How does Integer === 3 work?

Question

So as I understand it, the === operator tests to see if the RHS object is a member of the LHS object. That makes sense. But how does this work in Ruby? I\'m loo

Answer 1

It's defined on Module, which Class is a subclass of, which Integer is an instance of.

In other words, when you run Integer === 3, you're calling '===' (with the parameter 3) on the object referred to to by the constant Integer, which is an instance of the class named Class. Since Class is a subclass of Module and doesn't define its own ===, you get the implementation of === defined on Module.

See the API docs for Module for more information.