(push! deq ..args)
  deq: a deque
  args: zero or more arguments (any type)
  returns #n
F

Appends one or more elements to the end of a deque.

(let ar (arr 1 2 3))
(push! ar 4 5)
(ensure (eq? ar '(1 2 3 4 5)))
arr-from-elem
push-start!