JosePedroDias

var listToArr = function(lst) {
    var l = lst.length;
    var arr = new Array(l); // optimizable *list-to-array
    for (var i = 0; i < l; ++i) {
        arr[i] = lst[i];
    }
    return arr;
};

JosePedroDias

var ctx = this; // this can be skipped if you don't care about the context

var argsL = arguments.length;
var args = new Array(argsL); // optimizable arguments-to-array
for(var i = 0; i < argsL; ++i) {
    args[i] = arguments[i];
}

JosePedroDias

var removeCycles = function(o) {
    var seen = [];

    var s = JSON.stringify(o, function(k, v) {
       if (v !== null && typeof v === 'object') {
            if (seen.indexOf(v) !== -1) {
                //return;
                v = '[removed]';
            }
            else {

JosePedroDias

var os = require('os');

var getMyIPs = function() {
    var ips = {};
    var ifaces = os.networkInterfaces();

    var onDetails = function(details) {
        if (details.family === 'IPv4') {
            ips[ dev ] = details.address;
        }

staltz

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.

---

devongovett

#!/usr/bin/env phantomjs

var system = require('system');
var text = encodeURIComponent(system.stdin.read());
var url = "http://translate.google.com/#auto/en/" + text;
 
var page = require('webpage').create();
page.settings.userAgent = 'Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:13.0) Gecko/20100101 Firefox/13.0';
 
page.onConsoleMessage = function (msg) {

kevin-smets

Default

Powerlevel10k

mathiasbynens

// Here’s a 100% deterministic alternative to `Math.random`. Google’s V8 and
// Octane benchmark suites use this to ensure predictable results.

Math.random = (function() {
	var seed = 0x2F6E2B1;
	return function() {
		// Robert Jenkins’ 32 bit integer hash function
		seed = ((seed + 0x7ED55D16) + (seed << 12))  & 0xFFFFFFFF;
		seed = ((seed ^ 0xC761C23C) ^ (seed >>> 19)) & 0xFFFFFFFF;
		seed = ((seed + 0x165667B1) + (seed << 5))   & 0xFFFFFFFF;

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

domenic

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.