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A re-introduction to JavaScript (JS Tutorial) - JavaScript

A re-introduction to JavaScript (JS Tutorial) - JavaScript
IntroductionEdit Why a re-introduction? Because JavaScript is notorious for being the world's most misunderstood programming language. It is often derided as being a toy, but beneath its layer of deceptive simplicity, powerful language features await. JavaScript is now used by an incredible number of high-profile applications, showing that deeper knowledge of this technology is an important skill for any web or mobile developer. It's useful to start with an overview of the language's history. Several months later, Microsoft released JScript with Internet Explorer 3. Because it is more familiar, we will refer to ECMAScript as "JavaScript" from this point on. Unlike most programming languages, the JavaScript language has no concept of input or output. OverviewEdit JavaScript is a multi-paradigm, dynamic language with types and operators, standard built-in objects, and methods. Let's start off by looking at the building blocks of any language: the types. NumbersEdit parseInt('11', 2); NaN + 5;

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Node.js real time logging with Winston, Redis and, p2 Following up on my last blog post Node.js real time logging with Winston, Redis and, p1 I want to get into the integration of winston with to stream logs real time to a browser. So just a quick recap, the idea here is to have a mechanism that logs messages categorized by different levels in the server and displays them at the same time in the browser, keeping the user informed at all times of the action in the back end, or helping a developer spot some bugs without the need to keep an eye on the terminal console or searching for log files buried in the server. So first we need to initialize the lib. This part could be done several different ways, I haven’t found a baseline to follow when initializing and sharing a handler on express, so if anybody knows please hit me up in the comments. Anyway, the approach I decided to take was:

Image-6 Grayscale In this section, we'll look at the structure of grayscale vs. color images, and some code to play with that difference. Gray Among The RGB Visit the RGB explorerFigure out how to make a shade of gray e.g. RGB values to make: dark gray, medium gray, light gray We'll say that these grays lack "hue" Answer: the RGB scale is calibrated so that when all three red/green/blue numbers of a pixel are equal, the pixel is a shade of gray. Making all the numbers equal, like red=50 green=50 blue=50 drains any bias towards red, green, or blue.

Backbone patterns Building apps with Backbone.js Here, I try to document the good practices that our team has learned along the way building Backbone applications. This document assumes that you already have some knowledge of Backbone.js, jQuery, and of course, JavaScript itself. ECMAScript History[edit] JavaScript was originally developed by Brendan Eich of Netscape under the name Mocha, later LiveScript, and finally renamed to JavaScript.[1] In December 1995, Sun Microsystems and Netscape announced JavaScript in a press release.[2] In March 1996, Netscape Navigator 2.0 was released, featuring support for JavaScript. Owing to the widespread success of JavaScript as a client-side scripting language for web pages, Microsoft developed a compatible dialect of the language, naming it JScript to avoid trademark issues.

christianalfoni WebApp Enthusiast So this little library Baobab continues to surprise me. The previous article I wrote on this used a strategy where you would lock up all your components, but have a dependency to the state tree of the application in each component that needed it. The individual components could point cursors into the state tree, allowing the component to extract state from the state tree and render itself whenever the cursor notified about a change. This optimized the rendering of React JS and gave a very good FLUX structure to your application. When going isomorphic though... wait, let me explain what an isomorphic app is before we move on. Typically with a single page application you pass only som basic HTML and script tags on the initial page request.

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. The essence stays invisibly below. Inside the computer’s world, there is only data.

Patterns For Large-Scale JavaScript Application Architecture Today we're going to discuss an effective set of patterns for large-scale JavaScript application architecture. The material is based on my talk of the same name, last presented at LondonJS and inspired by previous work by Nicholas Zakas. Who am I and why am I writing about this topic?

Lonely Pixel - A simple, easy to use, versatile and customisable colour picker. click me View Picker on Github.Codepen Demo. Using Picker is as simple as this: JavaScript JavaScript is classified as a prototype-based scripting language with dynamic typing and first-class functions. This mix of features makes it a multi-paradigm language, supporting object-oriented,[6] imperative, and functional[1][7] programming styles. JavaScript has been standardized in the ECMAScript language specification. History[edit] Beginnings at Netscape[edit] JavaScript was originally developed by Brendan Eich, while working for Netscape Communications Corporation.

Backend Apps with Webpack (Part I) Webpack is an amazing tool. It calls itself a "module bundler" but it is much more than that: it provides an infrastructure for building, transforming, and live updating modules. While its wall of configuration options may not be your style, this approach works really well for the problem it's solving. 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.

The 30 CSS Selectors you Must Memorize So you learned the base id, class, and descendant selectors—and then called it a day? If so, you're missing out on an enormous level of flexibility. While many of the selectors mentioned in this article are part of the CSS3 spec, and are, consequently, only available in modern browsers, you owe it to yourself to commit these to memory. 10 Tips for Writing JavaScript without jQuery Danny Markov jQuery is a great library. It came to be around the time when IE6 was the number one browser. Back then, there were quirks and differences that were tedious to work around and jQuery was the perfect tool for writing cross browser code.

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