push - Perldoc Browser

#push ARRAY,LIST

Treats ARRAY as a stack, and pushes the values of LIST onto the end of ARRAY. The length of ARRAY increases by the length of LIST. Has the same effect as

for $value (LIST) {
 $ARRAY[++$#ARRAY] = $value;
}

but is more efficient. Returns the number of elements in the array following the completed push.

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