Discussion on: Daily Challenge #174 - Soccer League Table

[Valts Liepiņš]

Ruby, concise as usual:

class LeagueTable
    def initialize
        @results = Hash.new(Hash.new(0))
    end
    def push str
        str.match /^(.+) (\d+) - (\d+) (.+)$/
        h_name, a_name = $1, $4
        h_goal, a_goal = $2.to_i, $3.to_i
        result = h_goal <=> a_goal

        @results[h_name] = Hash.new(0) unless @results.has_key? h_name
        @results[a_name] = Hash.new(0) unless @results.has_key? a_name

        @results[h_name].tap do |stats|
            stats[:goals] += h_goal
            stats[:conceded] += a_goal
            stats[:wins] += (result + 1) / 2
            stats[:losses] += (-result + 1) / 2
            stats[:draws] += -(result.abs) + 1
        end
        @results[a_name].tap do |stats|
            stats[:goals] += a_goal
            stats[:conceded] += h_goal
            stats[:wins] += (-result + 1) / 2
            stats[:losses] += (result + 1) / 2
            stats[:draws] += -(result.abs) + 1
        end
    end
    def goals_for team
        @results[team][:goals]
    end
    def goals_against team
        @results[team][:conceded]
    end
    def goal_difference team
        @results[team][:goals] - @results[team][:conceded]
    end
    def get_wins team
        @results[team][:wins]
    end
    def get_draws team
        @results[team][:draws]
    end
    def get_losses team
        @results[team][:losses]
    end
    def get_points team
        3*@results[team][:wins] + @results[team][:draws]
    end
end