[operation] insert element at front [common name(s)] push, cons [Ada] Prepend [C++] push_front [Java] offerFirst [Perl] unshift [Python] appendleft [Ruby] unshift [JavaScript] unshift [PHP] 
array_unshift
a r r a y _ p u s h
a r r a y _ u n s h i f t
a r r a y _ p o p
a r r a y _ s h i f t
e n d
r e s e t