Top-level Object

So, we’ve learned that objects come with lots of methods attached to them. And we’ve seen how we can use them to do interesting things with the object, by the way of calling these methods.

Now, if you pop into irb, or if you write the following code into an otherwise empty Ruby file, this works:

$ irb
> is_a?(Object)
true
> methods
[:to_s, :inspect, ... ]

...