Queues

Python

There are 2 queues in Python:

• queue.Queue: intended for allowing different threads to communicate using queued messages/data
• collections.deque: intended as a data structure.

from collections import deque
q = deque()
q.append(1)
q.appendleft(0)
q.pop()
q.popleft()

Java

Queue<Object> queue = new LinkedList<>();

Summary of Queue methods

• Throws exception: add(e), remove(), element()
• Returns special: offer(e), poll(), peek()

Go

There's no built-in queues in Go, but we can use a channel:

c := make(chan int, 300)

//Push
c <- value

//Pop
x <- c