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Fantastic, specially liked the .find() optimization.
For someone coming from ActionScript jQuery shares lots of optimizations.
But DOM manipulation is the heavyweight here.

I was expecting a mention to the second parameter of jQuery(), the context parameter. I was under the impression it narrowed the scope of the DOM search. Is it really faster? or is .find() better.

I also have the doubt as to how does jQuery reads selectors. Is it like CSS (from right to left) or always goes for the ID first?