Treats ARRAY as a stack by appending the values of LIST to the end of ARRAY. The length of ARRAY increases by the length of LIST. Has the same effect as
for my $value (LIST) { $ARRAY[++$#ARRAY] = $value;}but is more efficient. Returns the number of elements in the array following the completedpush.
Starting with Perl 5.14, an experimental feature allowedpush to take a scalar expression. This experiment has been deemed unsuccessful, and was removed as of Perl 5.24.
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