A queue object, queue, is a FIFO (first-in-first-out) container type.

$queue() -> queue

Creates a new queue object.

Methods

:clear()

Removes all items from the queue.

:count() -> i64

Returns the number of items in the queue.

:dequeue() -> any

Removes and returns the next item from the queue. Returns an err if the queue is empty.

:enqueue(item: any)

Adds a new item to the queue.

:is_empty() -> bool

Returns true if the queue is empty.

:peek() -> any

Returns the next item from the queue without removing it. Returns an err if the queue is empty.