覆盖 Ruby 中的 == 运算符 [英] Overriding the == operator in Ruby

问题描述

根据文档，Array.include? 在对象上使用 == 比较.我来自 Java，在那里这些事情(通常)是用 .equals() 完成的，它很容易为特定对象覆盖.

According to the docs, Array.include? uses the == comparison on objects. I come from Java where such things are (usually) done with .equals() which is easy to override for a particular object.

如何在 Ruby 中覆盖 == 以允许我为我的特定对象指定 Array.include? 的行为?

How can I override == in Ruby to allow me to specify the behaviour of Array.include? for my particular object?

推荐答案

在 Ruby 中 == 只是一个方法(上面有一些语法糖，允许你编写 foo == bar 而不是 foo.==(bar)) 并且您覆盖 == 就像您使用任何其他方法一样:

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

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