pop
pop - remove the last element from an array and return it
pop ARRAY
Pops and returns the last value of the array, shortening the array by
1. Has a similar effect to
<![CDATA[
$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()
.