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5. Find their children.
Chaining allows for very concise code, but it also runs the risk of becoming dense and un-
This is similar to UNIX pipelining. Pipelining allows multiple applications to be
chained together with the result of one forming the input of the other. In UNIX,
the key design decision that allows this is the fact that applications return text on
standard output, and accept text on standard input. In jQuery the key design de-
cision that allows this is that functions can be called on arrays of elements, and
these functions return arrays of elements.
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