Module extend_function.lua

📑 Source

Takes the original function and a callback that receives the old function and arguments.

You can decide if you want to call the old function and in which order to do operations.

Usage

local function add (a, b)
  a + b
end

local multiplyAWithTwoAndAdd = extend_function(add, function(og, a, b) og(a * 2, b) end)

Functions

# returns... (original_fn, extender_fn)

Parameters

  • original_fn function The function being extended
  • extender_fn function The function that extends.

Returns

    function extended_fn Takes the same arguments as original function
# extender_fn ()
Extender function takes the original function as first argument followed by the arguments the original function takes.

Returns

    any Usually similar to the original_fn
# extended_fn ()
The wrapper that takes same args as the original fn

Returns

    Equal to the return of the extender_fn