The Queue JavaScript Data Structure

The Queue JavaScript Data Structure

A Queue is Linear Data Structure where data elements are arranged sequentially in an array. Stacks and Queues are similar, but Queues use the process of FIFO (First In, First Out). To achieve this, the push and shift Javascript methods are used to create a Queue class in Javascript.

Queues are similar to stacks, except the insertion point is different from the removal point.

We add at one end of the queue, and we remove from the other end.

This time, we call it First In, First Out (FIFO).

Like any queue you can think of, for example at the restaurant, disco or when you’re waiting to enter into a concert hall.

Here is a possible implementation of a queue in JavaScript using private class fields, using an array as the internal storage:

class Queue {
  #items = []
  enqueue = (item) => this.#items.splice(0, 0, item)
  dequeue = () => this.#items.pop()
  isempty = () => this.#items.length === 0
  empty = () => (this.#items.length = 0)
  size = () => this.#items.length
}

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