Programming Ruby 3.3

Class

Classes in Ruby are first-class objects—each is an instance of class Class. Since Class is a subclass of Module, most of the behavior of Class is actually defined in the class Module (see ​Module​). The Class class itself adds a small number of new methods.

You can create an anonymous class with Class.new and assign it to a variable and use it like a regularly defined class. If you assign it to a variable whose name starts with a capital letter, it’s treated as a constant and behaves exactly like a regularly defined class.

When a new class is defined (typically using class SomeName ... end), an object of type Class is created and assigned to a constant (SomeName, in this case). When SomeName.new is called to create a new object, the ...