builds now, doesn't pass tests yet
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42
pokercore/findhand.go
Normal file
42
pokercore/findhand.go
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@ -0,0 +1,42 @@
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package pokercore
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import "errors"
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var ErrDuplicateCard = errors.New("cannot score a poker hand out of a set of cards with duplicates")
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// this method makes a n new hands where n is the number of cards in the hand
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// each of the new hands has one card removed from the original hand
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// then it calls the identifyBestFiveCardPokerHand method on each of the new hands
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// and returns the best hand by score. this is recursion.
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func (hand Cards) identifyBestFiveCardPokerHand() (Cards, error) {
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if hand.containsDuplicates() {
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return nil, ErrDuplicateCard
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}
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newHands := make([]Cards, len(hand))
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for i := 0; i < len(hand); i++ {
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newHand := hand[:i]
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newHand = append(newHand, hand[i+1:]...)
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newHands[i] = newHand
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}
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var bestHand Cards
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var bestScore HandScore
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for _, h := range newHands {
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if len(h) == 5 {
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score, _ := h.PokerHandScore()
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if score > bestScore {
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bestScore = score
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bestHand = h
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}
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} else {
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rh, _ := h.identifyBestFiveCardPokerHand()
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score, _ := rh.PokerHandScore()
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if score > bestScore {
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bestScore = score
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bestHand = rh
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}
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}
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}
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return bestHand, nil
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}
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436
pokercore/handhelpers.go
Normal file
436
pokercore/handhelpers.go
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@ -0,0 +1,436 @@
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package pokercore
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func (c Cards) scoreStraightFlush() HandScore {
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if !c.containsStraightFlush() {
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panic("hand must be a straight flush to score it")
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}
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return ScoreStraightFlush + 1000*c.HighestRank().Score()
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}
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func (c Cards) scoreFlush() HandScore {
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if !c.containsFlush() {
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panic("hand must be a flush to score it")
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}
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var score HandScore
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for _, card := range c {
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score += card.Rank.Score()
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}
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return ScoreFlush + score
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}
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func (c Cards) scoreHighCard() HandScore {
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if !c.isUnmadeHand() {
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panic("hand must be a high card to score it")
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}
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var score HandScore
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for _, card := range c {
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score += card.Rank.Score()
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}
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return ScoreHighCard + score
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}
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func (c Cards) pairRank() Rank {
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if !c.containsPair() {
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panic("hand must have a pair to have a pair rank")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank {
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return sorted[0].Rank
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}
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if sorted[1].Rank == sorted[2].Rank {
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return sorted[1].Rank
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}
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if sorted[2].Rank == sorted[3].Rank {
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return sorted[2].Rank
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}
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if sorted[3].Rank == sorted[4].Rank {
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return sorted[3].Rank
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}
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panic("nope")
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}
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func (c Cards) pairFirstKicker() Card {
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if !c.containsPair() {
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panic("hand must have a pair to have a first kicker")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank {
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return sorted[4]
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}
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if sorted[1].Rank == sorted[2].Rank {
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return sorted[4]
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}
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if sorted[2].Rank == sorted[3].Rank {
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return sorted[4]
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}
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if sorted[3].Rank == sorted[4].Rank {
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return sorted[2]
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}
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panic("nope")
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}
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func (c Cards) pairSecondKicker() Card {
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if !c.containsPair() {
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panic("hand must have a pair to have a second kicker")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank {
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// first kicker is [4]
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return sorted[3]
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}
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if sorted[1].Rank == sorted[2].Rank {
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// first kicker is [4]
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return sorted[3]
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}
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if sorted[2].Rank == sorted[3].Rank {
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// first kicker is [4]
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return sorted[1]
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}
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if sorted[3].Rank == sorted[4].Rank {
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// first kicker is [2]
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return sorted[1]
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}
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panic("nope")
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}
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func (c Cards) pairThirdKicker() Card {
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if !c.containsPair() {
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panic("hand must have a pair to have a third kicker")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank {
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// first kicker is [4]
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// second kicker is [3]
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return sorted[2]
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}
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if sorted[1].Rank == sorted[2].Rank {
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// first kicker is [4]
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// second kicker is [3]
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return sorted[0]
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}
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if sorted[2].Rank == sorted[3].Rank {
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// first kicker is [4]
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// second kicker is [1]
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return sorted[0]
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}
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if sorted[3].Rank == sorted[4].Rank {
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// first kicker is [2]
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// second kicker is [1]
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return sorted[0]
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}
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panic("nope")
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}
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func (c Cards) twoPairBiggestPair() Rank {
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if !c.containsTwoPair() {
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panic("hand must have two pair to have a biggest pair")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank {
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return sorted[2].Rank
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}
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if sorted[0].Rank == sorted[1].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[0].Rank
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[1].Rank
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}
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panic("nope")
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}
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func (c Cards) twoPairSmallestPair() Rank {
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if !c.containsTwoPair() {
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panic("hand must have two pair to have a smallest pair")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank {
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return sorted[2].Rank
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}
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if sorted[0].Rank == sorted[1].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[3].Rank
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[3].Rank
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}
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panic("nope")
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}
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func (c Cards) twoPairKicker() Card {
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if !c.containsTwoPair() {
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panic("hand must have two pair to have a twoPairKicker")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank {
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return sorted[4]
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}
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if sorted[0].Rank == sorted[1].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[2]
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[0]
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}
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panic("nope")
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}
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func (c Cards) threeOfAKindTripsRank() Rank {
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if !c.containsThreeOfAKind() {
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panic("hand must have three of a kind to have a trips rank")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank {
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return sorted[0].Rank
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
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return sorted[1].Rank
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}
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if sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[2].Rank
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}
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panic("nope")
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}
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func (c Cards) threeOfAKindKickers() Cards {
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if !c.containsThreeOfAKind() {
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panic("hand must have three of a kind to have kickers")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank {
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return Cards{sorted[3], sorted[4]}
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
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return Cards{sorted[0], sorted[4]}
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}
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if sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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return Cards{sorted[0], sorted[1]}
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}
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panic("nope")
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}
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func (c Cards) threeOfAKindFirstKicker() Card {
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x := c.threeOfAKindKickers()
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return x[0]
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}
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func (c Cards) threeOfAKindSecondKicker() Card {
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x := c.threeOfAKindKickers()
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return x[1]
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}
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func (c Cards) fourOfAKindRank() Rank {
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if !c.containsFourOfAKind() {
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panic("hand must have four of a kind to have a four of a kind rank")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
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return sorted[0].Rank
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[1].Rank
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}
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panic("nope")
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}
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func (c Cards) fourOfAKindKicker() Card {
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if !c.containsFourOfAKind() {
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panic("hand must have four of a kind to have a four of a kind kicker")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
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return sorted[4]
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[0]
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}
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panic("nope")
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}
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func (c Cards) fullHouseTripsRank() Rank {
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if !c.containsFullHouse() {
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panic("hand must have a full house to have a trips rank")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[0].Rank
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}
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if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[4].Rank
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}
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panic("nope")
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}
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func (c Cards) fullHousePairRank() Rank {
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if !c.containsFullHouse() {
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panic("hand must have a full house to have a pair rank")
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}
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sorted := c.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[4].Rank
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}
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if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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return sorted[0].Rank
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}
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panic("nope")
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}
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func (hand Cards) containsDuplicates() bool {
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seen := make(map[Card]bool)
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for _, card := range hand {
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if _, ok := seen[card]; ok {
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return true
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}
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seen[card] = true
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}
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return false
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}
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func (hand Cards) IsFiveCardPokerHand() bool {
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return len(hand) == 5 && !hand.containsDuplicates()
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}
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func (hand Cards) containsFlush() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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suit := hand[0].Suit
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for i := 1; i < len(hand); i++ {
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if hand[i].Suit != suit {
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return false
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}
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}
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return true
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}
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func (hand Cards) containsStraight() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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sorted := hand.SortByRank()
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if sorted[4].Rank == ACE && sorted[3].Rank == FIVE {
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// special case for A-5 straight
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if sorted[0].Rank == DEUCE && sorted[1].Rank == THREE && sorted[2].Rank == FOUR {
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return true
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} else {
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return false
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}
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}
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return sorted[0].Rank.Int()+1 == sorted[1].Rank.Int() &&
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sorted[1].Rank.Int()+1 == sorted[2].Rank.Int() &&
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sorted[2].Rank.Int()+1 == sorted[3].Rank.Int() &&
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sorted[3].Rank.Int()+1 == sorted[4].Rank.Int()
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}
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func (hand Cards) containsStraightFlush() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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if hand.containsStraight() && hand.containsFlush() {
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return true
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}
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return false
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}
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func (hand Cards) containsRoyalFlush() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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if hand.containsStraightFlush() && hand.HighestRank() == ACE {
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return true
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}
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return false
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}
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func (hand Cards) containsFourOfAKind() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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sorted := hand.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
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// the quads precede the kicker
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return true
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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// the kicker is the first card
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return true
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}
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return false
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}
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func (hand Cards) containsFullHouse() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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sorted := hand.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
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// the trips precede the pair
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return true
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}
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if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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// the pair is first
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return true
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}
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return false
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}
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func (hand Cards) containsPair() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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sorted := hand.SortByRank()
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if sorted[0].Rank == sorted[1].Rank {
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return true
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}
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if sorted[1].Rank == sorted[2].Rank {
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return true
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}
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if sorted[2].Rank == sorted[3].Rank {
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return true
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}
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if sorted[3].Rank == sorted[4].Rank {
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return true
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}
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return false
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}
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func (hand Cards) containsThreeOfAKind() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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sorted := hand.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank {
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return true
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}
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if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
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return true
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}
|
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if sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
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return true
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}
|
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return false
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}
|
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|
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func (hand Cards) containsTwoPair() bool {
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
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}
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sorted := hand.SortByRank()
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if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank {
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return true
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}
|
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if sorted[0].Rank == sorted[1].Rank && sorted[3].Rank == sorted[4].Rank {
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return true
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}
|
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if sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
|
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return true
|
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}
|
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return false
|
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}
|
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|
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func (hand Cards) isUnmadeHand() bool {
|
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if !hand.IsFiveCardPokerHand() {
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panic("hand must have 5 cards to be scored")
|
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}
|
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return !hand.containsPair() && !hand.containsTwoPair() && !hand.containsThreeOfAKind() && !hand.containsStraight() && !hand.containsFlush() && !hand.containsFullHouse() && !hand.containsFourOfAKind() && !hand.containsStraightFlush() && !hand.containsRoyalFlush()
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}
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@ -56,21 +56,19 @@ type Card struct {
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type Cards []Card
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|
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func (r Rank) Int(x AcesHighOrLow) int {
|
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return int(rankToScore(r, x))
|
||||
func (r Rank) Int() int {
|
||||
return int(r.Score())
|
||||
}
|
||||
|
||||
func (r Rank) HandScore(x AcesHighOrLow) HandScore {
|
||||
return HandScore(r.Int(x))
|
||||
func (r Rank) HandScore() HandScore {
|
||||
return HandScore(r.Int())
|
||||
}
|
||||
|
||||
func (c Cards) SortByRank(x AcesHighOrLow) Cards {
|
||||
|
||||
func (c Cards) SortByRank() Cards {
|
||||
newCards := make(Cards, len(c))
|
||||
copy(newCards, c)
|
||||
|
||||
sort.Slice(newCards, func(i, j int) bool {
|
||||
return rankToScore(newCards[i].Rank, x) > rankToScore(newCards[j].Rank, x)
|
||||
return newCards[i].Rank.Score() > newCards[j].Rank.Score()
|
||||
})
|
||||
return newCards
|
||||
}
|
||||
@ -125,8 +123,8 @@ func (c *Card) String() string {
|
||||
return fmt.Sprintf("%s%s", string(c.Rank), string(c.Suit))
|
||||
}
|
||||
|
||||
func (c Cards) HighestRank(x AcesHighOrLow) Rank {
|
||||
c = c.SortByRank(x)
|
||||
func (c Cards) HighestRank() Rank {
|
||||
c = c.SortByRank()
|
||||
return c[0].Rank
|
||||
}
|
||||
|
||||
|
||||
163
pokercore/pokerhand.go
Normal file
163
pokercore/pokerhand.go
Normal file
@ -0,0 +1,163 @@
|
||||
package pokercore
|
||||
|
||||
import "fmt"
|
||||
|
||||
type PokerHandType int
|
||||
|
||||
const (
|
||||
HighCard PokerHandType = iota
|
||||
Pair
|
||||
TwoPair
|
||||
ThreeOfAKind
|
||||
Straight
|
||||
Flush
|
||||
FullHouse
|
||||
FourOfAKind
|
||||
StraightFlush
|
||||
RoyalFlush
|
||||
)
|
||||
|
||||
type PokerHand struct {
|
||||
Hand Cards
|
||||
Type PokerHandType
|
||||
Score HandScore
|
||||
}
|
||||
|
||||
func (c Cards) PokerHand() (*PokerHand, error) {
|
||||
if len(c) != 5 {
|
||||
return nil, fmt.Errorf("hand must have 5 cards to be scored as a poker hand")
|
||||
}
|
||||
if c.containsDuplicates() {
|
||||
return nil, fmt.Errorf("hand must have no duplicates to be scored as a poker hand")
|
||||
}
|
||||
|
||||
ph := new(PokerHand)
|
||||
ph.Hand = c
|
||||
if c.containsRoyalFlush() {
|
||||
ph.Type = RoyalFlush
|
||||
ph.Score = ScoreRoyalFlush
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsStraightFlush() {
|
||||
ph.Type = StraightFlush
|
||||
ph.Score = ph.Hand.scoreStraightFlush()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsFourOfAKind() {
|
||||
ph.Type = FourOfAKind
|
||||
ph.Score = ScoreFourOfAKind + 1000*c.fourOfAKindRank().Score() + c.fourOfAKindKicker().Score()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsFullHouse() {
|
||||
ph.Type = FullHouse
|
||||
ph.Score = ScoreFullHouse + 1000*c.fullHouseTripsRank().Score() + c.fullHousePairRank().Score()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsFlush() {
|
||||
ph.Type = Flush
|
||||
ph.Score = c.scoreFlush()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsStraight() {
|
||||
ph.Type = Straight
|
||||
ph.Score = ScoreStraight + 1000*c.HighestRank().Score()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsThreeOfAKind() {
|
||||
ph.Type = ThreeOfAKind
|
||||
ph.Score = ScoreThreeOfAKind
|
||||
ph.Score += 1000 * c.threeOfAKindTripsRank().Score()
|
||||
ph.Score += 100 * c.threeOfAKindFirstKicker().Score()
|
||||
ph.Score += 10 * c.threeOfAKindSecondKicker().Score()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsTwoPair() {
|
||||
ph.Type = TwoPair
|
||||
ph.Score = ScoreTwoPair
|
||||
ph.Score += 1000 * c.twoPairBiggestPair().Score()
|
||||
ph.Score += 100 * c.twoPairSmallestPair().Score()
|
||||
ph.Score += 10 * c.twoPairKicker().Score()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
if c.containsPair() {
|
||||
ph.Type = Pair
|
||||
ph.Score = ScorePair
|
||||
ph.Score += 1000 * c.pairRank().Score()
|
||||
ph.Score += 100 * c.pairFirstKicker().Score()
|
||||
ph.Score += 10 * c.pairSecondKicker().Score()
|
||||
ph.Score += c.pairThirdKicker().Score()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
ph.Type = HighCard
|
||||
ph.Score = c.scoreHighCard()
|
||||
return ph, nil
|
||||
}
|
||||
|
||||
func (c PokerHand) HighestRank() Rank {
|
||||
return c.Hand.HighestRank()
|
||||
}
|
||||
|
||||
func (c PokerHand) String() string {
|
||||
sortedHand := c.Hand.SortByRank()
|
||||
if c.Type == RoyalFlush {
|
||||
return fmt.Sprintf("a royal flush in %s", c.Hand[0].Suit)
|
||||
}
|
||||
if c.Hand.containsStraightFlush() {
|
||||
return fmt.Sprintf("%s high straight flush in %s", c.HighestRank().WithArticle(), sortedHand[0].Suit)
|
||||
}
|
||||
if c.Hand.containsFourOfAKind() {
|
||||
return fmt.Sprintf("four %s with %s", c.Hand.fourOfAKindRank().Pluralize(), c.Hand.fourOfAKindKicker().Rank.WithArticle())
|
||||
}
|
||||
if c.Hand.containsFullHouse() {
|
||||
return fmt.Sprintf("a full house, %s full of %s", c.Hand.fullHouseTripsRank().Pluralize(), c.Hand.fullHousePairRank().Pluralize())
|
||||
}
|
||||
if c.Hand.containsFlush() {
|
||||
return fmt.Sprintf("%s high flush in %s", c.HighestRank().WithArticle(), sortedHand[0].Suit)
|
||||
}
|
||||
if c.Hand.containsStraight() {
|
||||
return fmt.Sprintf("%s high straight", c.HighestRank().WithArticle())
|
||||
}
|
||||
if c.Hand.containsThreeOfAKind() {
|
||||
return fmt.Sprintf(
|
||||
"three %s with %s and %s",
|
||||
c.Hand.threeOfAKindTripsRank().Pluralize(),
|
||||
c.Hand.threeOfAKindFirstKicker().Rank.WithArticle(),
|
||||
c.Hand.threeOfAKindSecondKicker().Rank.WithArticle(),
|
||||
)
|
||||
}
|
||||
if c.Hand.containsTwoPair() {
|
||||
return fmt.Sprintf(
|
||||
"two pair, %s and %s with %s",
|
||||
c.Hand.twoPairBiggestPair().Pluralize(),
|
||||
c.Hand.twoPairSmallestPair().Pluralize(),
|
||||
c.Hand.twoPairKicker().Rank.WithArticle(),
|
||||
)
|
||||
}
|
||||
if c.Hand.containsPair() {
|
||||
return fmt.Sprintf(
|
||||
"a pair of %s with %s, %s, and %s",
|
||||
c.Hand.pairRank().Pluralize(),
|
||||
c.Hand.pairFirstKicker().Rank.WithArticle(),
|
||||
c.Hand.pairSecondKicker().Rank.WithArticle(),
|
||||
c.Hand.pairThirdKicker().Rank.WithArticle(),
|
||||
)
|
||||
}
|
||||
return fmt.Sprintf(
|
||||
// "ace high with an eight, a seven, a six, and a deuce"
|
||||
"%s high with %s, %s, %s, and %s",
|
||||
sortedHand[4].Rank,
|
||||
sortedHand[3].Rank.WithArticle(),
|
||||
sortedHand[2].Rank.WithArticle(),
|
||||
sortedHand[1].Rank.WithArticle(),
|
||||
sortedHand[0].Rank.WithArticle(),
|
||||
)
|
||||
}
|
||||
@ -5,7 +5,7 @@ import "fmt"
|
||||
type HandScore int
|
||||
|
||||
const (
|
||||
ScoreNoPair = HandScore(iota * 100_000_000_000)
|
||||
ScoreHighCard = HandScore(iota * 100_000_000_000)
|
||||
ScorePair
|
||||
ScoreTwoPair
|
||||
ScoreThreeOfAKind
|
||||
@ -14,23 +14,108 @@ const (
|
||||
ScoreFullHouse
|
||||
ScoreFourOfAKind
|
||||
ScoreStraightFlush
|
||||
ScoreRoyalFlush
|
||||
)
|
||||
|
||||
type AcesHighOrLow int
|
||||
func (c Card) Score() HandScore {
|
||||
return HandScore(c.Rank.Score())
|
||||
}
|
||||
|
||||
const (
|
||||
AcesHigh AcesHighOrLow = iota
|
||||
AcesLow
|
||||
)
|
||||
|
||||
func rankToScore(rank Rank, AcesHighOrLow AcesHighOrLow) HandScore {
|
||||
switch rank {
|
||||
case ACE:
|
||||
if AcesHighOrLow == AcesHigh {
|
||||
return 14 // Aces are high, so we give them the highest value
|
||||
} else {
|
||||
return 1
|
||||
func (c Cards) PokerHandScore() (HandScore, error) {
|
||||
if len(c) != 5 {
|
||||
return 0, fmt.Errorf("hand must have 5 cards to be scored as a poker hand")
|
||||
}
|
||||
ph, err := c.PokerHand()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
|
||||
fmt.Println(ph)
|
||||
return ph.Score, nil
|
||||
}
|
||||
|
||||
/*
|
||||
func scoreToName(x HandScore) string {
|
||||
switch x {
|
||||
case x >= ScoreRoyalFlush:
|
||||
return "Royal Flush"
|
||||
case x >= ScoreStraightFlush:
|
||||
return "Straight Flush"
|
||||
case x >= ScoreFourOfAKind:
|
||||
return "Four of a Kind"
|
||||
case x >= ScoreFullHouse:
|
||||
return "Full House"
|
||||
case x >= ScoreFlush:
|
||||
return "Flush"
|
||||
case x >= ScoreStraight:
|
||||
return "Straight"
|
||||
case x >= ScoreThreeOfAKind:
|
||||
return "Three of a Kind"
|
||||
case x >= ScoreTwoPair:
|
||||
return "Two Pair"
|
||||
case x >= ScorePair:
|
||||
return "Pair"
|
||||
case x >= ScoreHighCard:
|
||||
return "High Card"
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
func (r Rank) Article() string {
|
||||
switch r {
|
||||
case ACE:
|
||||
return "an"
|
||||
case EIGHT:
|
||||
return "an"
|
||||
default:
|
||||
return "a"
|
||||
}
|
||||
}
|
||||
|
||||
func (r Rank) WithArticle() string {
|
||||
return fmt.Sprintf("%s %s", r.Article(), r)
|
||||
}
|
||||
|
||||
func (r Rank) Pluralize() string {
|
||||
switch r {
|
||||
case ACE:
|
||||
return "Aces"
|
||||
case DEUCE:
|
||||
return "Deuces"
|
||||
case THREE:
|
||||
return "Threes"
|
||||
case FOUR:
|
||||
return "Fours"
|
||||
case FIVE:
|
||||
return "Fives"
|
||||
case SIX:
|
||||
return "Sixes"
|
||||
case SEVEN:
|
||||
return "Sevens"
|
||||
case EIGHT:
|
||||
return "Eights"
|
||||
case NINE:
|
||||
return "Nines"
|
||||
case TEN:
|
||||
return "Tens"
|
||||
case JACK:
|
||||
return "Jacks"
|
||||
case QUEEN:
|
||||
return "Queens"
|
||||
case KING:
|
||||
return "Kings"
|
||||
default:
|
||||
panic("nope")
|
||||
}
|
||||
}
|
||||
|
||||
func (x HandScore) String() string {
|
||||
return fmt.Sprintf("<HandScore %d>", x)
|
||||
//return scoreToName(x)
|
||||
}
|
||||
|
||||
func (r Rank) Score() HandScore {
|
||||
switch r {
|
||||
case DEUCE:
|
||||
return 2
|
||||
case THREE:
|
||||
@ -55,209 +140,8 @@ func rankToScore(rank Rank, AcesHighOrLow AcesHighOrLow) HandScore {
|
||||
return 12
|
||||
case KING:
|
||||
return 13
|
||||
default:
|
||||
panic("nope")
|
||||
case ACE:
|
||||
return 14
|
||||
}
|
||||
}
|
||||
|
||||
func (c Cards) ScoreHand() (HandScore, error) {
|
||||
if !c.IsFiveCardPokerHand() {
|
||||
return 0, fmt.Errorf("hand must have 5 cards with no duplicates to be scored")
|
||||
}
|
||||
if c.containsRoyalFlush() {
|
||||
return ScoreStraightFlush + 1000*ACE.HandScore(AcesHigh), nil
|
||||
}
|
||||
if c.containsStraightFlush() {
|
||||
return ScoreStraightFlush + 1000*c.HighestRank(AcesHigh).HandScore(AcesHigh), nil
|
||||
}
|
||||
|
||||
panic("not implemented")
|
||||
// FIXME finish this
|
||||
return 0, nil
|
||||
}
|
||||
|
||||
func (hand Cards) containsDuplicates() bool {
|
||||
seen := make(map[Card]bool)
|
||||
for _, card := range hand {
|
||||
if _, ok := seen[card]; ok {
|
||||
return true
|
||||
}
|
||||
seen[card] = true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) IsFiveCardPokerHand() bool {
|
||||
return len(hand) == 5 && !hand.containsDuplicates()
|
||||
}
|
||||
|
||||
func (hand Cards) containsFlush() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
suit := hand[0].Suit
|
||||
for i := 1; i < len(hand); i++ {
|
||||
if hand[i].Suit != suit {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
func (hand Cards) containsStraight() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
sorted := hand.SortByRank(AcesHigh)
|
||||
|
||||
if sorted[0].Rank == ACE && sorted[1].Rank == FIVE {
|
||||
// special case for A-5 straight
|
||||
if sorted[1].Rank == FIVE && sorted[2].Rank == FOUR && sorted[3].Rank == THREE && sorted[4].Rank == DEUCE {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return sorted[0].Rank.Int(AcesHigh) == sorted[1].Rank.Int(AcesHigh)+1 && sorted[1].Rank.Int(AcesHigh) == sorted[2].Rank.Int(AcesHigh)+1 && sorted[2].Rank.Int(AcesHigh) == sorted[3].Rank.Int(AcesHigh)+1 && sorted[3].Rank.Int(AcesHigh) == sorted[4].Rank.Int(AcesHigh)+1
|
||||
}
|
||||
|
||||
func (hand Cards) containsStraightFlush() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
if hand.containsStraight() && hand.containsFlush() {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) containsRoyalFlush() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
sorted := hand.SortByRank(AcesHigh)
|
||||
if hand.containsStraightFlush() && sorted[0].Rank == ACE {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) containsFourOfAKind() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
sorted := hand.SortByRank(AcesHigh)
|
||||
if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) containsFullHouse() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
sorted := hand.SortByRank(AcesHigh)
|
||||
if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) containsPair() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
sorted := hand.SortByRank(AcesHigh)
|
||||
if sorted[0].Rank == sorted[1].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[1].Rank == sorted[2].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[2].Rank == sorted[3].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[3].Rank == sorted[4].Rank {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) containsThreeOfAKind() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
sorted := hand.SortByRank(AcesHigh)
|
||||
if sorted[0].Rank == sorted[1].Rank && sorted[1].Rank == sorted[2].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[1].Rank == sorted[2].Rank && sorted[2].Rank == sorted[3].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[2].Rank == sorted[3].Rank && sorted[3].Rank == sorted[4].Rank {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) containsTwoPair() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
sorted := hand.SortByRank(AcesHigh)
|
||||
if sorted[0].Rank == sorted[1].Rank && sorted[2].Rank == sorted[3].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[0].Rank == sorted[1].Rank && sorted[3].Rank == sorted[4].Rank {
|
||||
return true
|
||||
}
|
||||
if sorted[1].Rank == sorted[2].Rank && sorted[3].Rank == sorted[4].Rank {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func (hand Cards) isUnmadeHand() bool {
|
||||
if !hand.IsFiveCardPokerHand() {
|
||||
panic("hand must have 5 cards to be scored")
|
||||
}
|
||||
return !hand.containsPair() && !hand.containsTwoPair() && !hand.containsThreeOfAKind() && !hand.containsStraight() && !hand.containsFlush() && !hand.containsFullHouse() && !hand.containsFourOfAKind() && !hand.containsStraightFlush() && !hand.containsRoyalFlush()
|
||||
}
|
||||
|
||||
// this method makes a n new hands where n is the number of cards in the hand
|
||||
// each of the new hands has one card removed from the original hand
|
||||
// then it calls the identifyBestFiveCardPokerHand method on each of the new hands
|
||||
// and returns the best hand by score. this is recursion.
|
||||
func (hand Cards) identifyBestFiveCardPokerHand() (Cards, error) {
|
||||
newHands := make([]Cards, len(hand))
|
||||
for i := 0; i < len(hand); i++ {
|
||||
newHand := hand[:i]
|
||||
newHand = append(newHand, hand[i+1:]...)
|
||||
newHands[i] = newHand
|
||||
}
|
||||
var bestHand Cards
|
||||
var bestScore HandScore
|
||||
|
||||
for _, h := range newHands {
|
||||
if h.IsFiveCardPokerHand() {
|
||||
score, _ := h.ScoreHand()
|
||||
if score > bestScore {
|
||||
bestScore = score
|
||||
bestHand = h
|
||||
}
|
||||
} else {
|
||||
rh, _ := h.identifyBestFiveCardPokerHand()
|
||||
score, _ := rh.ScoreHand()
|
||||
if score > bestScore {
|
||||
bestScore = score
|
||||
bestHand = rh
|
||||
}
|
||||
}
|
||||
}
|
||||
return bestHand, nil
|
||||
return 0
|
||||
}
|
||||
|
||||
@ -75,13 +75,13 @@ func TestFlush(t *testing.T) {
|
||||
|
||||
x := ScoreFlush
|
||||
var multiplier HandScore = 100
|
||||
x += multiplier * DEUCE.HandScore(AcesHigh)
|
||||
x += multiplier * DEUCE.Score()
|
||||
multiplier *= 100
|
||||
x += multiplier * THREE.HandScore(AcesHigh)
|
||||
x += multiplier * THREE.Score()
|
||||
multiplier *= 100
|
||||
x += multiplier * FOUR.HandScore(AcesHigh)
|
||||
x += multiplier * FOUR.Score()
|
||||
multiplier *= 100
|
||||
x += multiplier * SIX.HandScore(AcesHigh)
|
||||
x += multiplier * SIX.Score()
|
||||
fmt.Printf("a-2-3-4-6 flush score should be: %d\n", x)
|
||||
}
|
||||
|
||||
@ -103,7 +103,7 @@ func TestStraightFlush(t *testing.T) {
|
||||
assert.False(t, hand.containsTwoPair(), "Expected hand to not be two pair")
|
||||
assert.False(t, hand.containsPair(), "Expected hand to not be a pair")
|
||||
|
||||
assert.True(t, hand.HighestRank(AcesHigh) == SIX, "Expected highest rank to be a six")
|
||||
assert.True(t, hand.HighestRank() == SIX, "Expected highest rank to be a six")
|
||||
|
||||
nd := NewDeckFromCards(hand)
|
||||
nd.ShuffleDeterministically(123456789)
|
||||
@ -111,8 +111,8 @@ func TestStraightFlush(t *testing.T) {
|
||||
fmt.Printf("new deck has %d cards\n", nd.Count())
|
||||
shuffledHand := nd.Deal(5)
|
||||
assert.True(t, shuffledHand.containsStraightFlush(), "Expected hand to still be a straight flush after shuffle")
|
||||
assert.True(t, shuffledHand.HighestRank(AcesHigh) == SIX, "Expected highest rank to still be a six after shuffle")
|
||||
assert.True(t, shuffledHand.HighestRank(AcesLow) == SIX, "Expected highest rank to be a six after shuffle even with aces low")
|
||||
assert.True(t, shuffledHand.HighestRank() == SIX, "Expected highest rank to still be a six after shuffle")
|
||||
assert.True(t, shuffledHand.HighestRank() == SIX, "Expected highest rank to be a six after shuffle even with aces low")
|
||||
}
|
||||
|
||||
func TestRoyalFlush(t *testing.T) {
|
||||
@ -134,8 +134,8 @@ func TestRoyalFlush(t *testing.T) {
|
||||
assert.False(t, hand.containsTwoPair(), "Expected hand to not be two pair")
|
||||
assert.False(t, hand.containsPair(), "Expected hand to not be a pair")
|
||||
|
||||
assert.True(t, hand.HighestRank(AcesHigh) == ACE, "Expected highest rank to be an ace")
|
||||
assert.False(t, hand.HighestRank(AcesHigh) == TEN, "Expected highest rank to not be an ace")
|
||||
assert.True(t, hand.HighestRank() == ACE, "Expected highest rank to be an ace")
|
||||
assert.False(t, hand.HighestRank() == TEN, "Expected highest rank to not be an ace")
|
||||
}
|
||||
|
||||
func TestUnmadeHand(t *testing.T) {
|
||||
@ -155,7 +155,7 @@ func TestUnmadeHand(t *testing.T) {
|
||||
assert.False(t, hand.containsThreeOfAKind(), "Expected hand to not be three of a kind")
|
||||
assert.False(t, hand.containsTwoPair(), "Expected hand to not be two pair")
|
||||
assert.False(t, hand.containsPair(), "Expected hand to not be a pair")
|
||||
assert.True(t, hand.HighestRank(AcesHigh) == KING, "Expected highest rank to be a king")
|
||||
assert.True(t, hand.HighestRank() == KING, "Expected highest rank to be a king")
|
||||
assert.True(t, hand.isUnmadeHand(), "Expected hand to be unmade")
|
||||
}
|
||||
|
||||
@ -176,6 +176,24 @@ func TestTwoPair(t *testing.T) {
|
||||
assert.False(t, hand.containsThreeOfAKind(), "Expected hand to not be three of a kind")
|
||||
assert.True(t, hand.containsTwoPair(), "Expected hand to be two pair")
|
||||
assert.True(t, hand.containsPair(), "Expected hand to also be a pair")
|
||||
assert.True(t, hand.HighestRank(AcesHigh) == KING, "Expected highest rank to be a king")
|
||||
assert.True(t, hand.HighestRank() == KING, "Expected highest rank to be a king")
|
||||
assert.False(t, hand.isUnmadeHand(), "Expected hand to not be unmade")
|
||||
}
|
||||
|
||||
func TestHandScore(t *testing.T) {
|
||||
hand := Cards{
|
||||
KingOfSpades(),
|
||||
JackOfDiamonds(),
|
||||
JackOfSpades(),
|
||||
KingOfDiamonds(),
|
||||
TenOfSpades(),
|
||||
}
|
||||
|
||||
ph, error := hand.PokerHand()
|
||||
assert.Nil(t, error, "Expected no error")
|
||||
assert.True(t, ph.Score > 0, "Expected score to be nonzero 0")
|
||||
assert.True(t, ph.Score < 100000000000000000, "Expected score to be less than 100000000000000000")
|
||||
|
||||
fmt.Printf("PokerHand: %v+\n", ph)
|
||||
fmt.Printf("PH score: %d\n", ph.Score)
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user