when would you use super instead of this ?
perhaps see Eliot Miranda’s explanation? it’s quite concise…
https://scsynth.org/t/using-superperform/5286/3
How do you differentiate them to call a class method rather than an instance method?
you don’t!
this is always the receiver of the message
in Signal.hanningWindow it’s Signal and
Signal.isKindOf(Class) == true
in Signal.new.size the receiver of size is Signal.new and
Signal.new.isKindOf(Signal)
there are some abstract classes on the edges but the “metaphysics” is still more or less as in this diagram:
3.14.class == Float
42.class == Integer
Float.class.class == Class
Integer.class.class == Class
Class.class.class = Class
Float.superclass.superclass == Number
Integer.superclass.superclass == Number
Number.superclass.superclass == Object
Object.superclass = nil
Object.class.class == Class
Class.superclass == Object