Only those who confuse methods with procedures or subroutines and don’t grasp the basic attribute of methods: “In object-oriented programming, a method is a subroutine that is exclusively associated either with a class (in which case it is called a class method or a static method) or with an object (in which case it is an instance method).” [Wikipedia]

“However, regardless of whether you include return statements in a function, something is actually returned, undefined being returned if you hadn’t specified a return value.”

Perl does the same; Scala returns the value of the last statement, which often is ():Unit. There’s nothing at all “funny” about Javascript’s functions vis-a-vis any other expression-oriented language.

“PartialFunctions are cool”

All PartialFunction does is provide an interface (trait) for argument checking of functions with one argument.