ランダムに2チームへ分けるスクリプト グッパでホイ編

gistfile1.rb

#!/usr/bin/env ruby

class Member
  attr_reader :name

  def initialize(name)
    @name = name
  end

  def hand
    [ :gu, :pa ].sample
  end
end

if $0 == __FILE__
  srand(Time.local(2012, 9, 6).to_i)

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

  begin
    teams = members.group_by do |member|
      member.hand
    end
  end until teams[:gu].size == members.count / 2

  puts "Gu: #{teams[:gu].map {|member| member.name }.join(' ')}"
  puts "Pa: #{teams[:pa].map {|member| member.name }.join(' ')}"
end