@httpie/queue-datastructure

---

Installation

``
npm i @httpie/queue-datastructure
`

Usage

Using the queue data structure is pretty straightforward. The library exposes a Queue class and you need to create a queue instance. You can create a queue from existing data or an empty one:

`js
const Queue = require('@httpie/queue-datastructure')

// create a queue from an existing array
const queue = new Queue([ 1, 2, 3 ])

// or, create a queue from individual items
const queue = new Queue(1, 2, 3)

// or, create an empty queue
const queue = new Queue()
`

API

#### .enqueue(items)
Pushes new items to the end of the queue.

`js
queue.enqueue(1)
queue.enqueue(2, 3)
queue.enqueue([ 4, 5, 6])
`


#### .dequeue()
Removes and returns the item which is up for processing. Returns undefined if the queue is empty.

`js
queue.enqueue(1, 2, 3)
queue.size() // 3

queue.dequeue() // 1
queue.size() // 2
`


#### .peek()
Returns the front item without removing it from the queue. Returns undefined if the queue is empty.

`js
queue.enqueue(1, 2, 3)
queue.peek() // 1
`


#### .size()
Returns the number of items in the queue.

`js
queue.size() // 0
queue.enqueue(1, 2)
queue.size() // 2
`


#### .isEmpty()
Returns true if there are no items in the queue, false otherwise.

`js
queue.isEmpty() // true
queue.enqueue(1)
queue.isEmpty() // false
`


#### .isNotEmpty()
Returns true if there are items in the queue, false when the queue is empty.

`js
queue.isNotEmpty() // false
queue.enqueue(1)
queue.isNotEmpty() // true
`


#### .clear()
Removes all items from the queue.

`js
queue.clear()
queue.size() // 0
`

Contributing

1. Create a fork
2. Create your feature branch: git checkout -b my-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature`
5. Submit a pull request 🚀

License

MIT © httpie

---

> httpiejs.com  · 
> GitHub @httpiejs  · 
> Twitter @httpiejs