Kapil Tekwani kapiltekwani

GROKKING NOTES

I liked the way Grokking the coding interview organized problems into learnable patterns. However, the course is expensive and the majority of the time the problems are copy-pasted from leetcode. As the explanations on leetcode are usually just as good, the course really boils down to being a glorified curated list of leetcode problems.

So below I made a list of leetcode problems that are as close to grokking problems as possible.

Pattern: Sliding Window

The Ultimate Unit Testing Cheat-sheet

For Mocha, Chai and Sinon

using mocha/chai/sinon for node.js unit-tests? check out my utility: mocha-stirrer to easily reuse test components and mock require dependencies

Sinon Chai
Chai
Sinon
Mocha

Install MySQL on OS X El Capitan

Normally the installation of MySQL can be achieved with a single command, which executes a script provided by MacMiniVault : bash <(curl -Ls http://git.io/eUx7rg)

However, at the time of writing the script is not compatible with OS X El Capitan (10.11)

Install MySQL using Homebrew

An alternative to the aforementioned installation script is installing MySQL using Homebrew. This gist assumes you already have Homebrew installed, if not first read the article "Homebrew and El Capitan"

Make sure Homebrew has the latest formulae, so run brew update first

	module Memory
	# sizes are guessed, I was too lazy to look
	# them up and then they are also platform
	# dependent
	REF_SIZE = 4 # ?
	OBJ_OVERHEAD = 4 # ?
	FIXNUM_SIZE = 4 # ?

	# informational output from analysis
	MemoryInfo = Struct.new :roots, :objects, :bytes, :loops

	var app = require('express').createServer(),io = require('socket.io').listen(app),http = require('http');
	app.listen(8080);

	app.get('/', function (req, res) {
	res.sendfile(__dirname + '/index.html');
	});

	io.sockets.on('connection', function (socket) {
	var options = {
	host: 'www.google.com',

	// Load the TCP Library
	net = require('net');

	// Keep track of the chat clients
	var clients = [];

	// Start a TCP Server
	net.createServer(function (socket) {

	// Identify this client

	var app = require('express')()
	, server = require('http').createServer(app)
	, io = require('socket.io').listen(server);

	server.listen(3012);

	app.get('/', function (req, res) {
	res.sendfile(__dirname + '/index.html');
	});

	Munin Passenger Plug-in Installation

	Configure the passenger plug-ins according the the guide on http://www.alfajango.com/blog/how-to-monitor-your-railspassenger-app-with-munin/

	NOTE: restart munin after implementing the following changes for Single-User RVM

	sudo nano /etc/munin/plugin-conf.d/munin-node

	[passenger_*]
	user root