myutil.rb

module MyTime
  class TimeBase
    BASE = 60
    def initialize i
      @i = i
    end

    def to_i
      @i
    end

    def to_s
      @i.to_s
    end

    # TODO: add math operator
    def method_missing method, *args
      if @i.respond_to? method
        r = @i.__send__(method, *args)
        if r.kind_of? Fixnum
          @i = r
        else
          @i = r if r.respond_to? :to_i
        end
        self
      else
        raise NameError
      end
    end
  end

  class Hour < TimeBase
    def to_minutes
      (@i * BASE).to_minutes
    end

    def to_seconds
      to_minutes.to_seconds
    end
  end

  class Minute < TimeBase
    def to_hours
      (@i / BASE).to_hours
    end

    def to_seconds
      (@i * BASE).to_seconds
    end
  end

  class Second < TimeBase
    def to_hours
      (@i / (BASE^2)).to_hours
    end

    def to_minutes
      (@i / BASE).to_minutes
    end
  end

  def hours
    Hour.new self
  end

  def hour
    hours
  end

  def minutes
    Minute.new self
  end

  def seconds
    Second.new self
  end

  def to_hours
    hours
  end

  def to_minutes
    minutes
  end

  def to_seconds
    seconds
  end
end

class Numeric
  include MyTime
  def m
    (self.k).k
  end

  def k
    self * 1000
  end

  def b
    ((self.k).k).k
  end

  def h
    self * 100
  end
end

class Fixnum
  %w(+ - * / += -= *= /= ** %).each do |op|
    define_method(op) {|n| eval "self.to_f #{op} n" }
  end
end


class Object
  def dump
    Marshal.dump(self)
  end
end