require "queue"

local q = new queue()
q:push(1)
q:push(2)
print($"Queue contains {q:toarray():concat(", ")}")
print($"Number of elements in queue = {q:size()}")
local item = q:pop()
print($"'{item}' popped from the queue")
print($"First element is now {q:peek()}")
q:clear()
print("Queue cleared")
print($"Is queue now empty? {q:empty() ? "yes" : "no"}")