typed-array-length (original) (raw)

1.0.7 • Public • Published 6 months ago

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• 6 Dependencies
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typed-array-length

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

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