Aliasing Methods : alias « Method « Ruby






  1. Ruby
  2. Method
  3. alias

Aliasing Methods


class MyClass
  attr_accessor :name, :unit_price

  def initialize(name, unit_price)
    @name, @unit_price = name, unit_price
  end

  def price(quantity=1)
    @unit_price * quantity
  end

  # Make MyClass#cost an alias for MyClass#price
  alias :cost :price

  # The attr_accessor decorator created two methods called "unit_price" and
  # "unit_price=". I'll create aliases for those methods as well.
  alias :unit_cost :unit_price
  alias :unit_cost= :unit_price=
end

bacon = MyClass.new("Bacon", 3.95)
bacon.price(100)                                   # => 395.0
bacon.cost(100)                                    # => 395.0

bacon.unit_price                                   # => 3.95
bacon.unit_cost                                    # => 3.95
bacon.unit_cost = 3.99
bacon.cost(100)                                    # => 399.0








Related examples in the same category

1.Give length a new name
2.Alias a old method a new name, then change the implementation of old method
3.Create a Wrapper method to alias
4.Redefining Backquotes