All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent| /* bling.js */ | |
| window.$ = document.querySelectorAll.bind(document); | |
| Node.prototype.on = window.on = function (name, fn) { | |
| this.addEventListener(name, fn); | |
| } | |
| NodeList.prototype.__proto__ = Array.prototype; |
(Codecs are extracted from https://web.archive.org/web/20120722124832/http://opencv.willowgarage.com/wiki/QuickTimeCodecs )
| Author unknown. | |
| 1.) Algorithm Complexity: You need to know Big-O. If you struggle with | |
| basic big-O complexity analysis, then you are almost guaranteed not to | |
| get hired. | |
| For more information on Algorithms you can visit: | |
| http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=alg_index | |
| 2.) Coding: You should know at least one programming language really | |
| well, and it should preferably be C++ or Java. C# is OK too, since |
| // convert 0..255 R,G,B values to binary string | |
| RGBToBin = function(r,g,b){ | |
| var bin = r << 16 | g << 8 | b; | |
| return (function(h){ | |
| return new Array(25-h.length).join("0")+h | |
| })(bin.toString(2)) | |
| } | |
| // convert 0..255 R,G,B values to a hexidecimal color string | |
| RGBToHex = function(r,g,b){ |
#Understanding MVC And MVP (For JavaScript & Backbone Developers)
Before exploring any JavaScript frameworks that assist in structuring applications, it can be useful to gain a basic understanding of architectural design patterns. Design patterns are proven solutions to common development problems and can suggest structural paradigms to help guide us in adding some organization to our application.
I think patterns are exciting as they're effectively a grass roots effort that build upon the collective experience of skilled developers who have previously faced similar problems as we do now. Although developers 10 or 20 years ago may not have been using the same programming languages for implementing patterns, there are many lessons we can learn from their efforts.
In this section, we're going to review two popular patterns - MVC and MVP. The context of our exploration will be how these patterns are related to the popular JavaScript framework Backbone.js, which will be explored in greater detail later on.
