JavaScript Applications, Web Architecture, Viral Marketing, Social Applications « Eric Elliott

qconf 0.1.2 Released

By Eric Elliott On May 19, 2013 JavaScript | Node 0 No Comments

qconf on Github Painless configuration for Node apps with defaults file, environment variables, arguments, function parameters. defaults file < process.env < command line arguments < function call override Getting started Install qconf:

$ npm install --save qconf

1	$ npm install --save qconf

Create your config object:

var qconf = require('../qconf.js'),
  config = qconf(); // 99% of the time, this is all you need!

1 2	var qconf = require('../qconf.js'), config = qconf(); // 99% of the time, this is all you need!

Extra credit Create a JSON file: ./config/config.json

{
  "default_setting": true,
  "envOverride": false,
  "arg_override": false,
  "param_override": false
}

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{

"default_setting": true,

"envOverride": false,

"arg_override": false,

"param_override": false

}

Maybe source some environment variables:

export env_override=true

1	export env_override=true

Try a command-line…

qconf on Github Painless configuration for Node apps with defaults file, environment variables, arguments, function parameters. defaults file < process.env < command line arguments < function call override Getting started Install qconf:

$ npm install --save qconf

1	$ npm install --save qconf

Create your config object:

var qconf = require('../qconf.js'),
  config = qconf(); // 99% of the time, this is all you need!

1 2	var qconf = require('../qconf.js'), config = qconf(); // 99% of the time, this is all you need!

Extra credit Create a JSON file: ./config/config.json

{
  "default_setting": true,
  "envOverride": false,
  "arg_override": false,
  "param_override": false
}

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{

"default_setting": true,

"envOverride": false,

"arg_override": false,

"param_override": false

}

Maybe source some environment variables:

export env_override=true

1	export env_override=true

Try a command-line…

Stampit 0.3 Released

By Eric Elliott On May 19, 2013 JavaScript | Node 0 No Comments Tags: JavaScript, prototypal oo, prototypes, stampit

Right on the heels of Stampit 0.2, there’s a new release. Stampit 0.3 works with Node, Browserify, AMD, Bower, and a plain old browser global if you’re still using those. Tested with IE8+, Chrome, Firefox, Safari, and Android. Another convenient addition has landed, as well. Now you can do _.extend() style mixins just by passing…

Right on the heels of Stampit 0.2, there’s a new release. Stampit 0.3 works with Node, Browserify, AMD, Bower, and a plain old browser global if you’re still using those. Tested with IE8+, Chrome, Firefox, Safari, and Android. Another convenient addition has landed, as well. Now you can do _.extend() style mixins just by passing…

Stampit 0.2 Released

By Eric Elliott On May 16, 2013 Uncategorized 4 4 Comments

Stampit lets you create objects from reusable, composable behaviors. Instead of pretending that JavaScript is class-based, stampit embraces the power and flexibility of prototypes (see “Three Different Kinds of Prototypal OO”). It produces object factories which you can then compose to create more factories. When it’s time to instantiate your objects, just call the function…

Stampit lets you create objects from reusable, composable behaviors. Instead of pretending that JavaScript is class-based, stampit embraces the power and flexibility of prototypes (see “Three Different Kinds of Prototypal OO”). It produces object factories which you can then compose to create more factories. When it’s time to instantiate your objects, just call the function…

Getting Started With Node and Express

By Eric Elliott On May 6, 2013 JavaScript | Node 4 4 Comments Tags: express, JavaScript, node

This post is an excerpt from my new book, “Programming JavaScript Applications”. Enjoy! Node is a server-side JavaScript environment with many attractive features: A fast JavaScript engine (built on V8). Asynchronous by default philosophy (nothing should block). Event-loop design (much like the browser environment). Networking as a first class citizen (create production capable servers with…

This post is an excerpt from my new book, “Programming JavaScript Applications”. Enjoy! Node is a server-side JavaScript environment with many attractive features: A fast JavaScript engine (built on V8). Asynchronous by default philosophy (nothing should block). Event-loop design (much like the browser environment). Networking as a first class citizen (create production capable servers with…

Day Against DRM – 50% Off Programming JavaScript Applications Today Only!

By Eric Elliott On May 3, 2013 Uncategorized 0 No Comments

Buy Now! This sale is now over. Get 50% off of “Programming JavaScript Applications” and every other DRM-free E-Book from O’Reilly! Just apply the coupon code DRM2013 to your order!

Buy Now! This sale is now over. Get 50% off of “Programming JavaScript Applications” and every other DRM-free E-Book from O’Reilly! Just apply the coupon code DRM2013 to your order!

Fun With JavaScript Destructuring Assignment

By Eric Elliott On Apr 27, 2013 JavaScript 0 No Comments Tags: destructuring, destructuring assignment, ecmascript, JavaScript

By now you’ve probably heard that JavaScript is getting destructuring assignment in ECMAScript 6. It does just what it sounds like it does — it helps you extract values from structured data (such as arrays and objects). You can play with this right now. Just pop open Firefox, pull up the web console, and tinker…

By now you’ve probably heard that JavaScript is getting destructuring assignment in ECMAScript 6. It does just what it sounds like it does — it helps you extract values from structured data (such as arrays and objects). You can play with this right now. Just pop open Firefox, pull up the web console, and tinker…

h5Validate on cdnjs

By Eric Elliott On Apr 13, 2013 HTML5 | JavaScript 0 No Comments Tags: form validation, forms, html5, JavaScript, validation

h5Validate is now available for quick loading from cdnjs. h5Validate was developed in 2010 in order to bring HTML5 form validation features into the browsers. At the time, no browsers supported the features natively. Now, almost all of the browsers have native support for these features, but the native UI is clunky and awkward for…

h5Validate is now available for quick loading from cdnjs. h5Validate was developed in 2010 in order to bring HTML5 form validation features into the browsers. At the time, no browsers supported the features natively. Now, almost all of the browsers have native support for these features, but the native UI is clunky and awkward for…

You’re Optimizing the Wrong Things

By Eric Elliott On Apr 8, 2013 Uncategorized 2 2 Comments

It seems like every time somebody suggests to the JavaScript world that there’s a different (often better) way to do things than the status quo, the knee-jerk response is to say that the old way is faster, and start pulling out perf scores. That’s all well and good, but by that standard, we should all…

It seems like every time somebody suggests to the JavaScript world that there’s a different (often better) way to do things than the status quo, the knee-jerk response is to say that the old way is faster, and start pulling out perf scores. That’s all well and good, but by that standard, we should all…

Fluent JavaScript – Three Different Kinds of Prototypal OO

By Eric Elliott On Feb 11, 2013 JavaScript 25 25 Comments Tags: JavaScript, objects, oo, prototypal oo, prototypes

In order to claim fluency in JavaScript, it’s important to understand how JavaScript’s native inheritance capabilities work. This is an often neglected area of JavaScript writing and learning, but understanding it can be dramatically empowering. JavaScript is one of the most expressive programming languages ever created. In particular, its combination of delegate prototypes, runtime object…

In order to claim fluency in JavaScript, it’s important to understand how JavaScript’s native inheritance capabilities work. This is an often neglected area of JavaScript writing and learning, but understanding it can be dramatically empowering. JavaScript is one of the most expressive programming languages ever created. In particular, its combination of delegate prototypes, runtime object…

Self Invoked Anonymous Function? Sounds iffy…

By Eric Elliott On Feb 8, 2013 Uncategorized 1 1 Comment

Backbone.js Tip – Top-Down Rendering

By Eric Elliott On Feb 5, 2013 JavaScript 3 3 Comments Tags: backbone.js, JavaScript

For rendering performance reasons (avoiding reflows), it’s common to render child views before parent views (bottom-up rendering). If your app doesn’t need flash elements (i.e., fallback for audio or video), you should consider bottom-up rendering. In the exceptional case where you still need a video here or there, you can use a promise or callback…

For rendering performance reasons (avoiding reflows), it’s common to render child views before parent views (bottom-up rendering). If your app doesn’t need flash elements (i.e., fallback for audio or video), you should consider bottom-up rendering. In the exceptional case where you still need a video here or there, you can use a promise or callback…

JavaScript Constructor Functions vs Factory Functions

By Eric Elliott On Jan 5, 2013 Uncategorized 3 3 Comments

My previous blog post, Stop Using Constructor Functions in JavaScript has been a bit controversial, so I decided to break down the benefits vs drawbacks (or pros and cons if you prefer). Since everybody is already familiar with constructors, we’ll start there. If you need more information and examples about factory functions, click the link…

My previous blog post, Stop Using Constructor Functions in JavaScript has been a bit controversial, so I decided to break down the benefits vs drawbacks (or pros and cons if you prefer). Since everybody is already familiar with constructors, we’ll start there. If you need more information and examples about factory functions, click the link…

Switch … Case Considered Harmful

By Eric Elliott On Dec 11, 2012 JavaScript 7 7 Comments

Don’t Use Switch – An excerpt from “Programming JavaScript Applications” JavaScript has pretty normal control flow statements that use blocks delineated by curly braces. There is an exception to this: The switch … case statement. The strange thing about switch … case is that you must include the keyword break at the end of each…

Don’t Use Switch – An excerpt from “Programming JavaScript Applications” JavaScript has pretty normal control flow statements that use blocks delineated by curly braces. There is an exception to this: The switch … case statement. The strange thing about switch … case is that you must include the keyword break at the end of each…

How to Conduct a Better Coding Interview

By Eric Elliott On Oct 27, 2012 Uncategorized 0 No Comments

Yesterday a blog post on Geekli.st made the social media rounds. It was called “How to Crack the Toughest Coding Interviews”, by Gayle Laakmann McDowell. It was a great post, and it will probably help you get your next programming job. That said, if you’re conducting an interview like this, you’re doing it wrong. The…

Yesterday a blog post on Geekli.st made the social media rounds. It was called “How to Crack the Toughest Coding Interviews”, by Gayle Laakmann McDowell. It was a great post, and it will probably help you get your next programming job. That said, if you’re conducting an interview like this, you’re doing it wrong. The…

The Great Semicolon Debate

By Eric Elliott On Sep 19, 2012 JavaScript 2 2 Comments

“You could not step twice into the same river; for other waters are ever flowing on to you.” – Heraclitus There is a strong movement in the JavaScript community to remove as many semicolons as possible. First, this debate came with far too much drama. This Developer’s Life deals with the drama insightfully, with humor,…

“You could not step twice into the same river; for other waters are ever flowing on to you.” – Heraclitus There is a strong movement in the JavaScript community to remove as many semicolons as possible. First, this debate came with far too much drama. This Developer’s Life deals with the drama insightfully, with humor,…

qconf 0.1.2 Released

Stampit 0.3 Released

Stampit 0.2 Released

Getting Started With Node and Express

Day Against DRM – 50% Off Programming JavaScript Applications Today Only!

Fun With JavaScript Destructuring Assignment

h5Validate on cdnjs

You’re Optimizing the Wrong Things

Fluent JavaScript – Three Different Kinds of Prototypal OO

Self Invoked Anonymous Function? Sounds iffy…

Backbone.js Tip – Top-Down Rendering

JavaScript Constructor Functions vs Factory Functions

Switch … Case Considered Harmful

How to Conduct a Better Coding Interview

The Great Semicolon Debate

Fluent

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