A metatable in Lua defines various extraneous behaviors for a table when indexed, modified, interacted with, etc. They are Lua's core metaprogramming feature; most well known for being useful to emulate classes much like an OOP language.
Any table (and userdata) may be assigned a metatable. You can define a metatable for a table as such:
-- Our sample table
local tab = {}
-- Our metatable
local metatable = {
-- This table is then what holds the metamethods or metafields
| # Stick this in your home directory and point your Global Git config at it by running: | |
| # | |
| # $ git config --global core.attributesfile ~/.gitattributes | |
| # | |
| # See https://tekin.co.uk/2020/10/better-git-diff-output-for-ruby-python-elixir-and-more for more details | |
| *.c diff=cpp | |
| *.h diff=cpp | |
| *.c++ diff=cpp | |
| *.h++ diff=cpp |
| /* bling.js */ | |
| window.$ = document.querySelector.bind(document); | |
| window.$$ = document.querySelectorAll.bind(document); | |
| Node.prototype.on = window.on = function(name, fn) { this.addEventListener(name, fn); }; | |
| NodeList.prototype.__proto__ = Array.prototype; | |
| NodeList.prototype.on = function(name, fn) { this.forEach((elem) => elem.on(name, fn)); }; |
| #compdef -P pip[0-9.]# | |
| # | |
| # Completion script for pip (http://pypi.python.org/pypi/pip). | |
| # | |
| # Taken from https://github.com/zsh-users/zsh-completions/commit/890f3701 | |
| # (where it got removed). Original source: | |
| # https://github.com/technolize/zsh-completion-funcs. | |
| # | |
| # Currently maintained in https://gist.github.com/blueyed/54a257c411310a28805a. |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
