DailyJS: Matter.js
Matter.js (GitHub: liabru / matter-js, License: MIT) by Liam Brummitt is a stable and flexible rigid body physics engine for browsers. The author describes it as an alpha project that came about as a result of learning game programming. If you’re interested in reading more about physics for game programming, Liam has collected some useful resources in Game physics for beginners. Matter.js uses tim
DailyJS: JavaScript Promises ... In Wicked Detail
This post is by Matt Greer. You can find the original here: mattgreer.org/articles/promises-in-wicked-detail/ I’ve been using Promises in my JavaScript code for a while now. They can be a little brain bending at first. I now use them pretty effectively, but when it came down to it, I didn’t fully understand how they work. This article is my resolution to that. If you stick around until the end, yo
DailyJS: Confused About Components
Client-side development has been shifting away from monolithic libraries. While jQuery is still hugely popular, building projects from smaller libraries is increasingly common. To make this easier to deal with, projects have appeared to manage dependencies. These tools may be simple package managers, or a combination of a build tool and a package manager. Recent History Client-side package manager
DailyJS: The Art of Error
Error was originally a character in the hit video game, "Zelda". I like to define a lot of objects that inherit from Error. I find it helps me to track down issues – post-mortem – but also to clearly handle expected errors. Sometimes writing error handling code feels like a chore, but it shouldn’t be an afterthought. Well-designed and well-tested errors will help you maintain projects, but also he
DailyJS: JavaScript Developer Survey 2013: Results
The JavaScript Developer Survey has now closed. As always the results are available to the community for further analysis: Summary Raw spreadsheet data (zipped CSV) Results for 2012 51% of readers write client-side code, while 28% said they write server-side code. Last year client-side was at 98%, so I imagine this is partly due to a changing audience on DailyJS, but it’s interesting how strong se
DailyJS: New Features in npm
npm is moving fast, so here are some features you might have missed since 1.3.7. Remove devDependencies We’ve noticed people running into situations where ./node_modules gathers cruft. For example, installing devDependencies during deployment due to various reasons. To clean up in npm 1.3.10 and above, just run: npm prune --production Repository Shorthands Use the shorthand "username/repo" for the
DailyJS: Unix: It's Alive!
On a philosophical level, Node developers love Unix. I like to think that’s why Node’s core modules are relatively lightweight compared to other standard libraries (is an FTP library really necessary?) – Node’s modules quietly get out of the way, allowing the community to provide solutions to higher-level problems. As someone who sits inside tmux/Vim/ssh all day, I’m preoccupied with command-line
DailyJS: New Control Flow Libraries
There are a lot of control flow libraries for Node. Most libraries seek to wrap more complex patterns like promises with a simpler API, and others place a unique emphasis on a particular aspect of control flow. Some are the result of extracting generic functionality from another project, and others purport to be the next great ‘async micro-framework’. Here are some interesting new control flow lib
DailyJS: LevelDB and Node: What is LevelDB Anyway?
This is the first article in a three-part series on LevelDB and how it can be used in Node. This article will cover the LevelDB basics and internals to provide a foundation for the next two articles. The second and third articles will cover the core LevelDB Node libraries: LevelUP, LevelDOWN and the rest of the LevelDB ecosystem that’s appearing in Node-land. What is LevelDB? LevelDB is an open-so
DailyJS: Five Minute Guide to Streams2
Node 0.10 is the latest stable branch of Node. It’s the branch you should be using for Real Work™. The most significant API changes can be found in the stream module. This is a quick guide to streams2 to get you up to speed. The Base Classes There are now five base classes for creating your own streams: Readable, Writable, Duplex, Transform, and PassThrough. These base classes inherit from EventEm
DailyJS: JS101: Call, Apply, and Bind
Last week we looked at this, and how it can be assigned and manipulated. The example I gave showed that a function inside another function (or method) will resolve this to the global object, and I used var self = this to reference the intended object. Reader n1k0 pointed out another solution: Function.prototype.call: Shape.prototype = { move: function(x, y) { this.x += x; this.y += y; function che
DailyJS: Backbone.js Tutorial: Spies, Stubs, and Mocks
Part 1: Build Environment Part 2: Google's APIs and RequireJS Part 3: Authenticating with OAuth2 Part 4: Backbone.sync Part 5: List Views Part 6: Creating Lists Part 7: Editing Lists Part 8: Deleting Lists Part 9: Tasks Part 10: Oh No Not More Tasks Part 11: Spies, Stubs, and Mocks Preparation Before starting this tutorial, you’ll need the following: alexyoung / dailyjs-backbone-tutorial at commit
DailyJS: Meet the New Stack, Same as the Old Stack
Five years ago, if you asked any client-side developer which library or framework to use the most likely answer would have been jQuery. Since then, client-side development has become far more complex. A friendly wrapper for DOM programming and a browser compatibility layer isn’t enough to help us write modern applications. Starting a project today involves selecting a package manager, module syste
DailyJS: Backbone.js Tutorial: Google's APIs and RequireJS
Part 1: Build Environment Part 2: Google's APIs and RequireJS In Part 1: Build Environment, I explained how to set up a simple Node server to host your Backbone.js app and test suite. Something that confused people was the way I used relative paths, which meant the tests could fail if you didn’t visit /test/ (/test won’t work). There was a reason for this: I developed the original version to run o
DailyJS: Totally Testacular
We are now 100% relying on @testacularjs. Finally! plus.google.com/11032358723052…— AngularJS (@angularjs) October 18, 2012 Vojta Jina created Testacular (GitHub: vojtajina / testacular, License: MIT, npm: testacular) to write better tests for AngularJS, Google’s client-side library that’s rapidly gaining support from the wider web development community. While established projects like Selenium ar
DailyJS: ES6 for Node
In Harmony of Dreams Come True, Brendan Eich discusses the “new-in-ES6 stuff” that is starting to come to fruition. Although his discussion mostly focuses on Mozilla-based implementations, he does relate upcoming language features to a wide range of JavaScript projects, including games. This is relevant to Node developers because ECMAScript 6 is happening, and changes are already present in V8 its
DailyJS: Linking the Hash Map
The Hashmap The hash map is a classic and indispensable data structure in application programming. It is so ubiquitous that almost every modern language supports it either with a library, or by baking the functionality into the syntax itself. Hash maps are often implemented as an associative array. A hash map provides constant-time access to a value via a unique key. The most common methodology in
DailyJS: Functional Programming in JavaScript
JavaScript has two parents: Scheme and Self. We can thank Self for all of the object-orientedness of JavaScript and indeed we do in our code and our tutorials. However, Scheme played just as important a role in the language’s design, and we would do ourselves ill to overlook JavaScript’s functional heritage. What exactly does it mean for JavaScript to be functional? “Functional” merely describes a
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DailyJS: Node Roundup: wish, Vow, shell-jobs
DailyJS: Backbone.js Tutorial: Routes