alessioalex

/**
 * Polyfill of DOMTokenList for IE < 9
 * Monkey patch of .add, .remove for IE 10 / 11, Firefox < 26 to support multiple arguments
 * Monkey patch of .toggle for IE 10 / 11, Firefox < 24 to support second argument
 */
/*global define: false, module: false */
/*jslint nomen: true */
(function domTokenListModule(global, definition) { // non-exporting module magic dance
    'use strict';

alessioalex

(function() {
  var Match, calculate_operations, consecutive_where, create_index, diff, find_match, find_matching_blocks, html_to_tokens, is_end_of_tag, is_start_of_tag, is_tag, is_whitespace, isnt_tag, op_map, recursively_find_matching_blocks, render_operations, wrap;

  is_end_of_tag = function(char) {
    return char === '>';
  };

  is_start_of_tag = function(char) {
    return char === '<';
  };

alessioalex

// Basic AES example using the defaults.
// https://github.com/bitwiseshiftleft/sjcl

var password = "password";
var text = "my secret text";
var parameters = { "iter" : 1000 };
var rp = {};
var cipherTextJson = {};

sjcl.misc.cachedPbkdf2(password, parameters);

alessioalex

var assert = require('assert');
var net = require('net');
var open = process.binding('fs').open;
var sendfile = process.binding('fs').sendfile;

if (process.argv.length < 4) {
    console.error('usage: sendfile <port> <path>');
    process.exit(1);
}

alessioalex

/*
import express from 'express';
import db from './core/db';

const app = express();
const port = process.env.PORT || 3000;

app.get('/visits', (req, res, next) => {
  db.connect(async ({ query } => {
    await query('INSERT INTO visit (date) VALUES ($1)', new Date());

alessioalex

#System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

##Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

alessioalex

/**
 * POST to create a new user.
 */

exports.create = function *(){
  var body = yield parse(this);

  // password
  var pass = body.password;
  assert(pass, 400, 'password is required');

alessioalex

Virtual DOM and diffing algorithm

There was a [great article][1] about how react implements it's virtual DOM. There are some really interesting ideas in there but they are deeply buried in the implementation of the React framework.

However, it's possible to implement just the virtual DOM and diff algorithm on it's own as a set of independent modules.

alessioalex

{
  "name": "my-app",
  "version": "0.0.0",
  "dependencies": {
    "browserify": "~2.36.1",
    "less": "~1.5.1"
  },
  "devDependencies": {
    "watchify": "~0.4.1",
    "catw": "~0.2.0"

alessioalex

node-websocketd

A lightweight node port of websocketd, originally written in go.

Usage

node-websocketd --port=8080 ./count.sh