最近用ruby写了一个随机发扑克的类， 可以指定参加的player个数

class Card54
  
  @@given = [] #the cards already given
  @@player_num = nil #players number
  @@player_cards = {} #cards players get
  @@now_turn = 0 #now player's turn
  
  @@cards = (1..54).to_a #total cards
  
  def initialize(player_num=4)
    @@player_num = player_num
    @@cards.length.times { run }
  end
  
  def run
    raise 'no card avaiable' if @@given.length == @@cards.length
    card = rand_card(@@cards - @@given)
    @@given << card
    @@now_turn = 0 if @@now_turn == @@player_num
    give @@now_turn.next, card
    @@now_turn = @@now_turn.next
  end
  
  def player_cards
    p @@player_cards
  end
  
  private
  def rand_card c
    c[rand(c.length)]
  end
  
  def give turn, card
    if @@player_cards[turn].nil?
      @@player_cards[turn] = card.to_s
    else
      @@player_cards[turn] = @@player_cards[turn] + ',' + card.to_s
    end
  end
end
 
#require 'card54'
#play = Card54.new 4
#play.player_cards

这样就支持Card54.new.player_cards了

class Card54
  
  attr_reader :player_cards, :player_num
  
  def initialize(player_num=4)
    @given = [] #the cards already given
    @player_cards = {} #cards players get
    @now_turn = 0 #now player's turn
    @cards = (1..54).to_a #total cards
    
    @player_num = player_num
    @cards.length.times { run }
  end
  
  def run
    raise 'no card avaiable' if @given.length == @cards.length
    card = rand_card(@cards - @given)
    @given << card
    @now_turn = 0 if @now_turn == @player_num
    give @now_turn.next, card
    @now_turn = @now_turn.next
  end
  
  private
  def rand_card c
    c[rand(c.length)]
  end
  
  def give turn, card
    if @player_cards[turn].nil?
      @player_cards[turn] = card.to_s
    else
      @player_cards[turn] = @player_cards[turn] + ',' + card.to_s
    end
  end
end