OOP in Lua

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This is a scripting tutorial that teaches you how to start using an Object-Oriented developing interface with Lua.

Glossary

• environment: either a table or an array containing values.

Initialising

There is a basic and simple predefined variables we should recognize and know: self. Which refers to the environment within which we are executing a code.

Our first environment

local array = {}
function array:example (argument)
	return "Hello"
end

What we do upon above is defining a local environment and then declaring the function example as part of it.

Alright, so how should we proceed in order to call the mentioned function? As follows:

array:example()
array.example(array, example)

As Lua is so cool, we're able to call a function using two methods: ":" and ".". As you can see on the example above, if we use a dot we're supposed to send self's value to the function. Yes, that's right, and in case we use a colon, self's value will be the environment within which we are executing a code, i.e. array.

See Also

• MTA's built-in OO-system.
• MTA's built-in OO-functions.