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Learning Javascript with Object Graphs

Learning Javascript with Object Graphs
HEADS UP! This article was written for an older version of node. More up-to-date information may be available elsewhere. One of the secrets to being a super effective JavaScript developer is to truly understand the semantics of the language. This article will explain the basic elemental parts of JavaScript using easy to follow diagrams. References Everywhere A variable in JavaScript is simply a label that references a value in memory somewhere. Local Variables In the following example, we will create four local variables in the top-level scope and point them to some primitive values: variables.js // Let's create some local variables in the top scopevar name = "Tim Caswell";var age = 28;var isProgrammer = true;var likesJavaScript = true;// Test to see if the two variables reference the same valueisProgrammer === likesJavaScript; Notice that the two boolean variables point to the same value in memory. The outer box represents the outermost closure scope. Objects and Prototype Chains objects.js

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Learning Javascript with Object Graphs (Part II) Static Version The first article using graphs to describe JavaScript semantics was so popular that I've decided to try the technique with some more advanced ideas. In this article I'll explain three common techniques for creating objects. 10 Puzzle Websites to Sharpen Your Programming Skills By Ben Dowling Solving programming puzzles is a fun way to develop your logical and problem solving abilities. Also, when you’re familiarizing yourself with a new programming language, solving puzzles for that language can help speed up the learning process. Here are the top 10 popular programming puzzle sites that will help test your thinking and improve your programming, problem solving, and logical thinking skills. 1. Programming Praxis

Preparing Yourself for Modern JavaScript Development There is a lot going on in the JavaScript world these days, both in and out of the browser. Talk about script loaders, client side MVC frameworks, minifiers, AMD, Common.js, Coffeescript, can quickly get your head spinning. And for those people who are completely immersed in that world, it can be easy to forget that the vast majority of JavaScript developers today haven’t heard of any of these tools, and in fact, they likely aren’t even equipped to try these tools. This post is going to be an attempt to simply address some of the low hanging fruit out there, and try to bring together a few different concepts that a developer should understand before they go out and try to tackle something like Backbone.js or Ember.js. Once you understand most of the concepts in this post, then you can go out and approach more advanced JavaScript topics with a bit of confidence.

Waterbear - a visual language for Javacript Waterbear, a new "Scratch- like" visual programming language made its debut at a JavaScript conference this week. Waterbear is the brainchild of Dethe Elza who presented it at the JSConf held in Portland on 2-3 May 2011. Inspired by Alan Kay's Squeak language and Semour Papert's Mindstorms he hope it will introduce programming concepts to learners, including children. JavaScript from Null: Chapter 4 JavaScript University continues today as we learn about methods of the Array object, how to return values from functions, scope, and even your first animation. Remember - though each new chapter builds upon the previous ones, you can still follow along perfectly well if you haven't watched the other entries in the series! In this Screencast, you'll Learn: Methods of the Array object: push, pop, unshift, shift Pull values outside of functions Reducing your "global footprint" by creating an object SetInterval Create your first animation Methods of the String object. Chapter 4: Arrays, Functions, and your First Animation

Learning Javascript with Object Graphs (Part III) Static Version Part I of this series explained basic object graphs and visually described references, closures, and basic inheritance in JavaScript. Part II compared different styles for doing object-oriented programming in JavaScript. Now in Part III we'll get creative and look as Ruby's object model and compare it to how JavaScript works. Also I'll show how to implement some Ruby style classes. 8 ways to be a better programmer in 6 minutes. 'hacka' on Sun, 08 Feb 2009 10:12:44 GMT, sez: stop using .net 'lb' on Sun, 08 Feb 2009 10:14:27 GMT, sez: Badass JavaScript David Herman, Luke Wagner, and Alon Zakai (also the developer of Emscripten) of Mozilla have been working on the asm.js spec, which aims to be a subset of the JavaScript language that can be highly optimized after you have opted in. It is designed mostly for compilers like Emscripten to target, but the best part is that it’s backwards compatible with the existing JS syntax since it is a strict subset. This means that asm.js code will still run on older browsers, although not in the optimized path taken in enhanced JS engines. You opt-in to using asm.js by including the "use asm"; string at the top of your file or individual function, just like you opt into strict mode with "use strict";. Once you’ve done that, the ahead-of-time (AOT) optimizing compiler will kick in in supported engines, looking for type annotations and validating the code to make sure it really is optimizable.

Sophisticated WebApps with Dojo Ready-for-Business MVC Application Controller & DataBinding Building Web Apps is about connecting your beautiful user interface to services and data across the web. Fantastic Micro-Frameworks and Micro-Libraries for Fun and Profit! I need ... a base framework. a DOM utility. templating. Why use "closure"? Static Version One of the greatest features of the JavaScript language is closure. I've discussed this concept some in the "What is This?" Programming 101 - The 5 Basic Concepts of any Programming Language - How to Program with Java First off, I’d like to say that I’m writing these preliminary posts in a way that I’ll assume you have very little knowledge in programming. I want this content to provide anyone “walking in off the street” the knowledge to be able to write their first program with the Java programming language with as little pain as possible. So, let’s get started with our first topic: The 5 basic concepts of any programming language.

Values, Types, and Operators Below the surface of the machine, the program moves. Without effort, it expands and contracts. In great harmony, electrons scatter and regroup. The forms on the monitor are but ripples on the water. Dojo Mobile Ready-for-Business Forms & Data Dojo includes a new set of components designed from scratch with mobile in mind, including forms and databinding. Switches, Sliders, Lists, Actions etc. MVC - DataBinding & App Controller

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