2.13 stack-queue

package: rktsicm

This module provides a simple stack-queue. It is used internally by the ambigous operator. As a data structure, it is not recomended.

procedure
(make-stack&queue) → stack&queue?

Creates a new empty stack&queue.

procedure
(stack&queue? obj) → boolean?
obj : any/c

Check if on object is a stack&queue?.

procedure
(stack&queue-empty? sq) → boolean?
sq : stack&queue?

Check if sq is an empty stack&queue?.

procedure
(push! sq val) → void
  sq : stack&queue?
  val : any/c
procedure
(add-to-end! sq val) → void
  sq : stack&queue?
  val : any/c

Adds val to the front or end of the stack&queue?.

procedure
(pop! sq) → any/c
sq : stack&queue?

Get the first element of the stack&queue?, leaving the stack&queue? that element shorter.