https://github.com/blixt/js-bigint

Allows working with integers of any size.
https://github.com/blixt/js-bigint

Last synced: about 1 month ago
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Allows working with integers of any size.

• Host: GitHub
• URL: https://github.com/blixt/js-bigint
• Owner: blixt
• Created: 2014-04-06T18:48:31.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-04-14T17:20:31.000Z (over 10 years ago)
• Last Synced: 2024-09-22T01:11:05.206Z (about 2 months ago)
• Language: JavaScript
• Size: 395 KB
• Stars: 19
• Watchers: 4
• Forks: 5
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
BigInt [![Build Status Image][]][Build Status]

======

Enables working with integers beyond 53 bits (the upper limit of what

JavaScript's `Number` type can accurately represent).

This is a pure JavaScript library, unlike other libraries that do the

same thing. The main benefit of being pure JavaScript is that you can

use it in a browser environment:

![Browser compatibility](https://ci.testling.com/blixt/js-bigint.png)

For Node.js-only projects, consider looking into these C extensions:

- [bignum](https://github.com/justmoon/node-bignum)

- [bigint](https://github.com/substack/node-bigint)

Example

-------

```js

> var bigint = require('bigintjs');

> bigint('99999999999999999999999999999').add('1').toString();

'100000000000000000000000000000'

> bigint('123456789012345678901234567890').multiply('98765432109876543210987654321').toString();

'12193263113702179522618503273362292333223746380111126352690'

> // Bitwise operations on a big number (JavaScript only supports up to 32 bits)

> bigint('0xFFFFFFFFFFFFFFFF').and('0xF0F0F0F0F0F0F0F0').shiftLeft(8).toString();

'4444580219171430789120'

```

This project is in an early state

---------------------------------

Some basic operations are still missing. Most notably:

- Division (and modulus), but you can use bit shifting for powers of 2

- Comparison (greater than / less than)

- Square root

Feel free to submit a pull request for any of the above.

Using this package

------------------

You can install this package with [NPM][]:

```bash

npm install --save bigintjs

```

To be able to run this in a browser, you need to use a framework that

supports CommonJS modules (for example: [Browserify][]).

[Browserify]: http://browserify.org/

[Build Status]: https://travis-ci.org/blixt/js-bigint

[Build Status Image]: https://api.travis-ci.org/blixt/js-bigint.png?branch=master

[NPM]: https://www.npmjs.org/