Override == operator in Ruby

Question

According to the docs, Array.include? uses the == comparison on objects. I come from Java where such things are (usually) done with

Answer 1

In Ruby == is just a method (with some syntax sugar on top allowing you to write foo == bar instead of foo.==(bar)) and you override == just like you would any other method:

class MyClass
  def ==(other_object)
    # return true if self is equal to other_object, false otherwise
  end
end

Answer 2

As described above, == is a method is Ruby and can be overrided. You will just write down the equality condition.

class Person
  attr_reader :name, :gender, :social_id
  attr_accessor :age

  def initialize(name, age, gender, social_id)
    self.name = name
    self.age = age.to_i
    self.gender = gender
    self.social_id = social_id

  def ==(other)
    social_id == other.social_id

You don't need to override other methods any more