! Aware to Perl: Why does defined() return true on empty arrays and hashes?

Why does defined() return true on empty arrays and hashes?

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See defined in the 5.004 release or later of Perl.

Source: Perl FAQ: Data Manipulation
Copyright: Copyright (c) 1997 Tom Christiansen and Nathan Torkington.

(Corrections, notes, and links courtesy of RocketAware.com)

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