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Erreur de chargement de la page - Vimperator. Programming's Dirtiest Little Secret. This is another one I've wanted to write forever.

Programming's Dirtiest Little Secret

Man, I've tried a bunch of times. No ruck. Not Rucky. Once again I'm stuck feeling so strongly about something that I'm tripping over myself trying to get my point across. So! Once upon a time..., uh, let's see... it was about 1982. Once upon a time in '82, there was this completely hypothetical fictitious made-up dorky 12-year-old kid named Yeev Staigey, who was enduring his sophomore year at Paradise High School in Paradise, California. The Anti-IF Campaign. The Photoshop Etiquette Manifesto for Web Designers. Signs of a poorly written jQuery plugin. So far with every single workshop I’ve given, both for advanced JavaScript and jQuery for Designers, this question (or some variation thereof) has come up: How do you know if the plugin is good to use?

Signs of a poorly written jQuery plugin

It’s always dependant on the problem they’re trying to solve, but in lieu of a better jQuery plugin ranking system, here’s a couple of tips that should raise a red flag. Consider the following: $.fn.myplugin = function () { var me = $(this).each(function() { return $(this).bind('someEvent', function () { // does something }); }); return me;}; Although the code may be perfect once some event has run, most times you don’t have time to read through all the code carefully and you need to make a decision so you can move on to the actual problem you’re trying to solve. A Plugin Development Pattern. I've been developing jQuery plugins for quite a while now, and I've become rather comfortable with a particular style of plugin development for my scripts.

A Plugin Development Pattern

This article is meant to share the pattern that I've found especially useful for plugin authoring. Essential JavaScript Design Patterns For Beginners. I would like to thank Rebecca Murphey for inspiring me to open-source this mini-book and release it for free download and distribution - making knowledge both open and easily available is something we should all strive for where possible. I would also like to extend my thanks to the very talented Alex Sexton who was kind enough to be the technical reviewer for this publication. I hope that it helps you learn more about design patterns and the usefulness of their application to JavaScript. Volume 2 of Essential JavaScript Design Patterns is currently being written and will be more detailed than this first edition.

The ETA for it's online release is late Q4, 2011. For more detailed coverage of specific patterns, you may be interested in my posts on the Pub/Sub (Observer) or Decorator patterns. At the beginning of this book I will be focusing on a discussion about the importance and history of design patterns in any programming language. Patterns are not an exact solution. V.8 ... et pourquoi pas ? © 2009 - Webdesigner/Intégratrice xHTML-CSS-JS. The Essentials of Writing High Quality JavaScript. Twice a month, we revisit some of our readers’ favorite posts from throughout the history of Nettuts+.

The Essentials of Writing High Quality JavaScript

This tutorial was first published in October, 2010. The brilliant Stoyan Stefanov, in promotion of his book, "JavaScript Patterns," was kind enough to contribute an excerpt of the book for our readers, which details the essentials of writing high quality JavaScript, such as avoiding globals, using single var declarations, pre-caching length in loops, following coding conventions, and more. This excerpt also includes some habits not necessarily related to the code itself, but more about the overall code creation process, including writing API documentation, conducting peer reviews, and running JSLint. These habits and best practices can help you write better, more understandable, and maintainable code—code to be proud of (and be able to figure out) when revisiting it months and years down the road. Writing Maintainable Code Software bugs are costly to fix. Minimizing Globals. Chapter 4 The amazing em unit and other best practices.

This chapter is about writing style sheets with style.

Chapter 4 The amazing em unit and other best practices

By showing you case studies and how they are constructed, we hope to give you a sense of how CSS can be used to encode the visual presentation you want to achieve. Also, more importantly, if you follow the guidelines in this chapter your documents will behave well on a wide range of web devices. For example, they will scale gracefully from one screen size to another. Use ems to make scalable style sheets The foremost tool for writing scalable style sheets is the "em" unit, and it therefore goes on top of the list of guidelines that we will compile throughout this chapter: use ems to make scalable style sheets. The meaning of "em" has changed over the years. In CSS, the em unit is a general unit for measuring lenghts, for example page margins and padding around elements.

JavaScript Garden. Function Declarations and Expressions Functions in JavaScript are first class objects.

JavaScript Garden

That means they can be passed around like any other value. One common use of this feature is to pass an anonymous function as a callback to another, possibly an asynchronous function. The function Declaration function foo() {} The above function gets hoisted before the execution of the program starts; thus, it is available everywhere in the scope it was defined, even if called before the actual definition in the source. JavaScript Guide - MDC Doc Center. Dive Into Python. Style Guide for Python Code. Table of Contents. Duck typing. When I see a bird that walks like a duck and swims like a duck and quacks like a duck, I call that bird a duck.[1] In duck typing, a programmer is only concerned with ensuring that objects behave as demanded of them in a given context, rather than ensuring that they are of a specific type.

Duck typing

For example, in a non-duck-typed language, one would create a function that requires that the object passed into it be of type Duck, in order to ensure that that function can then use the object's walk and quack methods. In a duck-typed language, the function would take an object of any type and simply call its walk and quack methods, producing a run-time error if they are not defined. Instead of specifying types formally, duck typing practices rely on documentation, clear code, and testing to ensure correct use.

Concept examples[edit]