Ruby class names and assignment
In general each Ruby class has a name. It can be obtained by calling
Class#name. There is an exception to this however: anonymous
classes. The simplest way to create an anonymous class is through
the constructor Class.new. As could be expected, anonymous
classes’ name is nil. This name however can’t be directly
assigned: there is no Class#name=. I was surprised to learn
however, that there is still a mechanism through which a name can be
assigned to an anonymous class. Assigning an anonymous class to a
constant will assign the constant’s name as the class name.
irb(main):001:0> my_class = Class.new => #<Class:0x0000561172d87b40> irb(main):002:0> my_class.name => nil irb(main):003:0> MyClass = my_class => MyClass irb(main):004:0> my_class.name => MyClass