Javascript and jQuery
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10 Javascript Resources – From Noob to Pro | Jon Raasch's Blog
Beginners should start with the Core Javascript Guide . Javascript can be a really confusing language at first and going through each of these pages will make you comfortable with Javascript’s peculiar syntax and methods. (It’s way better than w3schools.com)
The .pushStack() method has been in jQuery since before version 1.0, but it hasn’t received a whole lot of attention outside of core developers and plugin authors. While its usefulness may not be immediately apparent, it can come in really handy in some situations, so I’d like to take a quick look at what it does, how it works, and how we can use it. pushStack Basics At its most basic level, the .pushStack() method accepts an array of DOM elements and “pushes” it onto a “stack” so that later calls to methods like .end() and .andSelf() behave correctly. (Side note: As of jQuery 1.4.2, you can pass in a jQuery object instead of an array, but that isn’t documented and jQuery itself always uses an array, so that’s what we’ll stick to here.) Internally, jQuery uses .pushStack() to keep track of the previous jQuery collections as you chain traversing methods such as .parents() and .filter() .