Things to remember when working with Lua

The following are concepts that you need to keep in mind when working with Lua.

Comments

A comment can be anything between a double-hyphen and the end of the line:

--This is a comment

Comment blocks are also supported. They are delimited by the --[[ and ]] characters:

--[[
This is a multi-line comment block.
]]

Dummy assignments

There are occasions where you don't need all the information returned by a function, and in Lua, you can use dummy assignments to discard a return value. The operator is _ (underscore):

local _, _, item = string.find(<string>, <pattern with capture>)

Indexes

Indexes start at one, not zero:

z={"a","b","c"}
z[1]="b" --This assignment will change the content of the table to
{"b","b","c"}

However, you can initialize an array at any value:

nmap = {}
for x=-1337, 0 do nmap[x] = 1
end

Important note...