hw1_2b.rb

#!/usr/bin/env ruby

# Rock Paper Scissors

class WrongNumberOfPlayersError < StandardError ; end
class NoSuchStrategyError  < StandardError ; end

def rps_tournament_winner ( tourney )
    # if tourney[0][0] is a string, that means that's a match
    # if not
    if tourney[0][0].is_a?( String )
        player1 = tourney[0]
        player2 = tourney[1]
        puts "Player 1:  " + player1.join( ',' )
        puts "Player 2:  " + player2.join( ',' )
        round = [ player1 , player2 ]
        winner = rps_game_winner( round )
        puts "    Winner: " + winner.join(':')
        return winner
    else
        puts "######### ######### Bracket vvvvvv"
        player1 = rps_tournament_winner( tourney[0] )
        player2 = rps_tournament_winner( tourney[1] )
        puts "Player 1:  " + player1.join( ',' )
        puts "Player 2:  " + player2.join( ',' )
        round = [ player1 , player2 ]
        winner = rps_game_winner( round )
        puts "    Winner: " + winner.join(':')
        puts "######### ######### Bracket ^^^^^"
        return winner
    end
end

def rps_game_winner ( game )
    raise WrongNumberOfPlayersError unless game.length == 2
    player1 = game[0]
    player2 = game[1]
    puts "11111111:  " + player1.join( ',' )
    puts "22222222:  " + player2.join( ',' )
    raise NoSuchStrategyError unless player1[1] == "P" || player1[1] == "S" || player1[1] == "R"
    raise NoSuchStrategyError unless player2[1] == "P" || player2[1] == "S" || player2[1] == "R"

    # player1 wins tie
    if player1[1] == "R"
        if player2[1] == "R"
            return player1
        elsif player2[1] == "P"
            return player2
        elsif player2[1] == "S"
            return player1
        end
    elsif player1[1] == "P"
        if player2[1] == "R"
            return player1
        elsif player2[1] == "P"
            return player1
        elsif player2[1] == "S"
            return player2
        end
    elsif player1[1] == "S"
        if player2[2] == "R"
            return player1
        elsif player2[1] == "P"
            return player1
        elsif player2[1] == "S"
            return player1
        end
    end

    return 'impossible','impossible'
end

tourney = [
  [
    [ [ "Armando" , "P" ] , [ "Dave" , "S" ] ],
    [ [ "Richard" , "R" ] , [ "Michael" , "S" ] ]
  ],
  [
    [ [ "Allen" , "S" ] , [ "Omer" , "P" ] ],
    [ [ "David E." , "R" ] , [ "Richard X." , "P" ] ]
  ]
]
puts rps_tournament_winner( tourney )