Modules and functions

Modules

Modules contain groups of functions:

>> module Foo
..   def bar()
..     40
..   end
..   def baz(n)
..     n + 2
..   end
.. end
=> Foo
>> Foo.baz(Foo.bar())
=> 42

Functions belong to modules. Unlike methods, functions are pure and free of side effects.

Functions can be called using module.func form (see above)

Note: not implemented at this time, sorry

Omit the parens after applying a function to obtain a reference to it in the form of a lambda:

>> module Foo
..   def plustwo(n)
..     n + 2
..   end
.. end
=> Foo
>> ref = Foo.plustwo
=> #<Lambda Foo:plustwo>
>> ref(40)
=> 42