http://www.perlmonks.org?node_id=206

pop

See the current Perl documentation for pop.

Here is our local, out-dated (pre-5.6) version:

pop - remove the last element from an array and return it

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pop ARRAY

pop

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Pops and returns the last value of the array, shortening the array by 1. Has a similar effect to

    $tmp = $ARRAY[$#ARRAY--];

If there are no elements in the array, returns the undefined value. If ARRAY is omitted, pops the @ARGV array in the main program, and the @_ array in subroutines, just like shift().

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