Chuck Schleutker chuckxD

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Setting up github and bitbucket on the same computer (Windows)

Guide for Windows

mix3d asked for some help using this guide with windows so here we go. This was tested with Windows 10. Run all commands in Git Bash once it's installed.

Github will be the main account and bitbucket the secondary.

Git for Windows

Download and install Git for Windows
- In the installer, select everything but decide if you want a desktop icon (2nd step)

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

	# Supporting class for demo purposes
	class DatabaseStub
	attr_reader :name

	def self.instances
	["development", "test", "ci"]
	end

	def initialize(databaseName)
	@name = databaseName

	Don't worry about what anybody else is going to do. The best way to
	predict the future is to invent it.
	-- Alan Kay

	Premature optimization is the root of all evil (or at least most of it)
	in programming.
	-- Donald Knuth

	Lisp has jokingly been called "the most intelligent way to misuse a
	computer". I think that description is a great compliment because it

	# Author: Pieter Noordhuis
	# Description: Simple demo to showcase Redis PubSub with EventMachine
	#
	# Update 7 Oct 2010:
	# - This example does not appear to work with Chrome >=6.0. Apparently,
	# the WebSocket protocol implementation in the cramp gem does not work
	# well with Chrome's (newer) WebSocket implementation.
	#
	# Requirements:
	# - rubygems: eventmachine, thin, cramp, sinatra, yajl-ruby

	=Navigating=
	visit('/projects')
	visit(post_comments_path(post))

	=Clicking links and buttons=
	click_link('id-of-link')
	click_link('Link Text')
	click_button('Save')
	click('Link Text') # Click either a link or a button
	click('Button Value')

	(function() {
	// Notes from http://news.ycombinator.com/item?id=1952531
	var notes = {
	"suspended cymbal":"zk",
	"snare":"bschk",
	"brush":"pv",
	"bass":"bk",
	"flam1":"tk",
	"roll tap":"vk",
	"flam2":"kt",

	function loadCanvasWithInputFile(){
	// canvas
	var canvas = document.getElementById('myCanvas');
	var context = canvas.getContext("2d");
	var fileinput = document.getElementById('ab'); // input file
	var img = new Image();

	fileinput.onchange = function(evt) {
	var files = evt.target.files; // FileList object
	var file = files[0];