Userdata Declaration

Always use the local keyword within any scope, including the top one. Functions have function syntax, variables have variable syntax.

When defining functions, put local function before the name, not after.

Foo = 5 -- Bad

local Foo = 5 -- Good

function Bar() -- Bad

end

local Bar = function() -- Bad

end

local function Bar() -- Good

end

By using the local keyword, you are increasing modularity by explicitly definiting the scope of the value. Functions are also written in local function format for readability purposes.