Tables

Defining

You can have a table with normal keys as follows

dict = {
    key1 = "Hi",
    key2 = false,
    key3 = 69,
    key4 = function()
        print("Hello World from function")
    end,
}

You can also have other non nil values as keys

dict = {
    ["str_key"] = "string key",
    [420] = "numeric key",
}

You can access keys using the dot notation like object oriented programming.
But this works for keys which are defined as identifiers.

str = dict.key1

You can also access it like javascript.

str = dict["key1"]

You can change values of existing keys.

dict.key2 = false

And you can register new keys as well

dict.newKey = 420

for key, val in pairs(table) do
    print(key, val)
end

There is a special table which tracks your global objects, including the global objects you create.

_G

x = 69

function greet()
    print("Hello World")
end

for key, value in pairs(_G) do
    print(key, value)
end