How do you access functions in module scripts?

Interestingly someone just asked me this on a twitch stream. I have a funny feeling this isn't coincidence :p

There are two things you need for a module to work.

• A ModuleScript somewhere in the game

• A script that Requires the module.

The ModuleScript:

local Module = {}

Module.SomeFunction = function(parameters)
	-- code
end

Module.AnotherFunction = function(moreparameters)
	-- code
end

return Module 

In a Server Script...

local module = require(game.ServerScriptService.Module)

module.SomeFunction(parametertopass)

end

A more practical example:

local AddModule = {}

AddModule.Add = function(a,b)
	return a+b
end

return AddModule

Server Script:

local add = require(game.ServerScriptService.AddModule)

print(add.Add(2,3)) -- will print 5.

Note that modules will cache, so print(add.Add(2,3)) will print 5, and all subsequent calls will also return 5. (print(add.Add(10000,10000) will print 5 etc etc)

I hope my explanation helped. The wiki page is also very useful

http://wiki.roblox.com/index.php?title=API:Class/ModuleScript