A stack implementation that allows for adding and removing elements, with optional waiting when popping elements from an empty stack.

import { assertEquals } from "https://deno.land/std@0.211.0/assert/mod.ts";
import { Stack } from "https://deno.land/x/async@v2.1.0/stack.ts";

const stack = new Stack<number>();
stack.push(1);
stack.push(2);
stack.push(3);
assertEquals(await stack.pop(), 3);
assertEquals(await stack.pop(), 2);
assertEquals(await stack.pop(), 1);