2.3.67 • Published 5 months ago

@thi.ng/bitfield v2.3.67

Weekly downloads
3
License
Apache-2.0
Repository
github
Last release
5 months ago

bitfield

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This project is part of the @thi.ng/umbrella monorepo.

About

1D / 2D bit field implementations.

All implementations are backed by typed arrays. Due to Uint32Array backing the width is always rounded to a multiple of 32.

Status

STABLE - used in production

Search or submit any issues for this package

Related packages

  • @thi.ng/adjacency - Sparse & bitwise adjacency matrices and related functions for directed & undirected graphs

Installation

yarn add @thi.ng/bitfield

ES module import:

<script type="module" src="https://cdn.skypack.dev/@thi.ng/bitfield"></script>

Skypack documentation

For Node.js REPL:

# with flag only for < v16
node --experimental-repl-await

> const bitfield = await import("@thi.ng/bitfield");

Package sizes (gzipped, pre-treeshake): ESM: 1.17 KB

Dependencies

API

Generated API docs

import { BitField, BitMatrix } from "@thi.ng/bitfield";

// size always rounded up to a multiple of 32
const field = new BitField(16);

field.setAt(0);

// if 2nd arg is false, the bit will be cleared
// setAt returns non-zero value if bit was previously set
field.setAt(31, true);
// 0

// returns non-zero value if bit is set
field.at(0)
// -2147483648

field.at(1)
// 0

field.toString();
// 10000000000000000000000000000001

field.resize(64)
// 1000000000000000000000000000000100000000000000000000000000000000

const mat = new BitMatrix(8, 32);
for(let i = 0; i < 8; i++) mat.setAt(i, i);

mat.at(7, 7);
// 16777216

mat.toString();
// 10000000000000000000000000000000
// 01000000000000000000000000000000
// 00100000000000000000000000000000
// 00010000000000000000000000000000
// 00001000000000000000000000000000
// 00000100000000000000000000000000
// 00000010000000000000000000000000
// 00000001000000000000000000000000

Authors

Karsten Schmidt

If this project contributes to an academic publication, please cite it as:

@misc{thing-bitfield,
  title = "@thi.ng/bitfield",
  author = "Karsten Schmidt",
  note = "https://thi.ng/bitfield",
  year = 2016
}

License

© 2016 - 2021 Karsten Schmidt // Apache Software License 2.0

1d2darraybinarybitfielddatastructurematrixtypedarraytypescriptvector
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