Leroy Campbell artisonian

Learn JavaScript concepts with the Chrome DevTools

Authored by Peter Rybin , Chrome DevTools team

In this short guide we'll review some new Chrome DevTools features for "function scope" and "internal properties" by exploring some base JavaScript language concepts.

Closures

Let's start with closures – one of the most famous things in JS. A closure is a function, that uses variables from outside. See an example:

The new Secure Password Hashing API in PHP 5.5

The [RFC for a new simple to use password hashing API][rfc] has just been accepted for PHP 5.5. As the RFC itself is rather technical and most of the sample codes are something you should not use, I want to give a very quick overview of the new API:

Why do we need a new API?

Everybody knows that you should be hashing their passwords using bcrypt, but still a surprising number of developers uses insecure md5 or sha1 hashes (just look at the recent password leaks). One of the reasons for this is that the crypt() API is ridiculously hard to use and very prone to programming mistakes.

	// Straightforward + simple.
	$("button").on("click", function(event) {
	event.preventDefault();
	var button = $(this);
	var numberElem = button.find(".number");
	var number = Number(numberElem.text()) - 1;
	numberElem.text(number);
	if (number === 0) {
	button.prop("disabled", true);
	button.off("click");

	# ~/.gitconfig
	# Add this to your global git configuration file
	# Change phpstorm to webstorm, if you use that.

	# Diff and merge tool changes
	# Run `git difftool <directory/file>...` or `git mergetool <directory/file>...`
	[merge]
	tool = phpstorm
	[diff]
	tool = phpstorm

	// Source: https://groups.google.com/forum/#!topic/angular/hVrkvaHGOfc
	// jsFiddle: http://jsfiddle.net/pkozlowski_opensource/PxdSP/14/
	// author: Pawel Kozlowski

	var myApp = angular.module('myApp', []);

	//service style, probably the simplest one
	myApp.service('helloWorldFromService', function() {
	this.sayHello = function() {
	return "Hello, World!"

	;; based on core.logic 0.8-alpha2 or core.logic master branch

	(ns sudoku
	(:refer-clojure :exclude [==])
	(:use clojure.core.logic))

	(defn get-square [rows x y]
	(for [x (range x (+ x 3))
	y (range y (+ y 3))]
	(get-in rows [x y])))

	_.mixin({

	// Get/set the value of a nested property
	deep: function (obj, key, value) {

	var keys = key.replace(/\[(["']?)([^\1]+?)\1?\]/g, '.$2').replace(/^\./, '').split('.'),
	root,
	i = 0,
	n = keys.length;

	;; Datomic example code
	;; Demonstrates using datalog with Clojure defrecords
	(use '[datomic.api :only [q db] :as d])

	;;; http://www.lshift.net/blog/2010/08/21/some-relational-algebra-with-datatypes-in-clojure-12
	(defrecord Supplier [number name status city])
	(defrecord Part [number name colour weight city])
	(defrecord Shipment [supplier part quantity])

	;; sample data

	(deftheme bubbleberry "bubbleberry")

	;; Based on the theme used for LightTable (see: http://www.chris-granger.com/images/lightable/main.png )

	(custom-theme-set-variables
	'bubbleberry
	'(linum-format " %7i ")
	'(fringe-mode 5 nil (fringe))
	'(powerline-color1 "#3d3d68")
	'(powerline-color2 "#292945")

	//usage
	withAdvice.call(targetObject);

	//mixin augments target object with around, before and after methods
	//method is the base method, advice is the augmenting function
	withAdvice: function() {
	['before', 'after', 'around'].forEach(function(m) {
	this[m] = function(method, advice) {
	if (typeof this[method] == 'function') {
	return this[method] = fn[m](this[method], advice);