Class: Poker::Hand

Inherits:
Object
  • Object
show all
Includes:
Comparable, Enumerable
Defined in:
lib/poker/hand.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*str_or_ary) ⇒ Hand

Returns a new instance of Hand.



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# File 'lib/poker/hand.rb', line 17

def initialize(*str_or_ary)
  if str_or_ary.size == 1
    @cards = str_or_ary[0].split(/ /).map { |s| Card.new(s) }
  else
    if str_or_ary[0].kind_of?(Card)
      @cards = str_or_ary
    else
      @cards = str_or_ary.map { |s| Card.new(s) }
    end
  end
end

Class Method Details

.best(cards) ⇒ Object 



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# File 'lib/poker/hand.rb', line 8

def self.best(cards)
  best = nil
  cards.combination(5).each do |c|
    hand = Hand.new(*c)
    best = hand if !best || hand > best
  end
  best
end

Instance Method Details

#<=>(hand) ⇒ Object 



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# File 'lib/poker/hand.rb', line 47

def <=>(hand)
  - (value <=> hand.value)
end

#[](index) ⇒ Object 



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# File 'lib/poker/hand.rb', line 51

def [](index)
  @cards[index]
end

#each(&block) ⇒ Object 



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# File 'lib/poker/hand.rb', line 55

def each(&block)
  @cards.each(&block)
end

#rank ⇒ Object 



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# File 'lib/poker/hand.rb', line 33

def rank
  v = value
  return "High Card"       if v > 6185
  return "Pair"            if v > 3325
  return "Two Pair"        if v > 2467
  return "Three of a Kind" if v > 1609
  return "Straight"        if v > 1599
  return "Flush"           if v > 322
  return "Full House"      if v > 166
  return "Four of a Kind"  if v > 10
  return "Straight Flush"  if v > 1
  return "Royal Flush"     if v == 1
end

#size ⇒ Object 



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# File 'lib/poker/hand.rb', line 59

def size
  @cards.size
end

#to_s ⇒ Object 



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# File 'lib/poker/hand.rb', line 63

def to_s
  r = rank
  if r == "Pair" || r == "Two Pair" || r == "Three of a Kind" ||
     r == "Full House" || r == "Four of a Kind"
    h = @cards.inject({}) { |h, c|
      r = c.rank_value + 1
      h[r] = h[r] ? h[r] + 1 : 0
      h
    }
    return @cards.sort_by { |c|
      if h[c.rank_value + 1] > 0
        - ((h[c.rank_value + 1] * 10_000) + (c.rank_value + 1) * 100) +
          c.suit_value
      else
        - c.rank_value + c.suit_value
      end
    }.join(" ")
  elsif r == "Straight Flush" || r == "Straight"
    return @cards.sort_by { |c|
      if c.rank_value == 12
        10_000
      else
        - (c.rank_value + 1) * 100 - c.suit_value
      end
    }.join(" ")
  end
  @cards.sort_by { |c| - (c.rank_value + 1) * 100 - c.suit_value }.
    join(" ")
end

#to_str ⇒ Object 



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# File 'lib/poker/hand.rb', line 93

def to_str
  to_s
end

#value ⇒ Object 



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# File 'lib/poker/hand.rb', line 29

def value
  HandEval.eval(*(@cards.map { |c| c.value }))
end