jQuery.map() in 1.6

Among all of the great fixes and additions to jQuery 1.6, I’m happy to say that jQuery.map() now supports objects! The previous map only supported arrays. With other libraries already offering object support for map, it was a nice addition.

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3 Quick Steps for a Painless Upgrade to jQuery 1.3

Since the release of jQuery 1.3 a month and a half ago, I’ve been keeping my eye on any troubles that people have had with their upgrades. Fortunately, most people have had no problems at all. For those who have, the issues have almost always been in one of three areas. Identifying these areas and adjusting any legacy scripts ahead of time will go a long way toward ensuring a smooth transition to jQuery 1.3.x.

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Implementing Prototype’s Array Methods in jQuery

One of the biggest concerns I’ve heard mentioned from users of the Prototype library about jQuery is the lack of support for various array methods. The robust features Prototype provides for arrays is of great benefit to developers that do a lot of array manipulation in their JavaScript.

However, I find that after moving to jQuery, I do less array manipulation than I had done with Prototype. Perhaps jQuery has altered my development pattern so I no longer need array manipulation, or perhaps I have shifted most of my data manipulation to the server. Whatever the case, I have only on occasion missed the Prototype array methods.

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Peeling Away the jQuery Wrapper and Finding an Array

If you haven’t poked around under the hood of jQuery, you might not be aware that when you pass the jQuery function an expression or DOM element it places these elements (or, possibly a single element) into an object, and then this object is returned so that it can be chained. Without getting into the details of chaining, the fundamental concept to remember is this:

Most jQuery methods return the jQuery object itself, which allows methods to be chained.

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