tincho

// pre-ES6
function _ary(fn, arity) {
    arity = arity || 1;
    return function() {
        // could use Array.from(arguments).slice(0, arity) ?
        var args = Array.prototype.slice.call(arguments, 0, arity);
        return fn.apply(null, args);
    };
}

tincho

/**
 * @license MIT
 * @requires AngularJs 1.x
 * @author github.com/tincho
 * Tiny helper for listener deregistration on scope destroy
 * You'll have to wrap it up in a module/provider/whatever
 * (that's out of my focus)
 */
function LDisposer(scope) {
   var _list = [];

tincho

// first iteration
// v0.1

(function(globalObject, document) {

  function randomItem(collection) {
    var index = Math.floor(Math.random() * collection.length);
    return collection[index];
  }

tincho

// var logHello = _partial(console.log, "hello ");
// logHello("world");
// accepts _partial (fn reference) as placeholder just like underscore accepts _
// var partialApplied = _partial(originalFn, _partial, "second", _partial, "fifth");
// partialApplied("first", "third") will call originalFn("first", "second", "third", "fifth")
function _partial() {
    var args = Array.prototype.slice.call(arguments);
    var method = args.shift();
    var self = this;

tincho

var form = document.getElementById("dlFile");

form.onsubmit = function(e) {
  e.preventDefault();
  var user = form.user.value; // "mayoristas";
  var pass = form.pass.value;
  requestFile(user, pass);
  return false;
}

tincho

// requires jQuery!

const noop = () => {};
const constant = v => () => v;
const beTrue = constant(true); // () => true;
function $Ajaxify(form, ...callbacks) {

  if (typeof callbacks[0] === 'object') {
    var {
      onSuccess = noop, onError = noop, beforeSend = beTrue

tincho

Table of Contents generated with DocToc

• FrontEnd Masters - ES6 notes
  • Proper Tail Call (PTC)
  • Function Hoisting
  • Variables
    • Temporal Dead Zone
• Rest Parameters

tincho

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

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.

---

tincho

// both answers copied from challange posted at e-mail list of my former job

// not-so oneliner
var compose = function () {
    var composableFunctions = Array.prototype.slice.call(arguments).reverse();
    return (x) => composableFunctions.reduce((result, composable) => composable(result), x);
  /*
  ES5:
  return function(x) {
    return composableFunctions.reduce(function(result, composable) {

tincho

function getData(uri, done, evt) {

    var request = new XMLHttpRequest();

    request.open('GET', uri);
    request.onreadystatechange = function() {
    	if(! (request.readyState == 4 && request.status === 200)) {
            return;
        }
        return done(request);