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