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Module Definition

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There are many ways to define a "module" [1] in Lua.

From a Table

-- mymodule.lua
local M = {} -- public interface

-- private
local x = 1
local function baz() print 'test' end

function M.foo() print("foo", x) end

function M.bar()
  M.foo()
  baz()
  print "bar"
end

return M

-- Example usage:
local MM = require 'mymodule'
MM.bar()

This is a common approach. It is simple, relies on no external code, avoids globals, and has few pitfalls. Externally facing variables are prefixed by "M." and clearly seen.

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Module Definition

From a Table

See Also