}
private static Score analyzeHand(final String[] hand) {
if (hand.length != 5)
return new Score("invalid hand: wrong number of cards", -1, hand);
if (new HashSet<>(Arrays.asList(hand)).size() != hand.length)
return new Score("invalid hand: duplicates", -1, hand);
int[] faceCount = new int[faces.length()];
long straight = 0, flush = 0;
for (String card : hand) {
int face = faces.indexOf(card.charAt(0));
if (face == -1)
return new Score("invalid hand: non existing face", -1, hand);
straight |= (1 << face);
faceCount[face]++;
if (suits.indexOf(card.charAt(1)) == -1)
return new Score("invalid hand: non-existing suit", -1, hand);
flush |= (1 << card.charAt(1));
}
// shift the bit pattern to the right as far as possible
while (straight % 2 == 0)
straight >>= 1;
// straight is 00011111; A-2-3-4-5 is 1111000000001
boolean hasStraight = straight == 0b11111 || straight == 0b1111000000001;
// unsets right-most 1-bit, which may be the only one set
boolean hasFlush = (flush & (flush - 1)) == 0;
if (hasStraight && hasFlush)
return new Score("straight-flush", 9, hand);
int total = 0;
for (int count : faceCount) {
if (count == 4)
return new Score("four-of-a-kind", 8, hand);
if (count == 3)
total += 3;
else if (count == 2)
total += 2;
}
if (total == 5)
return new Score("full-house", 7, hand);
if (hasFlush)
return new Score("flush", 6, hand);
if (hasStraight)
return new Score("straight", 5, hand);
if (total == 3)
return new Score("three-of-a-kind", 4, hand);
if (total == 4)
return new Score("two-pair", 3, hand);
if (total == 2)
return new Score("one-pair", 2, hand);
return new Score("high-card", 1, hand);
}
private static WildScore analyzeHandWithWildcards(String[] hand) {
if (Collections.frequency(Arrays.asList(hand), "WW") > 2)
throw new IllegalArgumentException("too many wildcards");
return new WildScore(analyzeHandWithWildcardsR(hand, null), hand.clone());
}
private static Score analyzeHandWithWildcardsR(String[] hand,
Score best) {
for (int i = 0; i < hand.length; i++) {
if (hand[i].equals("WW")) {
for (String card : deck) {
if (!Arrays.asList(hand).contains(card)) {
hand[i] = card;
best = analyzeHandWithWildcardsR(hand, best);
}
}
hand[i] = "WW";
break;
}
}
Score result = analyzeHand(hand);
if (best == null || result.weight > best.weight)
best = result;
return best;
}
private static String[] buildDeck() {
String[] dck = new String[suits.length() * faces.length()];
int i = 0;
for (char s : suits.toCharArray()) {
for (char f : faces.toCharArray()) {
dck[i] = "" + f + s;
i++;
}
}
return dck;
}
private static class Score {
final int weight;
final String name;
final String[] hand;
Score(String n, int w, String[] h) {
weight = w;
name = n;
hand = h != null ? h.clone() : h;
}
@Override
public String toString() {
return Arrays.toString(hand) + " " + name;
}
}
private static class WildScore {
final String[] wild;
final Score score;
WildScore(Score s, String[] w) {
score = s;
wild = w;
}
@Override
public String toString() {
return String.format("%s%n%s%n", Arrays.toString(wild),
score.toString());
}
}
}
- Output:
Regular hands: [2H, 2D, 2S, KS, QD] three-of-a-kind [2H, 5H, 7D, 8S, 9D] high-card [AH, 2D, 3S, 4S, 5S] straight [2H, 3H, 2D, 3S, 3D] full-house [2H, 7H, 2D, 3S, 3D] two-pair [2H, 7H, 7D, 7S, 7C] four-of-a-kind [TH, JH, QH, KH, AH] straight-flush [4H, 4C, KC, 5D, TC] one-pair [QC, TC, 7C, 6C, 4C] flush [QC, TC, 7C, 7C, TD] invalid hand: duplicates Hands with wildcards: [2H, 2D, 2S, KS, WW] [2H, 2D, 2S, KS, 2C] four-of-a-kind [2H, 5H, 7D, 8S, WW] [2H, 5H, 7D, 8S, 8H] one-pair [AH, 2D, 3S, 4S, WW] [AH, 2D, 3S, 4S, 5H] straight [2H, 3H, 2D, 3S, WW] [2H, 3H, 2D, 3S, 3D] full-house [2H, 7H, 2D, 3S, WW] [2H, 7H, 2D, 3S, 2S] three-of-a-kind [2H, 7H, 7D, WW, WW] [2H, 7H, 7D, 7S, 7C] four-of-a-kind [TH, JH, QH, WW, WW] [TH, JH, QH, AH, KH] straight-flush [4H, 4C, KC, WW, WW] [4H, 4C, KC, 4D, 4S] four-of-a-kind [QC, TC, 7C, WW, WW] [QC, TC, 7C, AC, KC] flush [QC, TC, 7H, WW, WW] [QC, TC, 7H, QH, QD] three-of-a-kind
JavaScript
const FACES = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'j', 'q', 'k', 'a'];
const SUITS = ['♥', '♦', '♣', '♠'];
function analyzeHand(hand){
let cards = hand.split(' ').filter(x => x !== 'joker');
let jokers = hand.split(' ').length - cards.length;
let faces = cards.map( card => FACES.indexOf(card.slice(0,-1)) );
let suits = cards.map( card => SUITS.indexOf(card.slice(-1)) );
if( cards.some( (card, i, self) => i !== self.indexOf(card) ) || faces.some(face => face === -1) || suits.some(suit => suit === -1) )
return 'invalid';
let flush = suits.every(suit => suit === suits[0]);
let groups = FACES.map( (face,i) => faces.filter(j => i === j).length).sort( (x, y) => y - x );
let shifted = faces.map(x => (x + 1) % 13);
let distance = Math.min( Math.max(...faces) - Math.min(...faces), Math.max(...shifted) - Math.min(...shifted));
let straight = groups[0] === 1 && distance < 5;
groups[0] += jokers;
if (groups[0] === 5) return 'five-of-a-kind'
else if (straight && flush) return 'straight-flush'
else if (groups[0] === 4) return 'four-of-a-kind'
else if (groups[0] === 3 && groups[1] === 2) return 'full-house'
else if (flush) return 'flush'
else if (straight) return 'straight'
else if (groups[0] === 3) return 'three-of-a-kind'
else if (groups[0] === 2 && groups[1] === 2) return 'two-pair'
else if (groups[0] === 2) return 'one-pair'
else return 'high-card';
}
Demonstrating:
let testHands = [
"2♥ 2♦ 2♣ k♣ q♦",
"2♥ 5♥ 7♦ 8♣ 9♠",
"a♥ 2♦ 3♣ 4♣ 5♦",
"2♥ 3♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 7♦ 7♣ 7♠",
"10♥ j♥ q♥ k♥ a♥",
"4♥ 4♠ k♠ 5♦ 10♠",
"q♣ 10♣ 7♣ 6♣ 4♣",
"joker 4♣ k♣ 5♦ 10♠",
"joker 2♦ 2♠ k♠ q♦",
"joker 3♥ 2♦ 3♠ 3♦",
"joker 7♥ 7♦ 7♠ 7♣",
"joker 2♦ joker 4♠ 5♠",
"joker 2♠ joker a♠ 10♠",
"joker q♦ joker a♦ 10♦"
];
for(hand of testHands) console.log(hand + ": " + analyzeHand(hand));
- Output:
2♥ 2♦ 2♣ k♣ q♦: three-of-a-kind 2♥ 5♥ 7♦ 8♣ 9♠: high-card a♥ 2♦ 3♣ 4♣ 5♦: straight 2♥ 3♥ 2♦ 3♣ 3♦: full-house 2♥ 7♥ 2♦ 3♣ 3♦: two-pair 2♥ 7♥ 7♦ 7♣ 7♠: four-of-a-kind 10♥ j♥ q♥ k♥ a♥: straight-flush 4♥ 4♠ k♠ 5♦ 10♠: one-pair q♣ 10♣ 7♣ 6♣ 4♣: flush joker 4♣ k♣ 5♦ 10♠: one-pair joker 2♦ 2♠ k♠ q♦: three-of-a-kind joker 3♥ 2♦ 3♠ 3♦: four-of-a-kind joker 7♥ 7♦ 7♠ 7♣: five-of-a-kind joker 2♦ joker 4♠ 5♠: straight joker 2♠ joker a♠ 10♠: flush joker q♦ joker a♦ 10♦: straight-flush
jq
Adapted from Wren
Works with jq, the C implementation of jq
Works with gojq, the Go implementation of jq
With a few small tweaks, the program shown below also works with jaq, the Rust implementation of jq.
# A card is represented by a JSON object:
def Card($face; $suit): {$face, $suit};
def FACES: "23456789tjqka";
def SUITS: "shdc";
# Input: an array of Card
def isStraight:
sort_by(.face)
| (.[0].face + 4 == .[4].face)
or (.[4].face == 14 and .[0].face == 2 and .[3].face == 5) ;
def isFlush:
.[0].suit as $suit
| all(.[]; .suit == $suit);
# Input: a string such as "2h 2d 2c kc qd"
def analyzeHand:
(FACES | split("")) as $FACES
| (SUITS | split("")) as $SUITS
| ascii_downcase
| split(" ")
| unique
| if length != 5 or
any(length != 2 or
(.[0:1] | IN($FACES[]) | not) or
(.[1: ] | IN($SUITS[]) | not) )
then "invalid"
else [.[] as $s | Card(($FACES|index($s[0:1])) + 2; $s[1:]) ]
| . as $cards
| group_by(.face)
| if length == 2
then if any(length == 4) then "four-of-a-kind"
else "full-house"
end
elif length == 3
then if any(length == 3) then "three-of-a-kind"
else "two-pairs"
end
elif length == 4
then "one-pair"
else ($cards|[isFlush, isStraight]) as [$flush, $straight]
| if $flush and $straight then "straight-flush"
elif $flush then "flush"
elif $straight then "straight"
else "high-card"
end
end
end ;
def hands: [
"2h 2d 2c kc qd",
"2h 5h 7d 8c 9s",
"ah 2d 3c 4c 5d",
"2h 3h 2d 3c 3d",
"2h 7h 2d 3c 3d",
"2h 7h 7d 7c 7s",
"th jh qh kh ah",
"4h 4s ks 5d ts",
"qc tc 7c 6c 4c",
"ah ah 7c 6c 4c"
];
hands[]
| "\(.): \(analyzeHand)"- Output:
2h 2d 2c kc qd: three-of-a-kind 2h 5h 7d 8c 9s: high-card ah 2d 3c 4c 5d: straight 2h 3h 2d 3c 3d: full-house 2h 7h 2d 3c 3d: two-pairs 2h 7h 7d 7c 7s: four-of-a-kind th jh qh kh ah: straight-flush 4h 4s ks 5d ts: one-pair qc tc 7c 6c 4c: flush ah ah 7c 6c 4c: invalid
Julia
sorteddeck = [string(r) * s for s in "♣♦♥♠", r in "23456789TJQKA"]
cardlessthan(card1, card2) = indexin(x, sorteddeck)[1] < indexin(y, sorteddeck)[1]
decksort(d) = sort(d, lt=cardlessthan)
highestrank(d) = string(highestcard(d)[1])
function hasduplicate(d)
s = sort(d)
for i in 1:length(s)-1
if s[i] == s[i+1]
return true
end
end
false
end
invalid(d) = !all(x -> x in sorteddeck, d) || hasduplicate(d)
function countranks(d)
ranks = Dict()
for c in d
r = string(c[1])
if !haskey(ranks, r)
ranks[r] = 1
else
ranks[r] += 1
end
end
ranks
end
function countsuits(d)
suits = Dict()
for c in d
s = string(c[2])
if !haskey(suits, s)
suits[s] = 1
else
suits[s] += 1
end
end
suits
end
const rankmodifiers = Dict("A" => 130, "K" => 120, "Q" => 110, "J" => 100, "T" => 90,
"9" => 80, "8" => 70, "7" => 60, "6" => 50, "5" => 40,
"4" => 30, "3" => 20, "2" => 10)
rank(card) = rankmodifiers[string(card[1])]
const suitmodifiers = Dict("♠" => 4, "♥" => 3, "♦" => 2, "♣" => 1)
suitrank(card) = suitmodifiers[string(card[2])]
function isstraight(ranksdict)
v = collect(values(ranksdict))
if maximum(v) != 1
return false
else
s = sort(map(x->rankmodifiers[x], collect(keys(ranksdict))))
if s == [10, 20, 30, 40, 130] # aces low straight
return true
else
for i in 1:length(s)-1
if abs(s[i] - s[i+1]) > 10
return false
end
end
end
end
true
end
highestsuit(suitsdict) = sort(collect(keys(suitsdict)), lt=(x,y)->suitsdict[x] < suitsdict[y])[end]
isflush(suitsdict) = length(collect(values(suitsdict))) == 1
isstraightflush(ranks, suits) = isstraight(ranks) && isflush(suits)
isfourofakind(ranksdict) = maximum(values(ranksdict)) == 4 ? true : false
isfullhouse(ranksdict) = sort(collect(values(ranksdict))) == [2, 3]
isthreeofakind(ranksdict) = maximum(values(ranksdict)) == 3 && !isfullhouse(ranksdict) ? true : false
istwopair(ranksdict) = sort(collect(values(ranksdict)))[end-1: end] == [2,2]
isonepair(ranksdict) = sort(collect(values(ranksdict)))[end-1: end] == [1,2]
ishighcard(ranks, suits) = maximum(values(ranks)) == 1 && !isflush(suits) && !isstraight(ranks)
function scorehand(d)
suits = countsuits(d)
ranks = countranks(d)
if invalid(d)
return "invalid"
end
if isstraightflush(ranks, suits) return "straight-flush"
elseif isfourofakind(ranks) return "four-of-a-kind"
elseif isfullhouse(ranks) return "full-house"
elseif isflush(suits) return "flush"
elseif isstraight(ranks) return "straight"
elseif isthreeofakind(ranks) return "three-of-a-kind"
elseif istwopair(ranks) return "two-pair"
elseif isonepair(ranks) return "one-pair"
elseif ishighcard(ranks, suits) return "high-card"
end
end
const hands = [["2♥", "2♦", "2♣", "K♣", "Q♦"], ["2♥", "5♥", "7♦", "8♣", "9♠"],
["A♥", "2♦", "3♣", "4♣", "5♦"], ["2♥", "3♥", "2♦", "3♣", "3♦"],
["2♥", "7♥", "2♦", "3♣", "3♦"], ["2♥", "7♥", "7♦", "7♣", "7♠"],
["T♥", "J♥", "Q♥", "K♥", "A♥"], ["4♥", "4♠", "K♠", "5♦", "T♠"],
["Q♣", "T♣", "7♣", "6♣", "4♣"]]
for hand in hands
println("Hand $hand is a ", scorehand(hand), " hand.")
end
- Output:
Hand ["2♥", "2♦", "2♣", "K♣", "Q♦"] is a three-of-a-kind hand. Hand ["2♥", "5♥", "7♦", "8♣", "9♠"] is a high-card hand. Hand ["A♥", "2♦", "3♣", "4♣", "5♦"] is a straight hand. Hand ["2♥", "3♥", "2♦", "3♣", "3♦"] is a full-house hand. Hand ["2♥", "7♥", "2♦", "3♣", "3♦"] is a two-pair hand. Hand ["2♥", "7♥", "7♦", "7♣", "7♠"] is a four-of-a-kind hand. Hand ["T♥", "J♥", "Q♥", "K♥", "A♥"] is a straight-flush hand. Hand ["4♥", "4♠", "K♠", "5♦", "T♠"] is a one-pair hand. Hand ["Q♣", "T♣", "7♣", "6♣", "4♣"] is a flush hand.
Kotlin
Basic Version
// version 1.1.2
class Card(val face: Int, val suit: Char)
const val FACES = "23456789tjqka"
const val SUITS = "shdc"
fun isStraight(cards: List<Card>): Boolean {
val sorted = cards.sortedBy { it.face }
if (sorted[0].face + 4 == sorted[4].face) return true
if (sorted[4].face == 14 && sorted[0].face == 2 && sorted[3].face == 5) return true
return false
}
fun isFlush(cards: List<Card>): Boolean {
val suit = cards[0].suit
if (cards.drop(1).all { it.suit == suit }) return true
return false
}
fun analyzeHand(hand: String): String {
val h = hand.toLowerCase()
val split = h.split(' ').filterNot { it == "" }.distinct()
if (split.size != 5) return "invalid"
val cards = mutableListOf<Card>()
for (s in split) {
if (s.length != 2) return "invalid"
val fIndex = FACES.indexOf(s[0])
if (fIndex == -1) return "invalid"
val sIndex = SUITS.indexOf(s[1])
if (sIndex == -1) return "invalid"
cards.add(Card(fIndex + 2, s[1]))
}
val groups = cards.groupBy { it.face }
when (groups.size) {
2 -> {
if (groups.any { it.value.size == 4 }) return "four-of-a-kind"
return "full-house"
}
3 -> {
if (groups.any { it.value.size == 3 }) return "three-of-a-kind"
return "two-pair"
}
4 -> return "one-pair"
else -> {
val flush = isFlush(cards)
val straight = isStraight(cards)
when {
flush && straight -> return "straight-flush"
flush -> return "flush"
straight -> return "straight"
else -> return "high-card"
}
}
}
}
fun main(args: Array<String>) {
val hands = arrayOf(
"2h 2d 2c kc qd",
"2h 5h 7d 8c 9s",
"ah 2d 3c 4c 5d",
"2h 3h 2d 3c 3d",
"2h 7h 2d 3c 3d",
"2h 7h 7d 7c 7s",
"th jh qh kh ah",
"4h 4s ks 5d ts",
"qc tc 7c 6c 4c",
"ah ah 7c 6c 4c"
)
for (hand in hands) {
println("$hand: ${analyzeHand(hand)}")
}
}
- Output:
2h 2d 2c kc qd: three-of-a-kind 2h 5h 7d 8c 9s: high-card ah 2d 3c 4c 5d: straight 2h 3h 2d 3c 3d: full-house 2h 7h 2d 3c 3d: two-pair 2h 7h 7d 7c 7s: four-of-a-kind th jh qh kh ah: straight-flush 4h 4s ks 5d ts: one-pair qc tc 7c 6c 4c: flush ah ah 7c 6c 4c: invalid
Extra Credit Version
// version 1.1.2
class Card(val face: Int, val suit: Char)
fun isStraight(cards: List<Card>, jokers: Int): Boolean {
val sorted = cards.sortedBy { it.face }
when (jokers) {
0 -> {
if (sorted[0].face + 4 == sorted[4].face) return true
if (sorted[4].face == 14 && sorted[3].face == 5) return true
return false
}
1 -> {
if (sorted[0].face + 3 == sorted[3].face) return true
if (sorted[0].face + 4 == sorted[3].face) return true
if (sorted[3].face == 14 && sorted[2].face == 4) return true
if (sorted[3].face == 14 && sorted[2].face == 5) return true
return false
}
else -> {
if (sorted[0].face + 2 == sorted[2].face) return true
if (sorted[0].face + 3 == sorted[2].face) return true
if (sorted[0].face + 4 == sorted[2].face) return true
if (sorted[2].face == 14 && sorted[1].face == 3) return true
if (sorted[2].face == 14 && sorted[1].face == 4) return true
if (sorted[2].face == 14 && sorted[1].face == 5) return true
return false
}
}
}
fun isFlush(cards: List<Card>): Boolean {
val sorted = cards.sortedBy { it.face }
val suit = sorted[0].suit
if (sorted.drop(1).all { it.suit == suit || it.suit == 'j' }) return true
return false
}
fun analyzeHand(hand: String): String {
val split = hand.split(' ').filterNot { it == "" }.distinct()
if (split.size != 5) return "invalid"
val cards = mutableListOf<Card>()
var jokers = 0
for (s in split) {
if (s.length != 2) return "invalid"
val cp = s.codePointAt(0)
val card = when (cp) {
0x1f0a1 -> Card(14, 's')
0x1f0b1 -> Card(14, 'h')
0x1f0c1 -> Card(14, 'd')
0x1f0d1 -> Card(14, 'c')
0x1f0cf -> { jokers++; Card(15, 'j') } // black joker
0x1f0df -> { jokers++; Card(16, 'j') } // white joker
in 0x1f0a2..0x1f0ab -> Card(cp - 0x1f0a0, 's')
in 0x1f0ad..0x1f0ae -> Card(cp - 0x1f0a1, 's')
in 0x1f0b2..0x1f0bb -> Card(cp - 0x1f0b0, 'h')
in 0x1f0bd..0x1f0be -> Card(cp - 0x1f0b1, 'h')
in 0x1f0c2..0x1f0cb -> Card(cp - 0x1f0c0, 'd')
in 0x1f0cd..0x1f0ce -> Card(cp - 0x1f0c1, 'd')
in 0x1f0d2..0x1f0db -> Card(cp - 0x1f0d0, 'c')
in 0x1f0dd..0x1f0de -> Card(cp - 0x1f0d1, 'c')
else -> Card(0, 'j') // invalid
}
if (card.face == 0) return "invalid"
cards.add(card)
}
val groups = cards.groupBy { it.face }
when (groups.size) {
2 -> {
if (groups.any { it.value.size == 4 }) {
return when (jokers) {
0 -> "four-of-a-kind"
else -> "five-of-a-kind"
}
}
return "full-house"
}
3 -> {
if (groups.any { it.value.size == 3 }) {
return when (jokers) {
0 -> "three-of-a-kind"
1 -> "four-of-a-kind"
else -> "five-of-a-kind"
}
}
return if (jokers == 0) "two-pair" else "full-house"
}
4 -> return when (jokers) {
0 -> "one-pair"
1 -> "three-of-a-kind"
else -> "four-of-a-kind"
}
else -> {
val flush = isFlush(cards)
val straight = isStraight(cards,jokers)
when {
flush && straight -> return "straight-flush"
flush -> return "flush"
straight -> return "straight"
else -> return if (jokers == 0) "high-card" else "one-pair"
}
}
}
}
fun main(args: Array<String>) {
val hands = arrayOf(
"🃏 🃂 🂢 🂮 🃍",
"🃏 🂵 🃇 🂨 🃉",
"🃏 🃂 🂣 🂤 🂥",
"🃏 🂳 🃂 🂣 🃃",
"🃏 🂷 🃂 🂣 🃃",
"🃏 🂷 🃇 🂧 🃗",
"🃏 🂻 🂽 🂾 🂱",
"🃏 🃔 🃞 🃅 🂪",
"🃏 🃞 🃗 🃖 🃔",
"🃏 🃂 🃟 🂤 🂥",
"🃏 🃍 🃟 🂡 🂪",
"🃏 🃍 🃟 🃁 🃊",
"🃏 🃂 🂢 🃟 🃍",
"🃏 🃂 🂢 🃍 🃍",
"🃂 🃞 🃍 🃁 🃊"
)
for (hand in hands) {
println("$hand : ${analyzeHand(hand)}")
}
}
- Output:
🃏 🃂 🂢 🂮 🃍 : three-of-a-kind 🃏 🂵 🃇 🂨 🃉 : straight 🃏 🃂 🂣 🂤 🂥 : straight 🃏 🂳 🃂 🂣 🃃 : four-of-a-kind 🃏 🂷 🃂 🂣 🃃 : three-of-a-kind 🃏 🂷 🃇 🂧 🃗 : five-of-a-kind 🃏 🂻 🂽 🂾 🂱 : straight-flush 🃏 🃔 🃞 🃅 🂪 : one-pair 🃏 🃞 🃗 🃖 🃔 : flush 🃏 🃂 🃟 🂤 🂥 : straight 🃏 🃍 🃟 🂡 🂪 : straight 🃏 🃍 🃟 🃁 🃊 : straight-flush 🃏 🃂 🂢 🃟 🃍 : four-of-a-kind 🃏 🃂 🂢 🃍 🃍 : invalid 🃂 🃞 🃍 🃁 🃊 : high-card
Liberty Basic
NoMainWin
WindowWidth=900
WindowHeight=720
BackgroundColor$ = "191 191 255" ' buttonface default
Global Deck, MaxDecks
StaticText #1.Debug "", 0, 0, 600, 20
StaticText #1.StaticText "Ten Decks of Poker Hands", 50, 50, 3000, 40
Button #1.Deal "Deal", [Start], UL, 700, 180, 80, 40
Button #1.TenThousand "10,000", [TenThousand], UL, 700, 250, 80, 40
Button #1.Stats "History", ShowStats, UL, 700, 320, 80, 40
Button #1.Quit "Quit", Quit, UL, 700, 390, 80, 40
TextEditor #1.TextEditor 50, 100, 600, 500
open "POKER HANDS" for dialog as #1
#1 "TrapClose Quit"
#1 "Font Ariel 12 Bold"
#1.StaticText "!Font Ariel 16 Bold"
#1.TextEditor "!Font Courier_New 14 Bold"
if not(exists("Poker Hands.txt")) then #1.Stats "!Disable"
MaxDecks=10
wait
[TenThousand]
TenThousand = 1
[Start]
if TenThousand then
MaxDecks=10000
#1.TextEditor "!Hide"
#1.Deal "!Hide"
#1.TenThousand "!Hide"
#1.Stats "!Hide"
#1.Quit "!Hide"
#1.StaticText "Ten Thousand Decks of Poker Hands"
end if
Deck += 1
if TenThousand then #1.Debug Str$(Deck)
if Deck>MaxDecks then Deck -= 1: call Quit
#1.TextEditor "!cls"
call ShuffleDeck 0
'call TestDeck
NextCard=1
for y=1 to 10
for x=1 to 5
y$ = A$(NextCard)
B$(x) = ConvertHiCard$(y$)
NextCard += 1
next x
sort B$(), 1, 5
for x=NextCard-5 to NextCard-1
#1.TextEditor A$(x)+" ";
next x
#1.TextEditor " ";
Values$="" 'determine high value of hand
for x=1 to 5
Values$ = Values$ + left$(B$(x),1)
next x
HiValue$ = RealValue$(right$(Values$,1))
z=0: Flush=0: Straight=0: Royal=0: FourKind=0
ThreeKind=0: Pair=0: TwoPair=0: FullHouse=0
if Flush() then Flush=1
x = Straight()
if x then Straight=1: if x=9 then Royal=1
z$ = Kind$()
Value$ = RealValue$(right$(z$,1))
z=val(left$(z$, len(z$)-1))
if z=41 then FourKind=1
if z=32 then FullHouse=1
if z=31 then ThreeKind=1
if z=22 then TwoPair=1
if z=21 then Pair=1
select case
case Straight and Royal and Flush: #1.TextEditor "Royal Flush": Stats(1) += 1
case Straight and Flush: #1.TextEditor "Straight Flush, " + HiValue$ + " high": Stats(2) += 1
case FourKind: #1.TextEditor "Four of a kind, " + Value$ + "s": Stats(3) += 1
case FullHouse: #1.TextEditor "Full House, " + Value$ + "s high": Stats(4) += 1
case Flush: #1.TextEditor "Flush, " + HiValue$ + " high": Stats(5) += 1
case Straight: #1.TextEditor "Straight, " + HiValue$ + " high": Stats(6) += 1
case ThreeKind: #1.TextEditor "Three of a kind, " + Value$ + "s": Stats(7) += 1
case TwoPair: #1.TextEditor "Two Pair, " + Value$ + " high": Stats(8) += 1
case Pair: #1.TextEditor "Pair " + Value$ + "s": Stats(9) += 1
case else: #1.TextEditor HiValue$ + " high"
end select
next y
#1.TextEditor ""
#1.TextEditor "Deck #" + str$(Deck)
if TenThousand then goto [Start] else wait
function RealValue$(Value$)
select case Value$
case "A": RealValue$="T"
case "B": RealValue$="J"
case "C": RealValue$="Q"
case "D": RealValue$="K"
case "E": RealValue$="A"
case else: RealValue$=Value$
end select
end function
sub SaveStats Deck
Stats(0) = 10*Deck
if not(exists("Poker Hands.txt")) then
open "Poker Hands.txt" for output as #2
for x=0 to 9
print #2 Stats(x)
next
close #2
#1.Stats "!Enable"
else
open "Poker Hands.txt" for input as #2
for x=0 to 9
input #2 History(x)
next
close #2
for x=0 to 9
History(x) += Stats(x)
next
open "Poker Hands.txt" for output as #2
for x=0 to 9
print #2 History(x)
next
close #2
end if
end sub
sub ShowStats
if exists("Poker Hands.txt") then
open "Poker Hands.txt" for input as #2
for x=0 to 9
input #2 History(x)
next
close #2
#1.TextEditor "!cls"
for x=1 to 9
Total += History(x)
next x
Nothing = History(0) - Total
for x=0 to 9
#1.TextEditor using("###,### ", History(x));
select case x
case 0: #1.TextEditor "hands "
case 1: #1.TextEditor "royal flush " + using("##.# %", History(x)/History(0)*100)
case 2: #1.TextEditor "straight flush " + using("##.# %", History(x)/History(0)*100)
case 3: #1.TextEditor "four of a kind " + using("##.# %", History(x)/History(0)*100)
case 4: #1.TextEditor "full house " + using("##.# %", History(x)/History(0)*100)
case 5: #1.TextEditor "flush " + using("##.# %", History(x)/History(0)*100)
case 6: #1.TextEditor "straight " + using("##.# %", History(x)/History(0)*100)
case 7: #1.TextEditor "three of a kind " + using("##.# %", History(x)/History(0)*100)
case 8: #1.TextEditor "two pair " + using("##.# %", History(x)/History(0)*100)
case 9: #1.TextEditor "pair " + using("##.# %", History(x)/History(0)*100)
end select
next
#1.TextEditor using("###,### ", Nothing) + "nothing " + using("###.# %", Nothing/History(0)*100)
end if
end sub
function Kind$()
for x=1 to 5
C$(x) = left$(B$(x), 1)
next x
if C$(1) = C$(2) then 'check for Lo4
Lo2=1
if C$(2) = C$(3) then
Lo2=0: Lo3=1
if C$(3) = C$(4) then
Lo3=0: Kind$="41" + left$(C$(4),1): exit function
end if
end if
end if
if C$(5) = C$(4) then 'check for Hi4
Hi2=1
if C$(4) = C$(3) then
Hi2=0: Hi3=1
if C$(3) = C$(2) then
Hi3=0: Kind$="41" + left$(C$(5),1): exit function
end if
end if
end if
if Lo3 then 'check for Full House and 3Kind
if C$(4) = C$(5) then
Kind$="32" + left$(C$(3),1): exit function
else
Kind$="31" + left$(C$(3),1): exit function
end if
end if
if Hi3 then
if C$(1) = C$(2) then
Kind$="32" + left$(C$(5),1): exit function
else
Kind$="31" + left$(C$(5),1): exit function
end if
end if
if C$(2) = C$(3) and C$(3) = C$(4) then 'Mid3
Kind$="31" + left$(C$(4),1): exit function
end if
if Lo2 and Hi2 then 'check for pairs
Kind$="22" + left$(C$(5),1): exit function
end if
if Lo2 and (C$(3)=C$(4)) then
Kind$="22" + left$(C$(4),1): exit function
end if
if Hi2 and (C$(3)=C$(2)) then
Kind$="22" + left$(C$(5),1): exit function
end if
if Lo2 then Kind$="21" + left$(C$(2),1)
if Hi2 then Kind$="21" + left$(C$(5),1)
if C$(2)=C$(3) then Kind$="21" + left$(C$(3),1)
if C$(3)=C$(4) then Kind$="21" + left$(C$(4),1)
end function
function Straight()
Order$="23456789ABCDEF"
for x=1 to 5
Ranks$ = Ranks$ + left$(B$(x), 1)
next x
x = instr(Order$, Ranks$)
if x then Straight=x
end function
function Flush()
Flush=1
for x=1 to 5
Suits$ = Suits$ + right$(B$(x), 1)
next x
for x=2 to 5
if mid$(Suits$, x, 1) <> left$(Suits$, 1) then Flush=0: exit function
next x
end function
sub ShuffleDeck Jokers
Jokers = int(abs(Jokers)): if Jokers>4 then Jokers=4
Size=52 + Jokers
dim CardDeck$(Size+10,1), A$(Size+10) 'Open new card deck
[Start]
for x=1 to Size
CardDeck$(x,0) = "99"
next x
for x=1 to Size
1 y=RandomNumber(1,Size)
if CardDeck$(y,0)="99" then CardDeck$(y,0)=str$(x) else goto 1
next x
for x=1 to Size 'Examine shuffled deck
if CardDeck$(x,0)=str$(x) then z = 1: exit for
next x
if z then z=0: goto [Start]
for x=1 to Size 'Save shuffled deck
A$(x) = CardFace$(val(CardDeck$(x,0)))
next x
A$(0) = str$(Size)
end sub
function CardFace$(n)
select case n
case 1: CardFace$="AD"
case 2: CardFace$="2D"
case 3: CardFace$="3D"
case 4: CardFace$="4D"
case 5: CardFace$="5D"
case 6: CardFace$="6D"
case 7: CardFace$="7D"
case 8: CardFace$="8D"
case 9: CardFace$="9D"
case 10: CardFace$="TD"
case 11: CardFace$="JD"
case 12: CardFace$="QD"
case 13: CardFace$="KD"
case 14: CardFace$="AC"
case 15: CardFace$="2C"
case 16: CardFace$="3C"
case 17: CardFace$="4C"
case 18: CardFace$="5C"
case 19: CardFace$="6C"
case 20: CardFace$="7C"
case 21: CardFace$="8C"
case 22: CardFace$="9C"
case 23: CardFace$="TC"
case 24: CardFace$="JC"
case 25: CardFace$="QC"
case 26: CardFace$="KC"
case 27: CardFace$="AH"
case 28: CardFace$="2H"
case 29: CardFace$="3H"
case 30: CardFace$="4H"
case 31: CardFace$="5H"
case 32: CardFace$="6H"
case 33: CardFace$="7H"
case 34: CardFace$="8H"
case 35: CardFace$="9H"
case 36: CardFace$="TH"
case 37: CardFace$="JH"
case 38: CardFace$="QH"
case 39: CardFace$="KH"
case 40: CardFace$="AS"
case 41: CardFace$="2S"
case 42: CardFace$="3S"
case 43: CardFace$="4S"
case 44: CardFace$="5S"
case 45: CardFace$="6S"
case 46: CardFace$="7S"
case 47: CardFace$="8S"
case 48: CardFace$="9S"
case 49: CardFace$="TS"
case 50: CardFace$="JS"
case 51: CardFace$="QS"
case 52: CardFace$="KS"
case 53: CardFace$="X1"
case 54: CardFace$="X2"
case 55: CardFace$="X3"
case 56: CardFace$="X4"
end select
end function
function RandomNumber(a, b)
smaller = min(a, b)
range = abs(int(a-b))+1
if range < 1 then exit function
r = int(rnd()*range)
RandomNumber = r + smaller
end function
function ConvertHiCard$(Card$)
select case left$(Card$,1)
case "T": left$(Card$,1)="A"
case "J": left$(Card$,1)="B"
case "Q": left$(Card$,1)="C"
case "K": left$(Card$,1)="D"
case "A": left$(Card$,1)="E"
case "X": left$(Card$,1)="F"
end select
ConvertHiCard$ = Card$
end function
sub TestDeck
data KD, KC, KS, AH, AS ' full house
data 6D, 6C, 6S, 6H, 8H ' four of a kind (io)
data 2D, 4S, 4C, TH, TD ' two pair
data 4H, 5H, 6H, 7H, 8H ' straight flush
data 9S, QD, QC, QH, 3D ' three of a kind
data 6H, 7D, 8C, 9C, TS ' straight
data TH, AH, AS, AC, AD ' four of a kind (hI)
data 3S, 5S, 7S, 9S, JS ' flush
data AD, KD, QD, JD, TD ' royal flush
data 2C, 2D, 3H, 4S, 5C ' one pair
dim A$(50)
for x=1 to 50
read A$(x)
next x
end sub
function exists(FileName$)
files "", FileName$, FileDir$()
FileCount$ = FileDir$(0, 0)
exists = val(FileCount$)
end function
sub Quit
if Deck = MaxDecks then call SaveStats Deck
close #1
end
end sub- Output:
JH 8C 8S TH KC Pair 8s 9C JS 3S 5D 3D Pair 3s TD QH 6S TS AD Pair Ts AH 9D KD 3H AC Pair As QS 6D JC QD 2H Pair Qs 4H 2D 5S 4C JD Pair 4s KH 6C 4S 7C 5H K high 3C 7D 8D 4D 7H Pair 7s 9S 2S 7S 9H 6H Pair 9s AS QC 5C TC 2C A high Deck #1
Lua
-- Check whether t is a valid poker hand
function valid (t)
if #t ~= 5 then return false end
for k, v in pairs(t) do
for key, card in pairs(t) do
if v.value == card.value and
v.suit == card.suit and
k ~= key
then
return false
end
end
end
return true
end
-- Return numerical value of a single card
function cardValue (card)
local val = card:sub(1, -2)
local n = tonumber(val)
if n then return n end
if val == "j" then return 11 end
if val == "q" then return 12 end
if val == "k" then return 13 end
if val == "a" then return 1 end
error("Invalid card value: " .. val)
end
-- Detect whether hand t is a straight
function straight (t)
table.sort(t, function (a, b) return a.value < b.value end)
local ace, thisValue, lastValue = false
for i = 2, #t do
thisValue, lastValue = t[i].value, t[i-1].value
if lastValue == 1 then ace = i - 1 end
if thisValue ~= lastValue + 1 then
if ace then
t[ace].value = 14
return straight(t)
else
return false
end
end
end
return true
end
-- Detect whether hand t is a flush
function isFlush (t)
local suit = t[1].suit
for card = 2, #t do
if t[card].suit ~= suit then return false end
end
return true
end
-- Return a table of the count of each card value in hand t
function countValues (t)
local countTab, maxCount = {}, 0
for k, v in pairs(t) do
if countTab[v.value] then
countTab[v.value] = countTab[v.value] + 1
else
countTab[v.value] = 1
end
end
return countTab
end
-- Find the highest value in t
function highestCount (t)
local maxCount = 0
for k, v in pairs(t) do
if v > maxCount then maxCount = v end
end
return maxCount
end
-- Detect full-house and two-pair using the value counts in t
function twoTypes (t)
local threes, twos = 0, 0
for k, v in pairs(t) do
if v == 3 then threes = threes + 1 end
if v == 2 then twos = twos + 1 end
end
return threes, twos
end
-- Return the rank of a poker hand represented as a string
function rank (cards)
local hand = {}
for card in cards:gmatch("%S+") do
table.insert(hand, {value = cardValue(card), suit = card:sub(-1, -1)})
end
if not valid(hand) then return "invalid" end
local st, fl = straight(hand), isFlush(hand)
if st and fl then return "straight-flush" end
local valCount = countValues(hand)
local highCount = highestCount(valCount)
if highCount == 4 then return "four-of-a-kind" end
local n3, n2 = twoTypes(valCount)
if n3 == 1 and n2 == 1 then return "full-house" end
if fl then return "flush" end
if st then return "straight" end
if highCount == 3 then return "three-of-a-kind" end
if n3 == 0 and n2 == 2 then return "two-pair" end
if highCount == 2 then return "one-pair" end
return "high-card"
end
-- Main procedure
local testCases = {
"2h 2d 2c kc qd", -- three-of-a-kind
"2h 5h 7d 8c 9s", -- high-card
"ah 2d 3c 4c 5d", -- straight
"2h 3h 2d 3c 3d", -- full-house
"2h 7h 2d 3c 3d", -- two-pair
"2h 7h 7d 7c 7s", -- four-of-a-kind
"10h jh qh kh ah",-- straight-flush
"4h 4s ks 5d 10s",-- one-pair
"qc 10c 7c 6c 4c" -- flush
}
for _, case in pairs(testCases) do print(case, ": " .. rank(case)) end
- Output:
2h 2d 2c kc qd : three-of-a-kind 2h 5h 7d 8c 9s : high-card ah 2d 3c 4c 5d : straight 2h 3h 2d 3c 3d : full-house 2h 7h 2d 3c 3d : two-pair 2h 7h 7d 7c 7s : four-of-a-kind 10h jh qh kh ah : straight-flush 4h 4s ks 5d 10s : one-pair qc 10c 7c 6c 4c : flush
Nim
import algorithm, sequtils, strutils, tables, unicode
type
Suit* = enum ♠, ♥, ♦, ♣
Face* {.pure.} = enum
Ace = (1, "a")
Two = (2, "2")
Three = (3, "3")
Four = (4, "4")
Five = (5, "5")
Six = (6, "6")
Seven = (7, "7")
Eight = (8, "8")
Nine = (9, "9")
Ten = (10, "10")
Jack = (11, "j")
Queen = (12, "q")
King = (13, "k")
Card* = tuple[face: Face; suit: Suit]
Hand* = array[5, Card]
HandValue {.pure.} = enum
Invalid = "invalid"
StraightFlush = "straight-flush"
FourOfAKind = "four-of-a-kind"
FullHouse = "full-house"
Flush = "flush"
Straight = "straight"
ThreeOfAKind = "three-of-a-kind"
TwoPair = "two-pair"
OnePair = "one-pair"
HighCard = "high-card"
CardError = object of ValueError
proc toCard(cardStr: string): Card =
## Convert a card string to a Card.
var runes = cardStr.toRunes
let suitStr = $(runes.pop()) # Extract the suit.
let faceStr = $runes # Take what’s left as the face.
try:
result.face = parseEnum[Face](faceStr)
except ValueError:
raise newException(CardError, "wrong face: " & faceStr)
try:
result.suit = parseEnum[Suit](suitStr)
except ValueError:
raise newException(CardError, "wrong suit: " & suitStr)
proc value(hand: openArray[Card]): HandValue =
## Return the value of a hand.
doAssert hand.len == 5, "Hand must have five cards."
var
cards: seq[Card] # The cards.
faces: CountTable[Face] # Count faces.
suits: CountTable[Suit] # Count suits.
for card in hand:
if card in cards: return Invalid # Duplicate card.
cards.add card
faces.inc card.face
suits.inc card.suit
faces.sort() # Greatest counts first.
suits.sort() # Greatest counts first.
cards.sort() # Smallest faces first.
# Check faces.
for face, count in faces:
case count
of 4:
return FourOfAKind
of 3:
result = ThreeOfAKind
of 2:
if result == ThreeOfAKind: return FullHouse
if result == OnePair: return TwoPair
result = OnePair
else:
if result != Invalid: return
# Search straight.
result = Straight
let start = if cards[0].face == Ace and cards[4].face == King: 2 else: 1
for n in start..4:
if cards[n].face != succ(cards[n - 1].face):
result = HighCard # No straight.
break
# Check suits.
if suits.len == 1: # A single suit.
result = if result == Straight: StraightFlush else: Flush
proc `$`(card: Card): string =
## Return the representation of a card.
var val = 0x1F0A0 + ord(card.suit) * 0x10 + ord(card.face)
if card.face >= Queen: inc val # Skip Knight.
result = $Rune(val)
when isMainModule:
const HandStrings = ["2♥ 2♦ 2♣ k♣ q♦",
"2♥ 5♥ 7♦ 8♣ 9♠",
"a♥ 2♦ 3♣ 4♣ 5♦",
"2♥ 3♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 7♦ 7♣ 7♠",
"10♥ j♥ q♥ k♥ a♥",
"4♥ 4♠ k♠ 5♦ 10♠",
"q♣ 10♣ 7♣ 6♣ 4♣",
"4♥ 4♣ 4♥ 4♠ 4♦"]
for handString in HandStrings:
let hand = handString.split(' ').map(toCard)
echo hand.map(`$`).join(" "), " → ", hand.value
- Output:
🂲 🃂 🃒 🃞 🃍 → three-of-a-kind 🂲 🂵 🃇 🃘 🂩 → high-card 🂱 🃂 🃓 🃔 🃅 → straight 🂲 🂳 🃂 🃓 🃃 → full-house 🂲 🂷 🃂 🃓 🃃 → two-pair 🂲 🂷 🃇 🃗 🂧 → four-of-a-kind 🂺 🂻 🂽 🂾 🂱 → straight-flush 🂴 🂤 🂮 🃅 🂪 → one-pair 🃝 🃚 🃗 🃖 🃔 → flush 🂴 🃔 🂴 🂤 🃄 → invalid
Perl
I dont like jokers. Instead I decided to give hands proper names. For example, "Kings full of Tens" rather than just "full-house".
use strict;
use warnings;
use utf8;
use feature 'say';
use open qw<:encoding(utf-8) :std>;
package Hand {
sub describe {
my $str = pop;
my $hand = init($str);
return "$str: INVALID" if !$hand;
return analyze($hand);
}
sub init {
(my $str = lc shift) =~ tr/234567891jqka♥♦♣♠//cd;
return if $str !~ m/\A (?: [234567891jqka] [♥♦♣♠] ){5} \z/x;
for (my ($i, $cnt) = (0, 0); $i < 10; $i += 2, $cnt = 0) {
my $try = substr $str, $i, 2;
++$cnt while $str =~ m/$try/g;
return if $cnt > 1;
}
my $suits = $str =~ tr/234567891jqka//dr;
my $ranks = $str =~ tr/♥♦♣♠//dr;
return {
hand => $str,
suits => $suits,
ranks => $ranks,
};
}
sub analyze {
my $hand = shift;
my @ranks = split //, $hand->{ranks};
my %cards;
for (@ranks) {
$_ = 10, next if $_ eq '1';
$_ = 11, next if $_ eq 'j';
$_ = 12, next if $_ eq 'q';
$_ = 13, next if $_ eq 'k';
$_ = 14, next if $_ eq 'a';
} continue {
++$cards{ $_ };
}
my $kicker = 0;
my (@pairs, $set, $quads, $straight, $flush);
while (my ($card, $count) = each %cards) {
if ($count == 1) {
$kicker = $card if $kicker < $card;
}
elsif ($count == 2) {
push @pairs, $card;
}
elsif ($count == 3) {
$set = $card;
}
elsif ($count == 4) {
$quads = $card;
}
else {
die "Five of a kind? Cheater!\n";
}
}
$flush = 1 if $hand->{suits} =~ m/\A (.) \1 {4}/x;
$straight = check_straight(@ranks);
return get_high($kicker, \@pairs, $set, $quads, $straight, $flush,);
}
sub check_straight {
my $sequence = join ' ', sort { $a <=> $b } @_;
return 1 if index('2 3 4 5 6 7 8 9 10 11 12 13 14', $sequence) != -1;
return 'wheel' if index('2 3 4 5 14 6 7 8 9 10 11 12 13', $sequence) == 0;
return undef;
}
sub get_high {
my ($kicker, $pairs, $set, $quads, $straight, $flush) = @_;
$kicker = to_s($kicker, 's');
return 'straight-flush: Royal Flush!'
if $straight && $flush && $kicker eq 'Ace' && $straight ne 'wheel';
return "straight-flush: Steel Wheel!"
if $straight && $flush && $straight eq 'wheel';
return "straight-flush: $kicker high"
if $straight && $flush;
return 'four-of-a-kind: '. to_s($quads, 'p')
if $quads;
return 'full-house: '. to_s($set, 'p') .' full of '. to_s($pairs->[0], 'p')
if $set && @$pairs;
return "flush: $kicker high"
if $flush;
return 'straight: Wheel!'
if $straight && $straight eq 'wheel';
return "straight: $kicker high"
if $straight;
return 'three-of-a-kind: '. to_s($set, 'p')
if $set;
return 'two-pairs: '. to_s($pairs->[0], 'p') .' and '. to_s($pairs->[1], 'p')
if @$pairs == 2;
return 'one-pair: '. to_s($pairs->[0], 'p')
if @$pairs == 1;
return "high-card: $kicker";
}
my %to_str = (
2 => 'Two', 3 => 'Three', 4 => 'Four', 5 => 'Five', 6 => 'Six',
7 => 'Seven', 8 => 'Eight', 9 => 'Nine', 10 => 'Ten', 11 => 'Jack',
12 => 'Queen', 13 => 'King', 14 => 'Ace',
);
my %to_str_diffs = (2 => 'Deuces', 6 => 'Sixes',);
sub to_s {
my ($num, $verb) = @_;
# verb is 'singular' or 'plural' (or 's' or 'p')
if ($verb =~ m/\A p/xi) {
return $to_str_diffs{ $num } if $to_str_diffs{ $num };
return $to_str{ $num } .'s';
}
return $to_str{ $num };
}
}
my @cards = (
'10♥ j♥ q♥ k♥ a♥',
'2♥ 3♥ 4♥ 5♥ a♥',
'2♥ 2♣ 2♦ 3♣ 2♠',
'10♥ K♥ K♦ K♣ 10♦',
'q♣ 10♣ 7♣ 6♣ 3♣',
'5♣ 10♣ 7♣ 6♣ 4♣',
'9♥ 10♥ q♥ k♥ j♣',
'a♥ a♣ 3♣ 4♣ 5♦',
'2♥ 2♦ 2♣ k♣ q♦',
'6♥ 7♥ 6♦ j♣ j♦',
'2♥ 6♥ 2♦ 3♣ 3♦',
'7♥ 7♠ k♠ 3♦ 10♠',
'4♥ 4♠ k♠ 2♦ 10♠',
'2♥ 5♥ j♦ 8♣ 9♠',
'2♥ 5♥ 7♦ 8♣ 9♠',
'a♥ a♥ 3♣ 4♣ 5♦', # INVALID: duplicate aces
);
say Hand::describe($_) for @cards;
- Output:
straight-flush: Royal Flush! straight-flush: Steel Wheel! four-of-a-kind: Deuces full-house: Kings full of Tens flush: Queen high flush: Ten high straight: King high one-pair: Aces three-of-a-kind: Deuces two-pairs: Sixes and Jacks two-pairs: Threes and Deuces one-pair: Sevens one-pair: Fours high-card: Jack high-card: Nine a♥ a♥ 3♣ 4♣ 5♦: INVALID
Phix
Woke up this morning with a neat idea for detecting straights, though jokers messed it up a bit.
Uses an ad-hoc ranking system/tie breaker, not recommended for use in tournaments! Displays hands best-first.
Note: I have left a copy of this in demo\HelloUTF8.exw to prove it works, but non-ascii on a Windows
console is not Phix's forte.
For an(other) example of using the unicode card characters see Playing_cards#Phix
You can run this online here.
with javascript_semantics function poker(string hand) hand = substitute(hand,"10","t") sequence cards = split(hand) if length(cards)!=5 then return "invalid hand" end if sequence ranks = repeat(0,13), suits = repeat(0,4) integer jokers = 0 for i=1 to length(cards) do sequence ci = utf8_to_utf32(cards[i]) if ci="joker" then jokers += 1 if jokers>2 then return "invalid hand" end if else if length(ci)!=2 then return "invalid hand" end if integer rank = find(lower(ci[1]),"23456789tjqka") integer suit = find(ci[2],utf8_to_utf32("♥♣♦♠")) if rank=0 or suit=0 then return "invalid hand" end if ranks[rank] += 1 suits[suit] += 1 end if end for integer straight = match({1,1,1,1,1},ranks) if not straight then straight = sort(deep_copy(ranks))[$]=1 and match({0,0,0,0,0,0,0,0},ranks) end if integer _flush = (max(suits)+jokers = 5) integer _pairs = max(ranks)+jokers integer pair = find(2,ranks) integer full_house = _pairs=3 and pair and (jokers=0 or find(2,ranks,pair+1)) integer two_pair = find(2,ranks,pair+1) integer high_card = rfind(1,sq_ne(ranks,0))+1 if jokers and _pairs=jokers+1 then straight = 1 integer k = find(1,ranks), j = jokers for l=k to min(k+5-j,13) do if ranks[l]=0 then if j=0 then straight = 0 exit end if j -= 1 end if end for if straight and j then high_card = min(high_card+j,14) end if elsif straight and ranks[1]!=0 then high_card = find(0,ranks) end if if _pairs=5 then return {10,"five of a kind", find(5-jokers,ranks)+1} end if if straight and _flush then return {9,"straight flush", high_card} end if if _pairs=4 then return {8,"four of a kind", find(4-jokers,ranks)+1} end if if full_house then return {7,"full house", find(3-jokers,ranks)+1} end if if _flush then return {6,"flush", high_card} end if if straight then return {5,"straight", high_card} end if if _pairs=3 then return {4,"three of a kind", find(3-jokers,ranks)+1} end if if pair and two_pair then return {3,"two pair", two_pair+1} end if if pair then return {2,"one pair", pair+1} end if if jokers then return {2,"one pair", high_card} end if return {1,"high card",high_card} end function sequence hands = {{0,"2♥ 2♦ 2♣ k♣ q♦"}, {0,"2♥ 5♥ 7♦ 8♣ 9♠"}, {0,"a♥ 2♦ 3♣ 4♣ 5♦"}, {0,"2♥ 3♥ 2♦ 3♣ 3♦"}, {0,"2♥ 7♥ 2♦ 3♣ 3♦"}, {0,"2♥ 7♥ 7♦ 7♣ 7♠"}, {0,"10♥ j♥ q♥ k♥ a♥"}, {0,"4♥ 4♠ k♠ 5♦ 10♠"}, {0,"q♣ 10♣ 7♣ 6♣ 4♣"}, {0,"joker 2♦ 2♠ k♠ q♦"}, {0,"joker 5♥ 7♦ 8♠ 9♦"}, {0,"joker 2♦ 3♠ 4♠ 5♠"}, {0,"joker 3♥ 2♦ 3♠ 3♦"}, {0,"joker 7♥ 2♦ 3♠ 3♦"}, {0,"joker 7♥ 7♦ 7♠ 7♣"}, {0,"joker j♥ q♥ k♥ A♥"}, {0,"joker 4♣ k♣ 5♦ 10♠"}, {0,"joker k♣ 7♣ 6♣ 4♣"}, {0,"joker 2♦ joker 4♠ 5♠"}, {0,"joker Q♦ joker A♠ 10♠"}, {0,"joker Q♦ joker A♦ 10♦"}, {0,"joker 2♦ 2♠ joker q♦"}} for i=1 to length(hands) do hands[i][1] = poker(hands[i][2]) end for hands = reverse(sort(deep_copy(hands))) integer rank string hand,desc for i=1 to length(hands) do {{rank,desc},hand} = hands[i] printf(1,"%d. %s %s\n",{11-rank,hand,desc}) end for
- Output:
1. joker 7♥ 7♦ 7♠ 7♣ five of a kind 2. joker j♥ q♥ k♥ A♥ straight flush 2. joker Q♦ joker A♦ 10♦ straight flush 2. 10♥ j♥ q♥ k♥ a♥ straight flush 3. 2♥ 7♥ 7♦ 7♣ 7♠ four of a kind 3. joker 3♥ 2♦ 3♠ 3♦ four of a kind 3. joker 2♦ 2♠ joker q♦ four of a kind 4. 2♥ 3♥ 2♦ 3♣ 3♦ full house 5. joker k♣ 7♣ 6♣ 4♣ flush 5. q♣ 10♣ 7♣ 6♣ 4♣ flush 6. joker Q♦ joker A♠ 10♠ straight 6. joker 5♥ 7♦ 8♠ 9♦ straight 6. joker 2♦ joker 4♠ 5♠ straight 6. joker 2♦ 3♠ 4♠ 5♠ straight 6. a♥ 2♦ 3♣ 4♣ 5♦ straight 7. joker 7♥ 2♦ 3♠ 3♦ three of a kind 7. joker 2♦ 2♠ k♠ q♦ three of a kind 7. 2♥ 2♦ 2♣ k♣ q♦ three of a kind 8. 2♥ 7♥ 2♦ 3♣ 3♦ two pair 9. joker 4♣ k♣ 5♦ 10♠ one pair 9. 4♥ 4♠ k♠ 5♦ 10♠ one pair 10. 2♥ 5♥ 7♦ 8♣ 9♠ high card
Picat
go =>
Hands = [
[[2,h], [7,h], [2,d], [3,c], [3,d]], % two-pair
[[2,h], [5,h], [7,d], [8,c], [9,s]], % high-card
[[a,h], [2,d], [3,c], [4,c], [5,d]], % straight
[[2,h], [3,h], [2,d], [3,c], [3,d]], % full-house
[[2,h], [7,h], [2,d], [3,c], [3,d]], % two-pair
[[2,h], [7,h], [7,d], [7,c], [7,s]], % four-of-a-kind
[[10,h],[j,h], [q,h], [k,h], [a,h]], % straight-flush
[[4,h], [4,s], [k,s], [5,d], [10,s]], % one-pair
[[q,c], [10,c],[7,c], [6,c], [4,c]], % flush
[[q,c], [q,d], [q,s], [6,c], [4,c]], % three-of-a-kind
[[q,c], [10,c], [7,c], [7,c], [4,c]], % invalid (duplicates)
[[q,c], [10,c], [7,c], [7,d]] % invalid (too short)
],
foreach(Hand in Hands)
print_hand(Hand),
analyse(Hand, H),
println(hand=H),
nl
end,
nl.
% Print the hand
print_hand(Hand) =>
println([ F.to_string() ++ S.to_string() : [F,S] in Hand]).
% Faces and suites
faces(Faces) => Faces = [a, 2, 3, 4, 5, 6, 7, 8, 9, 10, j, q, k].
faces_order1(Order1) =>
Order1 = new_map([a=1, 2=2, 3=3, 4=4, 5=5, 6=6, 7=7, 8=8, 9=9, 10=10, j=11, q=12, k=13]).
faces_order2(Order2) =>
Order2 = new_map([2=2, 3=3, 4=4, 5=5, 6=6, 7=7, 8=8, 9=9, 10=10, j=11, q=12, k=13, a=14]).
suites(Suites) => Suites = [h,d,c,s].
% Order of the hand
hand_order(HandOrder) =>
HandOrder = [straight_flush,
four_of_a_kind,
full_house,
flush,
straight,
three_of_a_kind,
two_pair,
one_pair,
high_card,
invalid].
% for the straight
in_order(List) =>
foreach(I in 2..List.length)
List[I] = List[I-1] + 1
end.
% Some validity tests first
analyse(Hand,Value) ?=>
(
Hand.remove_dups.length == 5,
faces(Faces),
foreach([F,_] in Hand)
member(F,Faces)
end,
suites(Suites),
foreach([_,S] in Hand)
member(S,Suites)
end,
analyse1(Hand,Value)
;
Value = invalid
).
% Identify the specific hands
% straight flush
analyse1(Hand,Value) ?=>
permutation(Hand,Hand1),
Hand1 = [ [_F1,S], [_F2,S], [_F3,S], [_F4,S], [_F5,S] ],
(
faces_order1(Order1),
in_order([Order1.get(F) : [F,S1] in Hand1])
;
faces_order2(Order2),
in_order([Order2.get(F) : [F,S1] in Hand1]),
println("Royal Straight Flush!")
),
Value=straight_flush.
% four of a kind
analyse1(Hand,Value) ?=>
faces(Faces),
member(A,Faces),
[1 : [F,_S] in Hand, F = A].length == 4,
Value=four_of_a_kind.
% full house
analyse1(Hand,Value) ?=>
permutation(Hand,Hand1),
Hand1 = [ [F1,_S1], [F1,_S2], [F2,_S3], [F2,_S4], [F2,_S5] ],
Value = full_house.
% flush
analyse1(Hand,Value) ?=>
permutation(Hand,Hand1),
Hand1 = [ [_,S], [_,S], [_,S], [_,S], [_,S] ],
Value = flush.
% straight
analyse1(Hand,Value) ?=>
permutation(Hand,Hand1),
(
faces_order1(Order1),
in_order([Order1.get(F) : [F,_S] in Hand1])
;
faces_order2(Order2),
in_order([Order2.get(F) : [F,_S] in Hand1])
),
Value = straight.
% three of a kind
analyse1(Hand,Value) ?=>
faces(Faces),
member(A,Faces),
[1 : [F,_S] in Hand, F = A].length == 3,
Value = three_of_a_kind.
% two pair
analyse1(Hand,Value) ?=>
permutation(Hand,Hand1),
Hand1 = [ [F1,_S1], [F1,_S2], [F2,_S3], [F2,_S4], [_F3,_S5] ],
Value = two_pair.
% one pair
analyse1(Hand,Value) ?=>
faces(Faces),
member(A,Faces),
[1 : [F,_S] in Hand, F = A].length == 2,
Value = one_pair.
% high card
analyse1(_Hand,Value) =>
Value = high_card.
- Output:
[2h,7h,2d,3c,3d] hand = two_pair [2h,5h,7d,8c,9s] hand = high_card [ah,2d,3c,4c,5d] hand = straight [2h,3h,2d,3c,3d] hand = full_house [2h,7h,2d,3c,3d] hand = two_pair [2h,7h,7d,7c,7s] hand = four_of_a_kind [10h,jh,qh,kh,ah] Royal Straight Flush! hand = straight_flush [4h,4s,ks,5d,10s] hand = one_pair [qc,10c,7c,6c,4c] hand = flush [qc,qd,qs,6c,4c] hand = three_of_a_kind [qc,10c,7c,7c,4c] hand = invalid [qc,10c,7c,7d] hand = invalid
For generating and checking random hands:
go2 =>
_ = random2(),
Hand = random_hand(5),
print_hand(Hand),
analyse(Hand, H),
println(hand=H),
nl.
% Get one element of list L
oneof(L) = L[random(1,L.len)].
% Get a random hand
random_hand(N) = Hand =>
faces(Faces),
suites(Suites),
M = new_map(),
while (M.keys().length < N)
M.put([oneof(Faces),oneof(Suites)],1)
end,
Hand = [C : C=_ in M].sort().- Output:
[3d,5h,10c,10h,qs] hand = one_pair
PicoLisp
(rassoc) function in picolisp after 3.1.9.10.
(setq *Rank
'(("2" . 0) ("3" . 1) ("4" . 2)
("5" . 3) ("6" . 4) ("7" . 5)
("8" . 6) ("9" . 7) ("t" . 8)
("j" . 9) ("q" . 10) ("k" . 11)
("a" . 12) ) )
(de poker (Str)
(let (S NIL R NIL Seq NIL)
(for (L (chop Str) (cdr L) (cdddr L))
(accu 'R (cdr (assoc (car L) *Rank)) 1)
(accu 'S (cadr L) 1) )
(setq Seq
(make
(for (L (by car sort R) (cdr L) (cdr L))
(link (- (caar L) (caadr L))) ) ) )
(cond
((and
(= 5 (cdar S))
(or
(= (-1 -1 -1 -1) Seq)
(= (-1 -1 -1 -9) Seq) ) )
'straight-flush )
((rassoc 4 R) 'four-of-a-kind)
((and (rassoc 2 R) (rassoc 3 R)) 'full-house)
((= 5 (cdar S)) 'flush)
((or
(= (-1 -1 -1 -1) Seq)
(= (-1 -1 -1 -9) Seq) )
'straight )
((rassoc 3 R) 'three-of-a-kind)
((=
2
(cnt '((L) (= 2 (cdr L))) R) )
'two-pair )
((rassoc 2 R) 'pair)
(T 'high-card) ) ) )Prolog
Not very efficient version.
:- initialization(main).
faces([a,k,q,j,10,9,8,7,6,5,4,3,2]).
face(F) :- faces(Fs), member(F,Fs).
suit(S) :- member(S, ['♥','♦','♣','♠']).
best_hand(Cards,H) :-
straight_flush(Cards,C) -> H = straight-flush(C)
; many_kind(Cards,F,4) -> H = four-of-a-kind(F)
; full_house(Cards,F1,F2) -> H = full-house(F1,F2)
; flush(Cards,S) -> H = flush(S)
; straight(Cards,F) -> H = straight(F)
; many_kind(Cards,F,3) -> H = three-of-a-kind(F)
; two_pair(Cards,F1,F2) -> H = two-pair(F1,F2)
; many_kind(Cards,F,2) -> H = one-pair(F)
; many_kind(Cards,F,1) -> H = high-card(F)
; H = invalid
.
straight_flush(Cards, c(F,S)) :- straight(Cards,F), flush(Cards,S).
full_house(Cards,F1,F2) :-
many_kind(Cards,F1,3), many_kind(Cards,F2,2), F1 \= F2.
flush(Cards,S) :- maplist(has_suit(S), Cards).
has_suit(S, c(_,S)).
straight(Cards,F) :-
select(c(F,_), Cards, Cs), pred_face(F,F1), straight(Cs,F1).
straight([],_).
pred_face(F,F1) :- F = 2 -> F1 = a ; faces(Fs), append(_, [F,F1|_], Fs).
two_pair(Cards,F1,F2) :-
many_kind(Cards,F1,2), many_kind(Cards,F2,2), F1 \= F2.
many_kind(Cards,F,N) :-
face(F), findall(_, member(c(F,_), Cards), Xs), length(Xs,N).
% utils/parser
parse_line(Cards) --> " ", parse_line(Cards).
parse_line([C|Cs]) --> parse_card(C), parse_line(Cs).
parse_line([]) --> [].
parse_card(c(F,S)) --> parse_face(F), parse_suit(S).
parse_suit(S,In,Out) :- suit(S), atom_codes(S,Xs), append(Xs,Out,In).
parse_face(F,In,Out) :- face(F), face_codes(F,Xs), append(Xs,Out,In).
face_codes(F,Xs) :- number(F) -> number_codes(F,Xs) ; atom_codes(F,Xs).
% tests
test(" 2♥ 2♦ 2♣ k♣ q♦").
test(" 2♥ 5♥ 7♦ 8♣ 9♠").
test(" a♥ 2♦ 3♣ 4♣ 5♦").
test(" 2♥ 3♥ 2♦ 3♣ 3♦").
test(" 2♥ 7♥ 2♦ 3♣ 3♦").
test(" 2♥ 7♥ 7♦ 7♣ 7♠").
test("10♥ j♥ q♥ k♥ a♥").
test(" 4♥ 4♠ k♠ 5♦ 10♠").
test(" q♣ 10♣ 7♣ 6♣ 4♣").
run_tests :-
test(Line), phrase(parse_line(Cards), Line), best_hand(Cards,H)
, write(Cards), write('\t'), write(H), nl
.
main :- findall(_, run_tests, _), halt.
- Output:
[c(2,♥),c(2,♦),c(2,♣),c(k,♣),c(q,♦)] three-of-a-kind(2) [c(2,♥),c(5,♥),c(7,♦),c(8,♣),c(9,♠)] high-card(9) [c(a,♥),c(2,♦),c(3,♣),c(4,♣),c(5,♦)] straight(5) [c(2,♥),c(3,♥),c(2,♦),c(3,♣),c(3,♦)] full-house(3,2) [c(2,♥),c(7,♥),c(2,♦),c(3,♣),c(3,♦)] two-pair(3,2) [c(2,♥),c(7,♥),c(7,♦),c(7,♣),c(7,♠)] four-of-a-kind(7) [c(10,♥),c(j,♥),c(q,♥),c(k,♥),c(a,♥)] straight-flush(c(a,♥)) [c(4,♥),c(4,♠),c(k,♠),c(5,♦),c(10,♠)] one-pair(4) [c(q,♣),c(10,♣),c(7,♣),c(6,♣),c(4,♣)] flush(♣)
Python
Goes a little further in also giving the ordered tie-breaker information from the wikipedia page.
from collections import namedtuple
class Card(namedtuple('Card', 'face, suit')):
def __repr__(self):
return ''.join(self)
suit = '♥ ♦ ♣ ♠'.split()
# ordered strings of faces
faces = '2 3 4 5 6 7 8 9 10 j q k a'
lowaces = 'a 2 3 4 5 6 7 8 9 10 j q k'
# faces as lists
face = faces.split()
lowace = lowaces.split()
def straightflush(hand):
f,fs = ( (lowace, lowaces) if any(card.face == '2' for card in hand)
else (face, faces) )
ordered = sorted(hand, key=lambda card: (f.index(card.face), card.suit))
first, rest = ordered[0], ordered[1:]
if ( all(card.suit == first.suit for card in rest) and
' '.join(card.face for card in ordered) in fs ):
return 'straight-flush', ordered[-1].face
return False
def fourofakind(hand):
allfaces = [f for f,s in hand]
allftypes = set(allfaces)
if len(allftypes) != 2:
return False
for f in allftypes:
if allfaces.count(f) == 4:
allftypes.remove(f)
return 'four-of-a-kind', [f, allftypes.pop()]
else:
return False
def fullhouse(hand):
allfaces = [f for f,s in hand]
allftypes = set(allfaces)
if len(allftypes) != 2:
return False
for f in allftypes:
if allfaces.count(f) == 3:
allftypes.remove(f)
return 'full-house', [f, allftypes.pop()]
else:
return False
def flush(hand):
allstypes = {s for f, s in hand}
if len(allstypes) == 1:
allfaces = [f for f,s in hand]
return 'flush', sorted(allfaces,
key=lambda f: face.index(f),
reverse=True)
return False
def straight(hand):
f,fs = ( (lowace, lowaces) if any(card.face == '2' for card in hand)
else (face, faces) )
ordered = sorted(hand, key=lambda card: (f.index(card.face), card.suit))
first, rest = ordered[0], ordered[1:]
if ' '.join(card.face for card in ordered) in fs:
return 'straight', ordered[-1].face
return False
def threeofakind(hand):
allfaces = [f for f,s in hand]
allftypes = set(allfaces)
if len(allftypes) <= 2:
return False
for f in allftypes:
if allfaces.count(f) == 3:
allftypes.remove(f)
return ('three-of-a-kind', [f] +
sorted(allftypes,
key=lambda f: face.index(f),
reverse=True))
else:
return False
def twopair(hand):
allfaces = [f for f,s in hand]
allftypes = set(allfaces)
pairs = [f for f in allftypes if allfaces.count(f) == 2]
if len(pairs) != 2:
return False
p0, p1 = pairs
other = [(allftypes - set(pairs)).pop()]
return 'two-pair', pairs + other if face.index(p0) > face.index(p1) else pairs[::-1] + other
def onepair(hand):
allfaces = [f for f,s in hand]
allftypes = set(allfaces)
pairs = [f for f in allftypes if allfaces.count(f) == 2]
if len(pairs) != 1:
return False
allftypes.remove(pairs[0])
return 'one-pair', pairs + sorted(allftypes,
key=lambda f: face.index(f),
reverse=True)
def highcard(hand):
allfaces = [f for f,s in hand]
return 'high-card', sorted(allfaces,
key=lambda f: face.index(f),
reverse=True)
handrankorder = (straightflush, fourofakind, fullhouse,
flush, straight, threeofakind,
twopair, onepair, highcard)
def rank(cards):
hand = handy(cards)
for ranker in handrankorder:
rank = ranker(hand)
if rank:
break
assert rank, "Invalid: Failed to rank cards: %r" % cards
return rank
def handy(cards='2♥ 2♦ 2♣ k♣ q♦'):
hand = []
for card in cards.split():
f, s = card[:-1], card[-1]
assert f in face, "Invalid: Don't understand card face %r" % f
assert s in suit, "Invalid: Don't understand card suit %r" % s
hand.append(Card(f, s))
assert len(hand) == 5, "Invalid: Must be 5 cards in a hand, not %i" % len(hand)
assert len(set(hand)) == 5, "Invalid: All cards in the hand must be unique %r" % cards
return hand
if __name__ == '__main__':
hands = ["2♥ 2♦ 2♣ k♣ q♦",
"2♥ 5♥ 7♦ 8♣ 9♠",
"a♥ 2♦ 3♣ 4♣ 5♦",
"2♥ 3♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 2♦ 3♣ 3♦",
"2♥ 7♥ 7♦ 7♣ 7♠",
"10♥ j♥ q♥ k♥ a♥"] + [
"4♥ 4♠ k♠ 5♦ 10♠",
"q♣ 10♣ 7♣ 6♣ 4♣",
]
print("%-18s %-15s %s" % ("HAND", "CATEGORY", "TIE-BREAKER"))
for cards in hands:
r = rank(cards)
print("%-18r %-15s %r" % (cards, r[0], r[1]))
- Output:
HAND CATEGORY TIE-BREAKER '2♥ 2♦ 2♣ k♣ q♦' three-of-a-kind ['2', 'k', 'q'] '2♥ 5♥ 7♦ 8♣ 9♠' high-card ['9', '8', '7', '5', '2'] 'a♥ 2♦ 3♣ 4♣ 5♦' straight '5' '2♥ 3♥ 2♦ 3♣ 3♦' full-house ['3', '2'] '2♥ 7♥ 2♦ 3♣ 3♦' two-pair ['3', '2', '7'] '2♥ 7♥ 7♦ 7♣ 7♠' four-of-a-kind ['7', '2'] '10♥ j♥ q♥ k♥ a♥' straight-flush 'a' '4♥ 4♠ k♠ 5♦ 10♠' one-pair ['4', 'k', '10', '5'] 'q♣ 10♣ 7♣ 6♣ 4♣' flush ['q', '10', '7', '6', '4']
Racket
#lang racket
(require (only-in srfi/1 car+cdr))
;;; --------------------------------------------------------------------------------------------------
;;; The analyser is first... the rest of it is prettiness surrounding strings and parsing!
;;; --------------------------------------------------------------------------------------------------
;; (cons f _) and (cons _ s) appear too frequently in patterns to not factor out
(define-match-expander F._ (λ (stx) (syntax-case stx () [(_ f) #'(cons f _)])))
(define-match-expander _.S (λ (stx) (syntax-case stx () [(_ s) #'(cons _ s)])))
;; Matches are easier when the cards are lined up by face: and I always put the cards in my hand with
;; the highest card on the left (should I be telling this?)... anyway face<? is written to leave high
;; cards on the left. There is no need to sort by suit, flushes are all-or-nothing
(define (face-sort hand)
(sort hand (match-lambda** [(_ 'joker) #f] [('joker _) #t] [((F._ f1) (F._ f2)) (> f1 f2)])))
;; even playing poker for money, I never managed to consistently determine what effect jokers were
;; having on my hand... so I'll do an exhaustive search of what's best!
;;
;; scoring hands allows us to choose a best value for joker(s)
;; hand-names provides an order (and therefore a score) for each of the available hands
(define hand-names (list 'five-of-a-kind 'straight-flush 'four-of-a-kind 'full-house 'flush 'straight
'three-of-a-kind 'two-pair 'one-pair 'high-card))
(define hand-order# (for/hash ((h hand-names) (i (in-range (add1 (length hand-names)) 0 -1)))
(values h i)))
;; The score of a hand is (its order*15^5)+(first tiebreaker*15^4)+(2nd tiebreaker*15^3)...
;; powers of 15 because we have a maxmium face value of 14 (ace) -- even though there are 13 cards
;; in a suit.
(define (calculate-score analysis)
(define-values (hand-name tiebreakers) (car+cdr analysis))
(for/sum ((n (in-naturals)) (tb (cons (hash-ref hand-order# hand-name -1) tiebreakers)))
(* tb (expt 15 (- 5 n)))))
;; score hand produces an analysis of a hand (which can then be returned to analyse-sorted-hand,
;; and a score that can be maximised by choosing the right jokers.
(define (score-hand hand . jokers) ; gives an orderable list of hands with tiebreakers
(define analysis (analyse-sorted-hand (face-sort (append jokers hand))))
(cons analysis (calculate-score analysis)))
;; if we have two (or more) jokers, they will be consumed by the recursive call to
;; analyse-sorted-hand score-hand
(define all-cards/promise (delay (for*/list ((f (in-range 2 15)) (s '(h d s c))) (cons f s))))
(define (best-jokered-hand cards) ; we've lost the first joker from cards
(define-values (best-hand _bhs)
(for*/fold ((best-hand #f) (best-score 0))
((joker (in-list (force all-cards/promise)))
(score (in-value (score-hand cards joker)))
#:when (> (cdr score) best-score))
(car+cdr score)))
best-hand)
;; we can abbreviate 2/3/4/5-of-a-kind 2-pair full-house with 2 and 3
(define-match-expander F*2 (λ (stx) (syntax-case stx () [(_ f) #'(list (F._ f) (F._ f))])))
(define-match-expander F*3 (λ (stx) (syntax-case stx () [(_ f) #'(list (F._ f) (F._ f) (F._ f))])))
;; note that flush? is cheaper to calculate than straight?, so do it first when we test for
;; straight-flush
(define flush?
(match-lambda [(and `(,(_.S s) ,(_.S s) ,(_.S s) ,(_.S s) ,(_.S s)) `(,(F._ fs) ...)) `(flush ,@fs)]
[_ #f]))
(define straight?
(match-lambda
;; '(straight 5) puts this at the bottom of the pile w.r.t the ordering of straights
[`(,(F._ 14) ,(F._ 5) ,(F._ 4) ,(F._ 3) ,(F._ 2)) '(straight 5)]
[`(,(F._ f5) ,(F._ f4) ,(F._ f3) ,(F._ f2) ,(F._ f1))
(and (= f1 (- f5 4)) (< f1 f2 f3 f4 f5) `(straight ,f5))]))
(define analyse-sorted-hand
(match-lambda
[(list 'joker cards ...) (best-jokered-hand cards)]
[`(,@(F*3 f) ,@(F*2 f)) `(five-of-a-kind ,f)]
;; get "top" from the straight. a the top card of the flush when there is a (straight 5) will
;; be the ace ... putting it in the wrong place for the ordering.
[(and (? flush?) (app straight? (list 'straight top _ ...))) `(straight-flush ,top)]
[(or `(,@(F*2 f) ,@(F*2 f) ,_) `(,_ ,@(F*2 f) ,@(F*2 f))) `(four-of-a-kind ,f)]
[(or `(,@(F*3 fh) ,@(F*2 fl)) `(,@(F*2 fh) ,@(F*3 fl))) `(full-house ,fh, fl)]
[(app flush? (and rv (list 'flush _ ...))) rv]
[(app straight? (and rv (list 'straight _ ...))) rv]
;; pairs and threes may be padded to the left, middle and right with tie-breakers; the lists of
;; which we will call l, m and r, respectively (four and 5-of-a-kind don't need tiebreaking,
;; they're well hard!)
[`(,(F._ l) ... ,@(F*3 f) ,(F._ r) ...) `(three-of-a-kind ,f ,@l ,@r)]
[`(,(F._ l) ... ,@(F*2 f1) ,(F._ m) ... ,@(F*2 f2) ,(F._ r) ...) `(two-pair ,f1 ,f2 ,@l ,@m ,@r)]
[`(,(F._ l) ... ,@(F*2 f) ,(F._ r) ...) `(one-pair ,f ,@l ,@r)]
[`(,(F._ f) ...) `(high-card ,@f)]
[hand (error 'invalid-hand hand)]))
(define (analyse-hand/string hand-string)
(analyse-sorted-hand (face-sort (string->hand hand-string))))
;;; --------------------------------------------------------------------------------------------------
;;; Strings to cards, cards to strings -- that kind of thing
;;; --------------------------------------------------------------------------------------------------
(define suit->unicode (match-lambda ('h "♥") ('d "♦") ('c "♣") ('s "♠") (x x)))
(define unicode->suit (match-lambda ("♥" 'h) ("♦" 'd) ("♣" 'c) ("♠" 's) (x x)))
(define (face->number f)
(match (string-upcase f)
["T" 10] ["J" 11] ["Q" 12] ["K" 13] ["A" 14] [(app string->number (? number? n)) n] [else 0]))
(define number->face (match-lambda (10 "T") (11 "J") (12 "Q") (13 "K") (14 "A") ((app ~s x) x)))
(define string->card
(match-lambda
("joker" 'joker)
((regexp #px"^(.*)(.)$" (list _ (app face->number num) (app unicode->suit suit)))
(cons num suit))))
(define (string->hand str)
(map string->card (regexp-split #rx" +" (string-trim str))))
(define card->string
(match-lambda ['joker "[]"]
[(cons (app number->face f) (app suit->unicode s)) (format "~a~a" f s)]))
(define (hand->string h)
(string-join (map card->string h) " "))
;; used for both testing and output
(define e.g.-hands
(list " 2♥ 2♦ 2♣ k♣ q♦" " 2♥ 5♥ 7♦ 8♣ 9♠" " a♥ 2♦ 3♣ 4♣ 5♦" "10♥ j♦ q♣ k♣ a♦"
" 2♥ 3♥ 2♦ 3♣ 3♦" " 2♥ 7♥ 2♦ 3♣ 3♦" " 2♥ 7♥ 7♦ 7♣ 7♠" "10♥ j♥ q♥ k♥ a♥"
" 4♥ 4♠ k♠ 5♦ 10♠" " q♣ 10♣ 7♣ 6♣ 4♣"
" joker 2♦ 2♠ k♠ q♦" " joker 5♥ 7♦ 8♠ 9♦" " joker 2♦ 3♠ 4♠ 5♠"
" joker 3♥ 2♦ 3♠ 3♦" " joker 7♥ 2♦ 3♠ 3♦" " joker 7♥ 7♦ 7♠ 7♣"
" joker j♥ q♥ k♥ A♥" " joker 4♣ k♣ 5♦ 10♠" " joker k♣ 7♣ 6♣ 4♣"
" joker 2♦ joker 4♠ 5♠" " joker Q♦ joker A♠ 10♠" " joker Q♦ joker A♦ 10♦"
" joker 2♦ 2♠ joker q♦"))
;;; --------------------------------------------------------------------------------------------------
;;; Main and test modules
;;; --------------------------------------------------------------------------------------------------
(module+ main
(define scored-hands
(for/list ((h (map string->hand e.g.-hands)))
(define-values (analysis score) (car+cdr (score-hand h)))
(list h analysis score)))
(for ((a.s (sort scored-hands > #:key third)))
(match-define (list (app hand->string h) a _) a.s)
(printf "~a: ~a ~a" h (~a (first a) #:min-width 15) (number->face (second a)))
(when (pair? (cddr a)) (printf " [tiebreak: ~a]" (string-join (map number->face (cddr a)) ", ")))
(newline)))
(module+ test
(require rackunit)
(let ((e.g.-strght-flsh '((14 . h) (13 . h) (12 . h) (11 . h) (10 . h))))
(check-match (straight? e.g.-strght-flsh) '(straight 14))
(check-match (flush? e.g.-strght-flsh) '(flush 14 13 12 11 10))
(check-match e.g.-strght-flsh (and (? flush?) (app straight? (list 'straight top _ ...)))))
(define expected-results
'((three-of-a-kind 2 13 12)
(high-card 9 8 7 5 2) (straight 5) (straight 14) (full-house 3 2) (two-pair 3 2 7)
(four-of-a-kind 7) (straight-flush 14) (one-pair 4 13 10 5) (flush 12 10 7 6 4)
(three-of-a-kind 2 13 12) (straight 9) (straight 6) (four-of-a-kind 3) (three-of-a-kind 3 7 2)
(five-of-a-kind 7) (straight-flush 14) (one-pair 13 10 5 4) (flush 14 13 7 6 4) (straight 6)
(straight 14) (straight-flush 14) (four-of-a-kind 2)))
(for ((h e.g.-hands) (r expected-results)) (check-equal? (analyse-hand/string h) r)))
- Output:
[] 7♥ 7♦ 7♠ 7♣: five-of-a-kind 7 T♥ J♥ Q♥ K♥ A♥: straight-flush A [] J♥ Q♥ K♥ A♥: straight-flush A [] Q♦ [] A♦ T♦: straight-flush A 2♥ 7♥ 7♦ 7♣ 7♠: four-of-a-kind 7 [] 3♥ 2♦ 3♠ 3♦: four-of-a-kind 3 [] 2♦ 2♠ [] Q♦: four-of-a-kind 2 2♥ 3♥ 2♦ 3♣ 3♦: full-house 3 [tiebreak: 2] [] K♣ 7♣ 6♣ 4♣: flush A [tiebreak: K, 7, 6, 4] Q♣ T♣ 7♣ 6♣ 4♣: flush Q [tiebreak: T, 7, 6, 4] T♥ J♦ Q♣ K♣ A♦: straight A [] Q♦ [] A♠ T♠: straight A [] 5♥ 7♦ 8♠ 9♦: straight 9 [] 2♦ 3♠ 4♠ 5♠: straight 6 [] 2♦ [] 4♠ 5♠: straight 6 A♥ 2♦ 3♣ 4♣ 5♦: straight 5 [] 7♥ 2♦ 3♠ 3♦: three-of-a-kind 3 [tiebreak: 7, 2] 2♥ 2♦ 2♣ K♣ Q♦: three-of-a-kind 2 [tiebreak: K, Q] [] 2♦ 2♠ K♠ Q♦: three-of-a-kind 2 [tiebreak: K, Q] 2♥ 7♥ 2♦ 3♣ 3♦: two-pair 3 [tiebreak: 2, 7] [] 4♣ K♣ 5♦ T♠: one-pair K [tiebreak: T, 5, 4] 4♥ 4♠ K♠ 5♦ T♠: one-pair 4 [tiebreak: K, T, 5] 2♥ 5♥ 7♦ 8♣ 9♠: high-card 9 [tiebreak: 8, 7, 5, 2]
Raku
(formerly Perl 6) This solution handles jokers. It has been written to use a Raku grammar.
use v6;
grammar PokerHand {
# Raku Grammar to parse and rank 5-card poker hands
# E.g. PokerHand.parse("2♥ 3♥ 2♦ 3♣ 3♦");
# 2013-12-21: handle 'joker' wildcards; maximum of two
rule TOP {
:my %*PLAYED;
{ %*PLAYED = () }
[ <face-card> | <joker> ]**5
}
token face-card {<face><suit> <?{
my $card = ~$/.lc;
# disallow duplicates
++%*PLAYED{$card} <= 1;
}>
}
token joker {:i 'joker' <?{
my $card = ~$/.lc;
# allow two jokers in a hand
++%*PLAYED{$card} <= 2;
}>
}
token face {:i <[2..9 jqka]> | 10 }
token suit {<[♥ ♦ ♣ ♠]>}
}
class PokerHand::Actions {
method TOP($/) {
my UInt @n = n-of-a-kind($/);
my $flush = 'flush' if flush($/);
my $straight = 'straight' if straight($/);
make rank(@n[0], @n[1], $flush, $straight);
}
multi sub rank(5,*@) { 'five-of-a-kind' }
multi sub rank($,$,'flush','straight') { 'straight-flush' }
multi sub rank(4,*@) { 'four-of-a-kind' }
multi sub rank($,$,'flush',$) { 'flush' }
multi sub rank($,$,$,'straight') { 'straight' }
multi sub rank(3,2,*@) { 'full-house' }
multi sub rank(3,*@) { 'three-of-a-kind' }
multi sub rank(2,2,*@) { 'two-pair' }
multi sub rank(2,*@) { 'one-pair' }
multi sub rank(*@) { 'high-card' }
sub n-of-a-kind($/) {
my %faces := bag @<face-card>.map: -> $/ {~$<face>.lc};
my @counts = %faces.values.sort.reverse;
@counts[0] += @<joker>;
return @counts;
}
sub flush($/) {
my @suits = unique @<face-card>.map: -> $/ {~$<suit>};
return +@suits == 1;
}
sub straight($/) {
# allow both ace-low and ace-high straights
constant @Faces = [ "a 2 3 4 5 6 7 8 9 10 j q k a".split: ' ' ];
constant @Possible-Straights = [ (4 ..^ @Faces).map: { set @Faces[$_-4 .. $_] } ];
my $faces = set @<face-card>.map: -> $/ {~$<face>.lc};
my $jokers = +@<joker>;
return ?( @Possible-Straights.first: { +($faces ∩ $_) + $jokers == 5 } );
}
}
my PokerHand::Actions $actions .= new;
for ("2♥ 2♦ 2♣ k♣ q♦", # three-of-a-kind
"2♥ 5♥ 7♦ 8♣ 9♠", # high-card
"a♥ 2♦ 3♣ 4♣ 5♦", # straight
"2♥ 3♥ 2♦ 3♣ 3♦", # full-house
"2♥ 7♥ 2♦ 3♣ 3♦", # two-pair
"2♥ 7♥ 7♦ 7♣ 7♠", # four-of-a-kind
"10♥ j♥ q♥ k♥ a♥", # straight-flush
"4♥ 4♠ k♠ 5♦ 10♠", # one-pair
"q♣ 10♣ 7♣ 6♣ 4♣", # flush
"a♥ a♥ 3♣ 4♣ 5♦", # invalid
## EXTRA CREDIT ##
"joker 2♦ 2♠ k♠ q♦", # three-of-a-kind
"joker 5♥ 7♦ 8♠ 9♦", # straight
"joker 2♦ 3♠ 4♠ 5♠", # straight
"joker 3♥ 2♦ 3♠ 3♦", # four-of-a-kind
"joker 7♥ 2♦ 3♠ 3♦", # three-of-a-kind
"joker 7♥ 7♦ 7♠ 7♣", # five-of-a-kind
"joker j♥ q♥ k♥ A♥", # straight-flush
"joker 4♣ k♣ 5♦ 10♠", # one-pair
"joker k♣ 7♣ 6♣ 4♣", # flush
"joker 2♦ joker 4♠ 5♠", # straight
"joker Q♦ joker A♠ 10♠", # straight
"joker Q♦ joker A♦ 10♦", # straight-flush
"joker 2♦ 2♠ joker q♦", # four of a kind
) {
my $rank = do with PokerHand.parse($_, :$actions) {
.ast;
}
else {
'invalid';
}
say "$_: $rank";
}
- Output:
2♥ 2♦ 2♣ k♣ q♦: three-of-a-kind 2♥ 5♠ 7♦ 8♣ 9♠: high-card a♠ 2♦ 3♣ 4♣ 5♦: straight 2♥ 3♠ 2♦ 3♣ 3♦: full-house 2♥ 7♠ 2♦ 3♣ 3♦: two-pair 2♥ 7♥ 7♦ 7♣ 7♠: four-of-a-kind 10♠ j♠ q♠ k♠ a♠: straight-flush 4♥ 4♠ k♠ 5♦ 10♠: one-pair q♣ 10♣ 7♣ 6♣ 4♣: flush a♥ a♥ 3♣ 4♣ 5♦: invalid joker 2♦ 2♠ k♠ q♦: three-of-a-kind joker 5♠ 7♦ 8♠ 9♦: straight joker 2♦ 3♠ 4♠ 5♠: straight joker 3♥ 2♦ 3♠ 3♦: four-of-a-kind joker 7♥ 2♦ 3♠ 3♦: three-of-a-kind joker 7♥ 7♦ 7♠ 7♣: five-of-a-kind joker j♠ q♠ k♠ A♠: straight-flush joker 4♣ k♣ 5♦ 10♠: one-pair joker k♣ 7♣ 6♣ 4♣: flush joker 2♦ joker 4♠ 5♠: straight joker Q♦ joker A♠ 10♠: straight joker Q♦ joker A♦ 10♦: straight-flush joker 2♦ 2♠ joker q♦: four-of-a-kind
REXX
version 1
/* REXX ---------------------------------------------------------------
* 10.12.2013 Walter Pachl
*--------------------------------------------------------------------*/
d.1='2h 2d 2s ks qd'; x.1='three-of-a-kind'
d.2='2h 5h 7d 8s 9d'; x.2='high-card'
d.3='ah 2d 3s 4s 5s'; x.3='straight'
d.4='2h 3h 2d 3s 3d'; x.4='full-house'
d.5='2h 7h 2d 3s 3d'; x.5='two-pair'
d.6='2h 7h 7d 7s 7c'; x.6='four-of-a-kind'
d.7='th jh qh kh ah'; x.7='straight-flush'
d.8='4h 4c kc 5d tc'; x.8='one-pair'
d.9='qc tc 7c 6c 4c'; x.9='flush'
d.10='ah 2h 3h 4h'
d.11='ah 2h 3h 4h 5h 6h'
d.12='2h 2h 3h 4h 5h'
d.13='xh 2h 3h 4h 5h'
d.14='2x 2h 3h 4h 5h'
Do ci=1 To 14
Call poker d.ci,x.ci
end
Exit
poker:
Parse Arg deck,expected
have.=0
f.=0; fmax=0
s.=0; smax=0
cnt.=0
If words(deck)<5 Then Return err('less than 5 cards')
If words(deck)>5 Then Return err('more than 5 cards')
Do i=1 To 5
c=word(deck,i)
Parse Var c f +1 s
If have.f.s=1 Then Return err('duplicate card:' c)
have.f.s=1
m=pos(f,'a23456789tjqk')
If m=0 Then Return err('invalid face' f 'in' c)
cnt.m=cnt.m+1
n=pos(s,'hdcs')
If n=0 Then Return err('invalid suit' s 'in' c)
f.m=f.m+1; fmax=max(fmax,f.m)
s.n=s.n+1; smax=max(smax,s.n)
End
cntl=''
cnt.14=cnt.1
Do i=1 To 14
cntl=cntl||cnt.i
End
Select
When fmax=4 Then res='four-of-a-kind'
When fmax=3 Then Do
If x_pair() Then
res='full-house'
Else
res='three-of-a-kind'
End
When fmax=2 Then Do
If x_2pair() Then
res='two-pair'
Else
res='one-pair'
End
When smax=5 Then Do
If x_street() Then
res='straight-flush'
Else
res='flush'
End
When x_street() Then
res='straight'
Otherwise
res='high-card'
End
Say deck res
If res<>expected Then
Say copies(' ',14) expected
Return
x_pair:
Do p=1 To 13
If f.p=2 Then return 1
End
Return 0
x_2pair:
pp=0
Do p=1 To 13
If f.p=2 Then pp=pp+1
End
Return pp=2
x_street:
Return pos('11111',cntl)>0
err:
Say deck 'Error:' arg(1)
Return 0
- Output:
2h 2d 2s ks qd three-of-a-kind 2h 5h 7d 8s 9d high-card ah 2d 3s 4s 5s straight 2h 3h 2d 3s 3d full-house 2h 7h 2d 3s 3d two-pair 2h 7h 7d 7s 7c four-of-a-kind th jh qh kh ah straight-flush 4h 4c kc 5d tc one-pair qc tc 7c 6c 4c flush ah 2h 3h 4h Error: less than 5 cards ah 2h 3h 4h 5h 6h Error: more than 5 cards 2h 2h 3h 4h 5h Error: duplicate card: 2h xh 2h 3h 4h 5h Error: invalid face x in xh 2x 2h 3h 4h 5h Error: invalid suit x in 2x
version 2 with suit glyphs
This REXX version supports:
- upper/lower/mixed case for suits and pips
- allows commas or blanks for card separation
- alternate names for aces and tens
- alphabetic letters for suits and/or glyphs
- specification of number of cards in a hand
- the dealt hands can be in a file (blank lines are ignored)
- dealt hands in the file can have comments after a semicolon (;)
/*REXX program analyzes an N─card poker hand, and displays what the poker hand is. */
parse arg iFID .; if iFID=='' | iFID=="," then iFID= 'POKERHAN.DAT'
/* [↓] read the poker hands dealt. */
do while lines(iFID)\==0; ox= linein(iFID); if ox='' then iterate
say right(ox, max(30, length(ox) ) ) ' ◄─── ' analyze(ox)
end /*while*/ /* [↑] analyze/validate the poker hand*/
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
analyze: procedure; arg x ';',mc; hand= translate(x, '♥♦♣♠1', "HDCSA,"); flush= 0
kinds= 0; suit.= 0; pairs= 0; @.= 0; run= copies(0, 13); pips= run
if mc=='' then mc= 5; n= words(hand); if n\==mc then return 'invalid'
/* [↓] PIP can be 1 or 2 characters.*/
do j=1 for n; _= word(hand, j) /*obtain a card from the dealt hand. */
pip= left(_, length(_) - 1); ws= right(_, 1) /*obtain the card's pip; and the suit.*/
if pip==10 then pip= 'T' /*allow an alternate form for a "TEN". */
@._= @._ + 1 /*bump the card counter for this hand. */
#= pos(pip, 123456789TJQK) /*obtain the pip index for the card. */
if pos(ws, "♥♣♦♠")==0 then return 'invalid suit in card:' _
if #==0 then return 'invalid pip in card:' _
if @._\==1 then return 'invalid, duplicate card:' _
suit.ws= suit.ws + 1 /*count the suits for a possible flush.*/
flush= max(flush, suit.ws) /*count number of cards in the suits. */
run= overlay(., run, #) /*convert runs to a series of periods. */
_= substr(pips, #, 1) + 1 /*obtain the number of the pip in hand.*/
pips= overlay(_, pips, #) /*convert the pip to legitimate number.*/
kinds= max(kinds, _) /*convert certain pips to their number.*/
end /*i*/ /* [↑] keep track of N─of─a─kind. */
run= run || left(run, 1) /*An ace can be high ─or─ low. */
pairs= countstr(2, pips) /*count number of pairs (2s in PIPS).*/
straight= pos(....., run || left(run, 1) ) \== 0 /*does the RUN contains a straight? */
if flush==5 & straight then return 'straight-flush'
if kinds==4 then return 'four-of-a-kind'
if kinds==3 & pairs==1 then return 'full-house'
if flush==5 then return 'flush'
if straight then return 'straight'
if kinds==3 then return 'three-of-a-kind'
if kinds==2 & pairs==2 then return 'two-pair'
if kinds==2 then return 'one-pair'
return 'high-card'
Programming note: some older REXXes don't have the countstr BIF, so that REXX statement (above, line 48) can be replaced with:
pairs= 13 - length( space( translate( pips, , 2), 0) ) /*count # of 2's in PIPS.*/
- input file:
2♥ 2♦ 2♠ k♠ q♦ 2♥ 5♥ 7♦ 8♠ 9♦ a♥ 2♦ 3♠ 4♠ 5♠ 2♥ 3♥ 2♦ 3♠ 3♦ 2♥ 7♥ 2♦ 3♠ 3♦ 2♥ 7♥ 7♦ 7♠ 7♣ 10♥ j♥ q♥ k♥ A♥ 4♥ 4♣ k♣ 5♦ 10♠ q♣ t♣ 7♣ 6♣ 4♣ J♥ Q♦ K♠ A♠ 10♠ ah 2h 3h 4h
- output when using the (above) input file
2♥ 2♦ 2♠ k♠ q♦ ◄─── three-of-a-kind
2♥ 5♥ 7♦ 8♠ 9♦ ◄─── high-card
a♥ 2♦ 3♠ 4♠ 5♠ ◄─── straight
2♥ 3♥ 2♦ 3♠ 3♦ ◄─── full-house
2♥ 7♥ 2♦ 3♠ 3♦ ◄─── two-pair
2♥ 7♥ 7♦ 7♠ 7♣ ◄─── four-of-a-kind
10♥ j♥ q♥ k♥ A♥ ◄─── straight-flush
4♥ 4♣ k♣ 5♦ 10♠ ◄─── one-pair
q♣ t♣ 7♣ 6♣ 4♣ ◄─── flush
J♥ Q♦ K♠ A♠ 10♠ ◄─── straight
ah 2h 3h 4h ◄─── invalid
version 3 with suit glyphs and jokers
This REXX version has three additional features:
- "invalid" hands have additional diagnostic information
- supports up to two jokers
- the joker card may be abbreviated (and can be in upper/lower/mixed case)
/*REXX program analyzes an N-card poker hand, and displays what the poker hand is, */
/*──────────────────────────────────────────── poker hands may contain up to two jokers.*/
parse arg iFID .; if iFID=='' | iFID=="," then iFID= 'POKERHAJ.DAT'
/* [↓] read the poker hands dealt. */
do while lines(iFID)\==0; ox= linein(iFID); if ox='' then iterate
say right(ox, max(30, length(ox) ) ) ' ◄─── ' analyze(ox)
end /*while*/ /* [↑] analyze/validate the poker hand*/
exit /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
analyze: procedure; arg x ';',mc; hand=translate(x, '♥♦♣♠1', "HDCSA,"); flush= 0
kinds= 0; suit.= 0; pairs= 0; @.= 0; run= copies(0 ,13); pips= run
if mc=='' then mc= 5; n= words(hand) /*N is the number of cards in hand. */
if n\==mc then return 'invalid number of cards, must be' mc
/* [↓] the PIP can be 1 or 2 chars. */
do j=1 for n; _= word(hand, j) /*obtain a card from the dealt hand. */
pip= left(_, length(_) - 1); ws= right(_, 1) /*obtain card's pip; obtain card's suit*/
if pip==10 then pip= 'T' /*allow alternate form for a TEN pip.*/
if abbrev('JOKER', _, 1) then _= "JK" /*allow altername forms of JOKER names.*/
@._= @._ + 1 /*bump the card counter for this hand. */
#= pos(pip, 123456789TJQK) /*obtain the pip index for the card. */
if _=='JK' then do; if @.j>2 then return 'invalid, too many jokers'
iterate
end
if pos(ws, "♥♣♦♠")==0 then return 'invalid suit in card:' _
if #==0 then return 'invalid pip in card:' _
if @._\==1 then return 'invalid, duplicate card:' _
suit.ws= suit.ws + 1 /*count the suits for a possible flush.*/
flush= max(flush, suit.ws) /*count number of cards in the suits. */
run= overlay(., run, #) /*convert runs to a series of periods. */
_= substr(pips, #, 1) + 1 /*obtain the number of the pip in hand.*/
pips= overlay(_, pips, #) /*convert the pip to legitimate number.*/
kinds= max(kinds, _) /*convert certain pips to their number.*/
end /*i*/ /* [↑] keep track of N─of─a─kind. */
run= run || left(run, 1) /*An ace can be high ─or─ low. */
jok= @.jk; kinds= kinds+jok; flush= flush+jok /*N─of─a─kind; adjustments for jokers.*/
straight= pos(..... , run)\==0 |, /*does the RUN contain a straight? */
(pos(.... , run)\==0 & jok>=1) |, /* " " " " " " */
(pos(..0.. , run)\==0 & jok>=1) |, /* " " " " " " */
(pos(...0. , run)\==0 & jok>=1) |, /* " " " " " " */
(pos(.0... , run)\==0 & jok>=1) |, /* " " " " " " */
(pos(... , run)\==0 & jok>=2) |, /* " " " " " " */
(pos(..0. , run)\==0 & jok>=2) |, /* " " " " " " */
(pos(.0.. , run)\==0 & jok>=2) |, /* " " " " " " */
(pos(.00.. , run)\==0 & jok>=2) |, /* " " " " " " */
(pos(..00. , run)\==0 & jok>=2) |, /* " " " " " " */
(pos(.0.0. , run)\==0 & jok>=2) /* " " " " " " */
pairs= countstr(2, pips) /*count number of pairs (2s in PIPS). */
if jok\==0 then pairs= pairs - 1 /*adjust number of pairs with jokers. */
if kinds>=5 then return 'five-of-a-kind'
if flush>=5 & straight then return 'straight-flush'
if kinds>=4 then return 'four-of-a-kind'
if kinds>=3 & pairs>=1 then return 'full-house'
if flush>=5 then return 'flush'
if straight then return 'straight'
if kinds>=3 then return 'three-of-a-kind'
if kinds==2 & pairs==2 then return 'two-pair'
if kinds==2 then return 'one-pair'
return 'high-card'
Programming note: the method used for analyzing hands that contain jokers are limited to a maximum of two jokers.
A different methodology would be needed for a generic number of jokers (and/or wild cards [such as deuces and one─eyed jacks]).
- input file:
joker 2♦ 2♠ k♠ q♦
joker 5♥ 7♦ 8♠ 9♦
joker 2♦ 3♠ 4♠ 5♠
joker 3♥ 2♦ 3♠ 3♦
joker 7♥ 2♦ 3♠ 3♦
joker 7♥ 7♦ 7♠ 7♣
joker j♥ q♥ k♥ A♥
joker 4♣ k♣ 5♦ 10♠
joker t♣ 7♣ 6♣ 4♣
joker Q♦ K♠ A♠ 10♠
joker 2h 3h 4h
2♥ 2♦ 2♠ k♠ jok
2♥ 5♥ 7♦ 8♠ jok
a♥ 2♦ 5♠ 4♠ jok
2♥ 3♥ 2♦ 3♠ jok
2♥ 7♥ 2♦ 3♠ jok
2♥ 7♥ 7♦ 7♠ jok
10♥ j♥ q♥ k♥ jok
4♥ 4♣ k♣ 5♦ jok
q♣ t♣ 7♣ 6♣ jok
J♥ Q♦ K♠ A♠ jok
- output when using the (above) input file
joker 2♦ 2♠ k♠ q♦ ◄─── three-of-a-kind
joker 5♥ 7♦ 8♠ 9♦ ◄─── straight
joker 2♦ 3♠ 4♠ 5♠ ◄─── straight
joker 3♥ 2♦ 3♠ 3♦ ◄─── four-of-a-kind
joker 7♥ 2♦ 3♠ 3♦ ◄─── three-of-a-kind
joker 7♥ 7♦ 7♠ 7♣ ◄─── five-of-a-kind
joker j♥ q♥ k♥ A♥ ◄─── straight-flush
joker 4♣ k♣ 5♦ 10♠ ◄─── one-pair
joker t♣ 7♣ 6♣ 4♣ ◄─── flush
joker Q♦ K♠ A♠ 10♠ ◄─── straight
joker 2h 3h 4h ◄─── invalid number of cards, must be 5
2♥ 2♦ 2♠ k♠ jok ◄─── four-of-a-kind
2♥ 5♥ 7♦ 8♠ jok ◄─── one-pair
a♥ 2♦ 5♠ 4♠ jok ◄─── straight
2♥ 3♥ 2♦ 3♠ jok ◄─── full-house
2♥ 7♥ 2♦ 3♠ jok ◄─── three-of-a-kind
2♥ 7♥ 7♦ 7♠ jok ◄─── four-of-a-kind
10♥ j♥ q♥ k♥ jok ◄─── straight-flush
4♥ 4♣ k♣ 5♦ jok ◄─── three-of-a-kind
q♣ t♣ 7♣ 6♣ jok ◄─── flush
J♥ Q♦ K♠ A♠ jok ◄─── straight
RPL
≪ → hand
≪ { }
1 15 FOR j
"A23456789TJQK" hand j DUP SUB POS 1 -
"CDHS" hand j 1 + DUP SUB POS 13 * +
+ 3 STEP
≫ ≫ 'HANDCODE' STO
≪ → diffs
≪ { } 1
1 4 FOR j
IF diffs j GET THEN + 1 ELSE 1 + END NEXT
+ SORT REVLIST 1 2 SUB
≫ ≫ 'GROUPS' STO
≪ DUP ΠLIST 1 ==
SWAP { 9 1 1 1 } 1 == OR
≫ 'STRAIGHT?' STO
≪ HANDCODE
DUP 13 / IP ≪ == ≫ DOSUBS ΠLIST
SWAP 13 MOD SORT ΔLIST
DUP GROUPS SWAP STRAIGHT?
→ flush groups straight
≪ CASE
straight THEN flush "Straight flush" "Straight" IFTE END
groups { 4 1 } == THEN "Four of a kind" END
groups { 3 2 } == THEN "Full house" END
groups { 3 1 } == THEN "Three of a kind" END
groups { 2 2 } == THEN "Two pairs" END
groups { 2 1 } == THEN "One pair" END
flush "Flush" "High card" IFTE END
≫ ≫ '→HAND' STO
{ "2H 2D 2S KS QD" "2H 5H 7D 8S 9D" "AH 2D 3S 4S 5S" "2H 3H 2D 3S 3D" "2H 7H 2D 3S 3D" "2H 7H 7D 7S 7C" "TH JH QH KH AH" "4H 4C KC 5D TC" "QC TC 7C 6C 4C" }
1 ≪ →HAND ≫ DOLIST
- Output:
1: { "Three of a kind" "High card" "Straight" "Full house" "Two pairs" "Four of a kind" "Straight flush" "One pair" "Flush" }
Ruby
Joker-less hands are sorted high to low.
class Card
include Comparable
attr_accessor :ordinal
attr_reader :suit, :face
SUITS = %i(♥ ♦ ♣ ♠)
FACES = %i(2 3 4 5 6 7 8 9 10 j q k a)
def initialize(str)
@face, @suit = parse(str)
@ordinal = FACES.index(@face)
end
def <=> (other) #used for sorting
self.ordinal <=> other.ordinal
end
def to_s
"#@face#@suit"
end
private
def parse(str)
face, suit = str.chop.to_sym, str[-1].to_sym
raise ArgumentError, "invalid card: #{str}" unless FACES.include?(face) && SUITS.include?(suit)
[face, suit]
end
end
class Hand
include Comparable
attr_reader :cards, :rank
RANKS = %i(high-card one-pair two-pair three-of-a-kind straight flush
full-house four-of-a-kind straight-flush five-of-a-kind)
WHEEL_FACES = %i(2 3 4 5 a)
def initialize(str_of_cards)
@cards = str_of_cards.downcase.tr(',',' ').split.map{|str| Card.new(str)}
grouped = @cards.group_by(&:face).values
@face_pattern = grouped.map(&:size).sort
@rank = categorize
@rank_num = RANKS.index(@rank)
@tiebreaker = grouped.map{|ar| [ar.size, ar.first.ordinal]}.sort.reverse
end
def <=> (other) # used for sorting and comparing
self.compare_value <=> other.compare_value
end
def to_s
@cards.map(&:to_s).join(" ")
end
protected # accessible for Hands
def compare_value
[@rank_num, @tiebreaker]
end
private
def one_suit?
@cards.map(&:suit).uniq.size == 1
end
def consecutive?
sort.each_cons(2).all? {|c1,c2| c2.ordinal - c1.ordinal == 1 }
end
def sort
if @cards.sort.map(&:face) == WHEEL_FACES
@cards.detect {|c| c.face == :a}.ordinal = -1
end
@cards.sort
end
def categorize
if consecutive?
one_suit? ? :'straight-flush' : :straight
elsif one_suit?
:flush
else
case @face_pattern
when [1,1,1,1,1] then :'high-card'
when [1,1,1,2] then :'one-pair'
when [1,2,2] then :'two-pair'
when [1,1,3] then :'three-of-a-kind'
when [2,3] then :'full-house'
when [1,4] then :'four-of-a-kind'
when [5] then :'five-of-a-kind'
end
end
end
end
# Demo
test_hands = <<EOS
2♥ 2♦ 2♣ k♣ q♦
2♥ 5♥ 7♦ 8♣ 9♠
a♥ 2♦ 3♣ 4♣ 5♦
2♥ 3♥ 2♦ 3♣ 3♦
2♥ 7♥ 2♦ 3♣ 3♦
2♥ 6♥ 2♦ 3♣ 3♦
10♥ j♥ q♥ k♥ a♥
4♥ 4♠ k♠ 2♦ 10♠
4♥ 4♠ k♠ 3♦ 10♠
q♣ 10♣ 7♣ 6♣ 4♣
q♣ 10♣ 7♣ 6♣ 3♣
9♥ 10♥ q♥ k♥ j♣
2♥ 3♥ 4♥ 5♥ a♥
2♥ 2♥ 2♦ 3♣ 3♦
EOS
hands = test_hands.each_line.map{|line| Hand.new(line) }
puts "High to low"
hands.sort.reverse.each{|hand| puts "#{hand}\t #{hand.rank}" }
puts
str = <<EOS
joker 2♦ 2♠ k♠ q♦
joker 5♥ 7♦ 8♠ 9♦
joker 2♦ 3♠ 4♠ 5♠
joker 3♥ 2♦ 3♠ 3♦
joker 7♥ 2♦ 3♠ 3♦
joker 7♥ 7♦ 7♠ 7♣
joker j♥ q♥ k♥ A♥
joker 4♣ k♣ 5♦ 10♠
joker k♣ 7♣ 6♣ 4♣
joker 2♦ joker 4♠ 5♠
joker Q♦ joker A♠ 10♠
joker Q♦ joker A♦ 10♦
joker 2♦ 2♠ joker q♦
EOS
# Neither the Card nor the Hand class supports jokers
# but since hands are comparable, they are also sortable.
# Try every card from a deck for a joker and pick the largest hand:
DECK = Card::FACES.product(Card::SUITS).map(&:join)
str.each_line do |line|
cards_in_arrays = line.split.map{|c| c == "joker" ? DECK.dup : [c]} #joker is array of all cards
all_tries = cards_in_arrays.shift.product(*cards_in_arrays).map{|ar| Hand.new(ar.join" ")} #calculate the Whatshisname product
best = all_tries.max
puts "#{line.strip}: #{best.rank}"
end
- Output:
High to low 10♥ j♥ q♥ k♥ a♥ straight-flush 2♥ 3♥ 4♥ 5♥ a♥ straight-flush 2♥ 3♥ 2♦ 3♣ 3♦ full-house 2♥ 2♥ 2♦ 3♣ 3♦ full-house q♣ 10♣ 7♣ 6♣ 4♣ flush q♣ 10♣ 7♣ 6♣ 3♣ flush 9♥ 10♥ q♥ k♥ j♣ straight a♥ 2♦ 3♣ 4♣ 5♦ straight 2♥ 2♦ 2♣ k♣ q♦ three-of-a-kind 2♥ 7♥ 2♦ 3♣ 3♦ two-pair 2♥ 6♥ 2♦ 3♣ 3♦ two-pair 4♥ 4♠ k♠ 3♦ 10♠ one-pair 4♥ 4♠ k♠ 2♦ 10♠ one-pair 2♥ 5♥ 7♦ 8♣ 9♠ high-card joker 2♦ 2♠ k♠ q♦: three-of-a-kind joker 5♥ 7♦ 8♠ 9♦: straight joker 2♦ 3♠ 4♠ 5♠: straight joker 3♥ 2♦ 3♠ 3♦: four-of-a-kind joker 7♥ 2♦ 3♠ 3♦: three-of-a-kind joker 7♥ 7♦ 7♠ 7♣: five-of-a-kind joker j♥ q♥ k♥ A♥: straight-flush joker 4♣ k♣ 5♦ 10♠: one-pair joker k♣ 7♣ 6♣ 4♣: flush joker 2♦ joker 4♠ 5♠: straight joker Q♦ joker A♠ 10♠: straight joker Q♦ joker A♦ 10♦: straight-flush joker 2♦ 2♠ joker q♦: four-of-a-kind
Rust
Unicode version with jokers. Also checks for Royal Flush (AKQJ10 suited).
fn main() {
let hands = vec![
"🂡 🂮 🂭 🂫 🂪",
"🃏 🃂 🂢 🂮 🃍",
"🃏 🂵 🃇 🂨 🃉",
"🃏 🃂 🂣 🂤 🂥",
"🃏 🂳 🃂 🂣 🃃",
"🃏 🂷 🃂 🂣 🃃",
"🃏 🂷 🃇 🂧 🃗",
"🃏 🂻 🂽 🂾 🂱",
"🃏 🃔 🃞 🃅 🂪",
"🃏 🃞 🃗 🃖 🃔",
"🃏 🃂 🃟 🂤 🂥",
"🃏 🃍 🃟 🂡 🂪",
"🃏 🃍 🃟 🃁 🃊",
"🃏 🃂 🂢 🃟 🃍",
"🃏 🃂 🂢 🃍 🃍",
"🃂 🃞 🃍 🃁 🃊",
];
for hand in hands{
println!("{} {}", hand, poker_hand(hand));
}
}
fn poker_hand(cards: &str) -> &str {
let mut suits = vec![0u8; 4];
let mut faces = vec![0u8; 15];
let mut hand = vec![];
for card in cards.chars(){
if card == ' ' { continue; }
let values = get_card_value(card);
if values.0 < 14 && hand.contains(&values) {
return "invalid";
}
hand.push(values);
faces[values.0 as usize]+=1;
if values.1 >= 0 {
suits[values.1 as usize]+=1;
}
}
if hand.len()!=5 {
return "invalid";
}
faces[13] = faces[0]; //add ace-high count
let jokers = faces[14];
//count suits
let mut colors = suits.into_iter()
.filter(|&x| x > 0).collect::<Vec<_>>();
colors.sort_unstable();
colors[0] += jokers; // add joker suits to the highest one;
let is_flush = colors[0] == 5;
//straight
let mut is_straight = false;
//pointer to optimise some work
//avoids looking again at cards that were the start of a sequence
//as they cannot be part of another sequence
let mut ptr = 14;
while ptr>3{
let mut jokers_left = jokers;
let mut straight_cards = 0;
for i in (0..ptr).rev(){
if faces[i]==0 {
if jokers_left == 0 {break;}
jokers_left -= 1;
}
else if i==ptr-1 { ptr-=1; }
straight_cards+=1;
}
ptr-=1;
if straight_cards == 5 {
is_straight = true;
break;
}
}
//count values
let mut values = faces.into_iter().enumerate().take(14).filter(|&x| x.1>0).collect::<Vec<_>>();
//sort by quantity, then by value, high to low
values.sort_unstable_by(|a, b| if b.1 == a.1 { (b.0).cmp(&a.0) } else { (b.1).cmp(&a.1)} );
let first_group = values[0].1 + jokers;
let second_group = if values.len()>1 {values[1].1} else {0};
match (is_flush, is_straight, first_group, second_group){
(_,_,5,_) => "five-of-a-kind",
(true, true, _, _) => if ptr == 8 {"royal-flush"} else {"straight-flush"},
(_,_,4,_) => "four-of-a-kind",
(_,_,3,2) => "full-house",
(true,_,_,_) => "flush",
(_,true,_,_) => "straight",
(_,_,3,_) => "three-of-a-kind",
(_,_,2,2) => "two-pair",
(_,_,2,_) => "one-pair",
_ => "high-card"
}
}
fn get_card_value(card: char) -> (i8,i8) {
// transform glyph to face + suit, zero-indexed
let base = card as u32 - 0x1F0A1;
let mut suit = (base / 16) as i8;
let mut face = (base % 16) as i8;
if face > 11 && face < 14 { face-=1; } // Unicode has a Knight that we do not want
if face == 14 { suit = -1; } //jokers do not have a suit
(face, suit)
}
- Output:
🂡 🂮 🂭 🂫 🂪 royal-flush 🃏 🃂 🂢 🂮 🃍 three-of-a-kind 🃏 🂵 🃇 🂨 🃉 straight 🃏 🃂 🂣 🂤 🂥 straight 🃏 🂳 🃂 🂣 🃃 four-of-a-kind 🃏 🃂 🂢 🂮 🃍 three-of-a-kind 🃏 🂵 🃇 🂨 🃉 five-of-a-kind 🃏 🃂 🂣 🂤 🂥 straight-flush 🃏 🂳 🃂 🂣 🃃 one-pair 🃏 🃂 🂢 🂮 🃍 flush 🃏 🂵 🃇 🂨 🃉 straight 🃏 🃂 🂣 🂤 🂥 straight 🃏 🂳 🃂 🂣 🃃 straight-flush 🃏 🃂 🂢 🂮 🃍 four-of-a-kind 🃏 🂵 🃇 🂨 🃉 invalid 🃏 🃞 🃍 🃁 🃊 high-card
Scala
Including jokers, but not special suit characters. Aiming for readability more than performance.
val faces = "23456789TJQKA"
val suits = "CHSD"
sealed trait Card
object Joker extends Card
case class RealCard(face: Int, suit: Char) extends Card
val allRealCards = for {
face <- 0 until faces.size
suit <- suits
} yield RealCard(face, suit)
def parseCard(str: String): Card = {
if (str == "joker") {
Joker
} else {
RealCard(faces.indexOf(str(0)), str(1))
}
}
def parseHand(str: String): List[Card] = {
str.split(" ").map(parseCard).toList
}
trait HandType {
def name: String
def check(hand: List[RealCard]): Boolean
}
case class And(x: HandType, y: HandType, name: String) extends HandType {
def check(hand: List[RealCard]) = x.check(hand) && y.check(hand)
}
object Straight extends HandType {
val name = "straight"
def check(hand: List[RealCard]): Boolean = {
val faces = hand.map(_.face).toSet
faces.size == 5 && (faces.min == faces.max - 4 || faces == Set(0, 1, 2, 3, 12))
}
}
object Flush extends HandType {
val name = "flush"
def check(hand: List[RealCard]): Boolean = {
hand.map(_.suit).toSet.size == 1
}
}
case class NOfAKind(n: Int, name: String = "", nOccur: Int = 1) extends HandType {
def check(hand: List[RealCard]): Boolean = {
hand.groupBy(_.face).values.count(_.size == n) >= nOccur
}
}
val allHandTypes = List(
NOfAKind(5, "five-of-a-kind"),
And(Straight, Flush, "straight-flush"),
NOfAKind(4, "four-of-a-kind"),
And(NOfAKind(3), NOfAKind(2), "full-house"),
Flush,
Straight,
NOfAKind(3, "three-of-a-kind"),
NOfAKind(2, "two-pair", 2),
NOfAKind(2, "one-pair")
)
def possibleRealHands(hand: List[Card]): List[List[RealCard]] = {
val realCards = hand.collect { case r: RealCard => r }
val nJokers = hand.count(_ == Joker)
allRealCards.toList.combinations(nJokers).map(_ ++ realCards).toList
}
def analyzeHand(hand: List[Card]): String = {
val possibleHands = possibleRealHands(hand)
allHandTypes.find(t => possibleHands.exists(t.check)).map(_.name).getOrElse("high-card")
}
val testHands = List(
"2H 2D 2S KS QD",
"2H 5H 7D 8S 9D",
"AH 2D 3S 4S 5S",
"2H 3H 2D 3S 3D",
"2H 7H 2D 3S 3D",
"2H 7H 7D 7S 7C",
"TH JH QH KH AH",
"4H 4C KC 5D TC",
"QC TC 7C 6C 4C",
"QC TC 7C 7C TD",
"2H 2D 2S KS joker",
"2H 5H 7D 8S joker",
"AH 2D 3S 4S joker",
"2H 3H 2D 3S joker",
"2H 7H 2D 3S joker",
"2H 7H 7D joker joker",
"TH JH QH joker joker",
"4H 4C KC joker joker",
"QC TC 7C joker joker",
"QC TC 7H joker joker"
)
for (hand <- testHands) {
println(s"$hand -> ${analyzeHand(parseHand(hand))}")
}
- Output:
2H 2D 2S KS QD -> three-of-a-kind 2H 5H 7D 8S 9D -> high-card AH 2D 3S 4S 5S -> straight 2H 3H 2D 3S 3D -> full-house 2H 7H 2D 3S 3D -> two-pair 2H 7H 7D 7S 7C -> four-of-a-kind TH JH QH KH AH -> straight-flush 4H 4C KC 5D TC -> one-pair QC TC 7C 6C 4C -> flush QC TC 7C 7C TD -> two-pair 2H 2D 2S KS joker -> four-of-a-kind 2H 5H 7D 8S joker -> one-pair AH 2D 3S 4S joker -> straight 2H 3H 2D 3S joker -> full-house 2H 7H 2D 3S joker -> three-of-a-kind 2H 7H 7D joker joker -> four-of-a-kind TH JH QH joker joker -> straight-flush 4H 4C KC joker joker -> four-of-a-kind QC TC 7C joker joker -> flush QC TC 7H joker joker -> three-of-a-kind
Seed7
$ include "seed7_05.s7i";
include "console.s7i";
const string: face is "A23456789TJQK";
const string: suit is "♥♦♣♠";
const func string: analyzeHand (in array integer: faceCnt, in array integer: suitCnt) is func
result
var string: handValue is "";
local
var boolean: pair1 is FALSE;
var boolean: pair2 is FALSE;
var boolean: three is FALSE;
var boolean: four is FALSE;
var boolean: flush is FALSE;
var boolean: straight is FALSE;
var integer: sequence is 0;
var integer: x is 0;
begin
for x range 1 to 13 do
case faceCnt[x] of
when {2}: if pair1 then pair2 := TRUE; else pair1 := TRUE; end if;
when {3}: three := TRUE;
when {4}: four := TRUE;
end case;
end for;
for x range 1 to 4 until flush do
if suitCnt[x] = 5 then
flush := TRUE;
end if;
end for;
if not pair1 and not three and not four then
for x range 1 to 13 until sequence = 5 do
if faceCnt[x] <> 0 then incr(sequence); else sequence := 0; end if;
end for;
straight := sequence = 5 or (sequence = 4 and faceCnt[1] <> 0);
end if;
if straight and flush then handValue := "straight-flush";
elsif four then handValue := "four-of-a-kind";
elsif pair1 and three then handValue := "full-house";
elsif flush then handValue := "flush";
elsif straight then handValue := "straight";
elsif three then handValue := "three-of-a-kind";
elsif pair1 and pair2 then handValue := "two-pair";
elsif pair1 then handValue := "one-pair";
else handValue := "high-card";
end if;
end func;
const proc: analyze (in string: cards) is func
local
var array integer: faceCnt is 13 times 0;
var array integer: suitCnt is 4 times 0;
var string: card is "";
begin
for card range split(upper(cards), ' ') do
incr(faceCnt[pos(face, card[1])]);
incr(suitCnt[pos(suit, card[2])]);
end for;
writeln(cards <& ": " <& analyzeHand(faceCnt, suitCnt));
end func;
const proc: main is func
begin
OUT := STD_CONSOLE;
analyze("2♥ 2♦ 2♠ k♠ q♦");
analyze("2♥ 5♥ 7♦ 8♠ 9♦");
analyze("a♥ 2♦ 3♠ 4♠ 5♠");
analyze("2♥ 3♥ 2♦ 3♠ 3♦");
analyze("2♥ 7♥ 2♦ 3♠ 3♦");
analyze("2♥ 7♥ 7♦ 7♠ 7♣");
analyze("t♥ j♥ q♥ k♥ a♥");
analyze("4♥ 4♣ k♣ 5♦ t♣");
analyze("q♣ t♣ 7♣ 6♣ 4♣");
end func;- Output:
2♥ 2♦ 2♠ k♠ q♦: three-of-a-kind 2♥ 5♥ 7♦ 8♠ 9♦: high-card a♥ 2♦ 3♠ 4♠ 5♠: straight 2♥ 3♥ 2♦ 3♠ 3♦: full-house 2♥ 7♥ 2♦ 3♠ 3♦: two-pair 2♥ 7♥ 7♦ 7♠ 7♣: four-of-a-kind t♥ j♥ q♥ k♥ a♥: straight-flush 4♥ 4♣ k♣ 5♦ t♣: one-pair q♣ t♣ 7♣ 6♣ 4♣: flush
Standard ML
local
val rec ins = fn x : int*'a => fn [] => [x]
| ll as h::t => if #1 x<= (#1 h) then x::ll else h::ins x t
val rec acount = fn
(n,a::(b::t)) => if a=b then acount (n+1,b::t) else (n,a)::acount(1,b::t)
| (n,[t]) => [(n,t)]
in (* helper count and sort functions *)
val rec sortBy1st = fn [] => [] | h::t => ins h (sortBy1st t)
val addcount = fn ll => acount (1,ll)
end;
val showHand = fn input =>
let
exception Cheat of string
(* replace a j q k by their numbers *)
val translateCardstrings = fn inputstr =>
String.tokens (fn #" "=>true|_=>false) (String.translate (fn #"a"=>"1"| #"j"=>"11"| #"q"=>"12"| #"k"=>"13" | a=>str a ) inputstr )
(* parse numbers and characters into int*strings and order those *)
val parseFacesSuits = fn cardcodes =>
sortBy1st (List.map (fn el => (valOf (Int.fromString el ),String.extract (el,String.size el -1,NONE) )) cardcodes )
handle Option => raise Cheat "parse"
(* replace the list of face numbers by a list of every face with its count and order it / descending count *)
val countAndSort =fn li =>
let val hand = ListPair.unzip li in (rev (sortBy1st (addcount (#1 hand))) , #2 hand ) end;
val score = fn
( (4,_)::t , _ ) => "four-of-a-kind"
| ( (3,_)::(2,_)::t , _ ) => "full-house"
| ( (3,_)::t,_) => "three-of-a-kind"
| ( (2,_)::(2,_)::t,_) => "two-pair"
| ( (2,_)::t,_) => "one-pair"
| (x as (1,_)::t,ll) => if #2 (hd x ) - (#2 (hd (rev x))) =4 orelse ( #2 (hd (rev x)) = 1 andalso #2 (hd (tl (rev x))) =10 )
then
if List.all (fn x => hd ll=x) ll
then "straight-flush"
else "straight"
else if List.all (fn x => hd ll=x) ll then "flush" else "high-card"
| _ => "invalid"
(* return 'invalid' if any duplicates or invalid codes *)
val validate = fn lpair : (int * string) list =>
let val rec uniq = fn ([],y) =>true|(x,y) => List.filter (fn a=>a= hd x) y = [hd x] andalso uniq(tl x,y)
in
if List.all (fn x :int*string => #1 x > 0 andalso #1 x < 14 ) lpair
andalso List.all (fn (x) => Option.isSome ( List.find (fn a=> a= #2x) ["c","d","h","s"] ) ) lpair
andalso uniq (lpair ,lpair)
then lpair
else raise Cheat "value"
end
in
( score o countAndSort o validate o parseFacesSuits o translateCardstrings ) input handle Cheat ch => "invalid"
end;Example (interpreter):
val rec printio = fn
[] => ()
| s::t => (print (s^" : "); print ((showHand s)^"\n") before printio t) ;
printio
[ "2h 2d 2c kc qd" ,
"2h 5h 7d 8c 9s",
"ah 2d 3c 4c 5d" ,
"2h 3h 2d 3s 3d",
"2h 7h 2d 3c 3d",
"2h 7h 7d 7c 7s",
"10h jh qh kh ah",
"4h 4s ks 5d 10s",
"qc 10c 7c 6c 4c",
"ac ah ac ad 10h"] ;
2h 2d 2c kc qd : three-of-a-kind
2h 5h 7d 8c 9s : high-card
ah 2d 3c 4c 5d : straight
2h 3h 2d 3s 3d : full-house
2h 7h 2d 3c 3d : two-pair
2h 7h 7d 7c 7s : four-of-a-kind
10h jh qh kh ah : straight-flush
4h 4s ks 5d 10s : one-pair
qc 10c 7c 6c 4c : flush
ac ah ac ad 10h : invalid
val it = (): unitTcl
package require Tcl 8.6
namespace eval PokerHandAnalyser {
proc analyse {hand} {
set norm [Normalise $hand]
foreach type {
invalid straight-flush four-of-a-kind full-house flush straight
three-of-a-kind two-pair one-pair
} {
if {[Detect-$type $norm]} {
return $type
}
}
# Always possible to use high-card if the hand is legal at all
return high-card
}
# This normalises to an internal representation that is a list of pairs,
# where each pair is one number for the pips (ace == 14, king == 13,
# etc.) and another for the suit. This greatly simplifies detection.
proc Normalise {hand} {
set PipMap {j 11 q 12 k 13 a 14}
set SuitMap {♥ 2 h 2 ♦ 1 d 1 ♣ 0 c 0 ♠ 3 s 3}
set hand [string tolower $hand]
set cards [regexp -all -inline {(?:[akqj98765432]|10)[hdcs♥♦♣♠]} $hand]
lsort -command CompareCards [lmap c [string map {} $cards] {
list [string map $PipMap [string range $c 0 end-1]] \
[string map $SuitMap [string index $c end]]
}]
}
proc CompareCards {a b} {
lassign $a pipA suitA
lassign $b pipB suitB
expr {$pipA==$pipB ? $suitB-$suitA : $pipB-$pipA}
}
# Detection code. Note that the detectors all assume that the preceding
# detectors have been run first; this simplifies the logic a lot, but does
# mean that the individual detectors are not robust on their own.
proc Detect-invalid {hand} {
if {[llength $hand] != 5} {return 1}
foreach c $hand {
if {[incr seen($c)] > 1} {return 1}
}
return 0
}
proc Detect-straight-flush {hand} {
foreach c $hand {
lassign $c pip suit
if {[info exist prev] && $prev-1 != $pip} {
# Special case: ace low straight flush ("steel wheel")
if {$prev != 14 && $suit != 5} {
return 0
}
}
set prev $pip
incr seen($suit)
}
return [expr {[array size seen] == 1}]
}
proc Detect-four-of-a-kind {hand} {
foreach c $hand {
lassign $c pip suit
if {[incr seen($pip)] > 3} {return 1}
}
return 0
}
proc Detect-full-house {hand} {
foreach c $hand {
lassign $c pip suit
incr seen($pip)
}
return [expr {[array size seen] == 2}]
}
proc Detect-flush {hand} {
foreach c $hand {
lassign $c pip suit
incr seen($suit)
}
return [expr {[array size seen] == 1}]
}
proc Detect-straight {hand} {
foreach c $hand {
lassign $c pip suit
if {[info exist prev] && $prev-1 != $pip} {
# Special case: ace low straight ("wheel")
if {$prev != 14 && $suit != 5} {
return 0
}
}
set prev $pip
}
return 1
}
proc Detect-three-of-a-kind {hand} {
foreach c $hand {
lassign $c pip suit
if {[incr seen($pip)] > 2} {return 1}
}
return 0
}
proc Detect-two-pair {hand} {
set pairs 0
foreach c $hand {
lassign $c pip suit
if {[incr seen($pip)] > 1} {incr pairs}
}
return [expr {$pairs > 1}]
}
proc Detect-one-pair {hand} {
foreach c $hand {
lassign $c pip suit
if {[incr seen($pip)] > 1} {return 1}
}
return 0
}
}
Demonstrating:
foreach hand {
"2♥ 2♦ 2♣ k♣ q♦" "2♥ 5♥ 7♦ 8♣ 9♠" "a♥ 2♦ 3♣ 4♣ 5♦" "2♥ 3♥ 2♦ 3♣ 3♦"
"2♥ 7♥ 2♦ 3♣ 3♦" "2♥ 7♥ 7♦ 7♣ 7♠" "10♥ j♥ q♥ k♥ a♥" "4♥ 4♠ k♠ 5♦ 10♠"
"q♣ 10♣ 7♣ 6♣ 4♣"
} {
puts "${hand}: [PokerHandAnalyser::analyse $hand]"
}
- Output:
2♥ 2♦ 2♣ k♣ q♦: three-of-a-kind 2♥ 5♥ 7♦ 8♣ 9♠: high-card a♥ 2♦ 3♣ 4♣ 5♦: straight 2♥ 3♥ 2♦ 3♣ 3♦: full-house 2♥ 7♥ 2♦ 3♣ 3♦: two-pair 2♥ 7♥ 7♦ 7♣ 7♠: four-of-a-kind 10♥ j♥ q♥ k♥ a♥: straight-flush 4♥ 4♠ k♠ 5♦ 10♠: one-pair q♣ 10♣ 7♣ 6♣ 4♣: flush
VBScript
option explicit
class playingcard
dim suit
dim pips
'public property get gsuit():gsuit=suit:end property
'public property get gpips():gpips=pips:end property
public sub print
dim s,p
select case suit
case "S":s=chrW(&h2660)
case "D":s=chrW(&h2666)
case "C":s=chrW(&h2663)
case "H":s=chrW(&h2665)
end select
select case pips
case 1:p="A"
case 11:p="J"
case 12:p="Q"
case 13:p="K"
case else: p=""& pips
end select
wscript.stdout.write right(" "&p &