[operation] remove first element [common name(s)] pop [Ada] Delete_First [C++] pop_front [Java] pollFirst [Perl] shift [Python] popleft [Ruby] shift [JavaScript] shift [PHP] 
array_shift
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