ランダムに2チームへ分けるスクリプト ジャンケン編

gistfile1.rb

#!/usr/bin/env ruby

class Member

  attr_reader :name
  def initialize(name)
    @name = name
  end
  def win?(opponent)
    result_table = { gu: { gu: :even, choki: :win, pa: :lose },
                     choki: { gu: :lose, choki: :even, pa: :win },
                     pa: { gu: :win, choki: :lose, pa: :even } }
    begin
      result = result_table[self.hand][opponent.hand]
    end while result == :even
    result == :win
  end
  def hand
    [:gu, :choki, :pa].at(rand(3))
  end
end

if $0 == __FILE__
  srand(Time.local(2012, 8, 9).to_i)

  members = ARGF.map do |name|
    Member.new(name.chomp)
  end

  def members.choose!
    delete_at(rand(count))
  end

  a_team = []
  b_team = []
  teams = [a_team, b_team]
  while members.count != 0
    if members.count == 1
      teams[rand(2)] << members.choose!
      break
    end

    red = members.choose!
    blue = members.choose!

    if red.win?(blue)
      a_team << red
      b_team << blue
    else
      a_team << blue
      b_team << red
    end
  end

  puts "A: #{a_team.map {|member| member.name }.join(' ')}"
  puts "B: #{b_team.map {|member| member.name }.join(' ')}"
end