js-sdsl

What is js-sdsl?

The js-sdsl package is a JavaScript library that provides a variety of data structures and algorithms. It is designed to be efficient and easy to use, offering structures like vectors, lists, queues, stacks, and trees, as well as algorithms for sorting, searching, and other operations.

What are js-sdsl's main functionalities?

Vector

Vector is a dynamic array that can grow and shrink in size. It provides random access to elements, similar to an array.

const { Vector } = require('js-sdsl');
let vector = new Vector();
vector.pushBack(1);
vector.pushBack(2);
console.log(vector.size()); // Output: 2

LinkedList

LinkedList is a sequence of elements where each element points to the next. It allows for efficient insertion and removal of elements from any position.

const { LinkedList } = require('js-sdsl');
let linkedList = new LinkedList();
linkedList.pushBack(1);
linkedList.pushFront(0);
console.log(linkedList.front()); // Output: 0

Queue

Queue is a first-in-first-out (FIFO) data structure that allows for efficient addition of elements at the end and removal from the front.

const { Queue } = require('js-sdsl');
let queue = new Queue();
queue.push(1);
queue.push(2);
console.log(queue.front()); // Output: 1

Stack

Stack is a last-in-first-out (LIFO) data structure that allows for adding and removing elements from the top of the stack.

const { Stack } = require('js-sdsl');
let stack = new Stack();
stack.push(1);
stack.push(2);
console.log(stack.top()); // Output: 2

Tree

Tree structures like AVLTree are used to store data in a hierarchical manner. AVLTree is a self-balancing binary search tree.

const { AVLTree } = require('js-sdsl');
let tree = new AVLTree();
tree.insert(1);
tree.insert(2);
console.log(tree.find(1)); // Output: true

Other packages similar to js-sdsl

immutable

Immutable.js offers persistent immutable data structures. Unlike js-sdsl, which provides mutable structures, Immutable.js ensures that the data cannot be changed once created.

lodash

Lodash is a utility library that provides functions for common programming tasks, including manipulating and testing values, arrays, objects, and strings. It is more focused on utility functions than the data structure implementations provided by js-sdsl.

underscore

Underscore.js is a utility library similar to Lodash, offering a range of functions for working with JavaScript collections and arrays. It does not focus on providing data structures but offers many utilities for working with existing ones.

README

A javascript standard data structure library which benchmark against C++ STL

English | 简体中文

✨ Included data structures

• Stack - first in last out stack.
• Queue - first in first out queue.
• PriorityQueue - heap-implemented priority queue.
• Vector - protected array, cannot to operate properties like length directly.
• LinkList - linked list of non-contiguous memory addresses.
• Deque - double-ended-queue, O(1) time complexity to unshift or getting elements by index.
• OrderedSet - sorted set which implemented by red black tree.
• OrderedMap - sorted map which implemented by red black tree.
• HashSet - refer to the polyfill of ES6 Set.
• HashMap - refer to the polyfill of ES6 Map.

⚔️ Benchmark

We are benchmarking against other popular data structure libraries. In some ways we're better than the best library. See benchmark.

🖥 Supported platforms

IE / Edge	Firefox	Chrome	Safari	Opera	NodeJs
Edge 12	31	49	10	36	10

📦 Download

Download directly by cdn:

• js-sdsl.js (for development)
• js-sdsl.min.js (for production)

Or install js-sdsl using npm:

npm install js-sdsl

Or you can download the isolation packages containing only the containers you want:

package	npm	size	docs
@js-sdsl/stack			link
@js-sdsl/queue			link
@js-sdsl/priority-queue			link
@js-sdsl/vector			link
@js-sdsl/link-list			link
@js-sdsl/deque			link
@js-sdsl/ordered-set			link
@js-sdsl/ordered-map			link
@js-sdsl/hash-set			link
@js-sdsl/hash-map			link

🪒 Usage

You can visit our official website to get more information.

To help you have a better use, we also provide this API document.

For previous versions of the documentation, please visit:

https://js-sdsl.org/js-sdsl/previous/v${version}/index.html

E.g.

https://js-sdsl.org/js-sdsl/previous/v4.1.5/index.html

For browser

<script src="https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js"></script>
<script>
    const {
      Vector,
      Stack,
      Queue,
      LinkList,
      Deque,
      PriorityQueue,
      OrderedSet,
      OrderedMap,
      HashSet,
      HashMap
    } = sdsl;
    const myOrderedMap = new OrderedMap();
    myOrderedMap.setElement(1, 2);
    console.log(myOrderedMap.getElementByKey(1)); // 2
</script>

For npm

// esModule
import { OrderedMap } from 'js-sdsl';
// commonJs
const { OrderedMap } = require('js-sdsl');
const myOrderedMap = new OrderedMap();
myOrderedMap.setElement(1, 2);
console.log(myOrderedMap.getElementByKey(1)); // 2

🛠 Test

Unit test

We use karma and mocha frame to do unit tests and synchronize to coveralls. You can run yarn test:unit command to reproduce it.

For performance

We tested most of the functions for efficiency. You can go to gh-pages/performance.md to see our running results or reproduce it with yarn test:performance command.

You can also visit here to get the result.

⌨️ Development

Use Gitpod, a free online dev environment for GitHub.

Or clone locally:

$ git clone https://github.com/js-sdsl/js-sdsl.git
$ cd js-sdsl
$ npm install
$ npm run dev   # development mode

Then you can see the output in dist/cjs folder.

🤝 Contributing

Feel free to dive in! Open an issue or submit PRs. It may be helpful to read the Contributor Guide.

Contributors

Thanks goes to these wonderful people:

Takatoshi Kondo 💻 ⚠️

noname 💻

This project follows the all-contributors specification. Contributions of any kind welcome!

❤️ Sponsors and Backers

The special thanks to these sponsors or backers because they provided support at a very early stage:

Thanks also give to these sponsors or backers:

🪪 License

MIT © ZLY201

Changelog

[4.3.0] - 2023.01.20

Added

• Add public member container to Iterator which means the container that the iterator pointed to.

Changed

• Reimplement Queue, separate Queue from Deque.