65 lines
2.7 KiB
Plaintext
65 lines
2.7 KiB
Plaintext
# typed-array-length <sup>[![Version Badge][2]][1]</sup>
|
|
|
|
[![dependency status][5]][6]
|
|
[![dev dependency status][7]][8]
|
|
[![License][license-image]][license-url]
|
|
[![Downloads][downloads-image]][downloads-url]
|
|
|
|
[![npm badge][11]][1]
|
|
|
|
Robustly get the length of a Typed Array, or `false` if it is not a Typed Array. Works cross-realm, in every engine, even if the `length` property is overridden.
|
|
|
|
## Example
|
|
|
|
```js
|
|
var typedArrayLength = require('typed-array-length');
|
|
var assert = require('assert');
|
|
|
|
assert.equal(false, typedArrayLength(undefined));
|
|
assert.equal(false, typedArrayLength(null));
|
|
assert.equal(false, typedArrayLength(false));
|
|
assert.equal(false, typedArrayLength(true));
|
|
assert.equal(false, typedArrayLength([]));
|
|
assert.equal(false, typedArrayLength({}));
|
|
assert.equal(false, typedArrayLength(/a/g));
|
|
assert.equal(false, typedArrayLength(new RegExp('a', 'g')));
|
|
assert.equal(false, typedArrayLength(new Date()));
|
|
assert.equal(false, typedArrayLength(42));
|
|
assert.equal(false, typedArrayLength(NaN));
|
|
assert.equal(false, typedArrayLength(Infinity));
|
|
assert.equal(false, typedArrayLength(new Number(42)));
|
|
assert.equal(false, typedArrayLength('foo'));
|
|
assert.equal(false, typedArrayLength(Object('foo')));
|
|
assert.equal(false, typedArrayLength(function () {}));
|
|
assert.equal(false, typedArrayLength(function* () {}));
|
|
assert.equal(false, typedArrayLength(x => x * x));
|
|
assert.equal(false, typedArrayLength([]));
|
|
|
|
assert.equal(1, typedArrayLength(new Int8Array(1)));
|
|
assert.equal(2, typedArrayLength(new Uint8Array(2)));
|
|
assert.equal(3, typedArrayLength(new Uint8ClampedArray(3)));
|
|
assert.equal(4, typedArrayLength(new Int16Array(4)));
|
|
assert.equal(5, typedArrayLength(new Uint16Array(5)));
|
|
assert.equal(6, typedArrayLength(new Int32Array(6)));
|
|
assert.equal(7, typedArrayLength(new Uint32Array(7)));
|
|
assert.equal(8, typedArrayLength(new Float32Array(8)));
|
|
assert.equal(9, typedArrayLength(new Float64Array(9)));
|
|
assert.equal(10, typedArrayLength(new BigInt64Array(10)));
|
|
assert.equal(11, typedArrayLength(new BigUint64Array(11)));
|
|
```
|
|
|
|
## Tests
|
|
Simply clone the repo, `npm install`, and run `npm test`
|
|
|
|
[1]: https://npmjs.org/package/typed-array-length
|
|
[2]: https://versionbadg.es/inspect-js/typed-array-length.svg
|
|
[5]: https://david-dm.org/inspect-js/typed-array-length.svg
|
|
[6]: https://david-dm.org/inspect-js/typed-array-length
|
|
[7]: https://david-dm.org/inspect-js/typed-array-length/dev-status.svg
|
|
[8]: https://david-dm.org/inspect-js/typed-array-length#info=devDependencies
|
|
[11]: https://nodei.co/npm/typed-array-length.png?downloads=true&stars=true
|
|
[license-image]: http://img.shields.io/npm/l/typed-array-length.svg
|
|
[license-url]: LICENSE
|
|
[downloads-image]: http://img.shields.io/npm/dm/typed-array-length.svg
|
|
[downloads-url]: http://npm-stat.com/charts.html?package=typed-array-length
|