Minh Tam Du duminhtam

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

Stores data elements based on an sequential, most commonly 0 based, index.
Based on tuples from set theory.

	First, install nginx for mac with "brew install nginx".

	Then follow homebrew's instructions to know where the config file is.

	1. To use https you will need a self-signed certificate: https://devcenter.heroku.com/articles/ssl-certificate-self
	2. Copy it somewhere (use full path in the example below for server.* files)
	3. sudo nginx -s reload
	4. Access https://localhost/

	Edit /usr/local/etc/nginx/nginx.conf:

	var WebSocket = require('ws')

	// open 200 connections that close after 5 seconds
	for (var i = 0; i < 200; i++) { openWs() }

	function openWs() {
	var ws = new WebSocket('ws://localhost:8080')
	ws.on('open', function() {
	ws.send('hello')
	setTimeout(function() { ws.close(); }, 5000)

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048