04 Push And Pop

# Source URL: https://dev.epicgames.com/documentation/en-us/fortnite/stacks-and-queues-in-verse
# Local doc:  epic-docs/documentation/en-us/fortnite/stacks-and-queues-in-verse.md
# Section:    Push and Pop
# Adds NewElement to the top of the stack by returning a new
# stack with NewElement as the top
Push<public>(NewElement:t):stack(t)=
stack(t){Elements := Elements + array{NewElement}}
# Removes the element on top of the stack and returns a tuple of both a new
# stack with the top element removed and the removed element.
Pop<public>()<decides><transacts>:tuple(stack(t),t)=
FirstElement := Peek[]
(stack(t){Elements := Elements.RemoveElement[Elements.Length - 1]}, FirstElement)