bit-array

License: Branches, Functions, Lines, Statements:

Save memory space by using a BitArray! Behind the scene, the library stores bits within elements of a Uint8Array resulting in memory space savings.

// ~256 bits in memory + overhead
const jsArray = [1, 0, 0, 1, 1, 0, 0, 0];

// ~8 bits in memory + overhead
const bitArray = new BitArray([1, 0, 0, 1, 1, 0, 0, 0]);

• Size
• Installation
• Documentation
• Release notes

Size

2.9 KB

Installation

via npm

npm install bit-array

via yarn

yarn add bit-array

dev

npm install

yarn install

yarn start

Documentation

Usage

import BitArray from "../lib/bit-array";

const arr = new BitArray([0, 1, 0]);

arr.pushAll([1, 1, 1]);
// 0, 1, 0, 1, 1, 1

arr.push(0);
// 0, 1, 0, 1, 1, 1, 0

arr.atIndex(0);
// 0

arr.atIndexRange(0, 3);
// 0, 1, 0

console.log(arr.size)
// 7

Methods

Method	Description
pushAll(values: Array<bit>)	Pushes a an array of bits onto the array
push(value: bit)	Pushes a single bit onto the array
atIndex(index: number)	Gets the bit at a given index
atIndexRange(index: number, count?: number)	Gets count bits at a given index. If count is null, the range goes to the end of the array
set(index: number, value: bit)	Sets a specified bit at an index of the array

Properties

Property	Description
size	Gets the size of the array

Release notes

1.0.0

Initial release

• pushAll(values: Array<bit>)
• push(value: bit)
• atIndex(index: number)
• atIndexRange(index: number, count: number)
• size

1.1.0

Added method set and made count parameter optional for atIndexRange

• set(index: number, value: bit)
• atIndexRange(index: number, count?: number)

1.2.0

Added code coverage badge creation on running tests