What does jquery $ actually return?

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From Rick Strahl’s description:

The jQuery Object: The Wrapped Set:
Selectors return a jQuery object known
as the “wrapped set,” which is an
array-like structure that contains all
the selected DOM elements. You can
iterate over the wrapped set like an
array or access individual elements
via the indexer ($(sel)[0] for
example). More importantly, you can
also apply jQuery functions against
all the selected elements.

About returning nothing:

Does it always return an array? Does it return null?

You always get the same thing back, whether or not it has any contents is the question. Typically you can check this by using .val() (e.g. $(‘.myElem’).val())

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