mirror of
https://github.com/musix-org/musix-oss
synced 2024-11-14 16:00:17 +00:00
65 lines
2.6 KiB
Markdown
65 lines
2.6 KiB
Markdown
|
# which-collection <sup>[![Version Badge][2]][1]</sup>
|
||
|
|
|
||
|
|
[![Build Status][3]][4]
|
||
|
|
[![dependency status][5]][6]
|
||
|
|
[![dev dependency status][7]][8]
|
||
|
|
[![License][license-image]][license-url]
|
||
|
|
[![Downloads][downloads-image]][downloads-url]
|
||
|
|
|
||
|
|
[![npm badge][11]][1]
|
||
|
|
|
||
|
|
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
|
||
|
|
|
||
|
|
## Example
|
||
|
|
|
||
|
|
```js
|
||
|
|
var whichCollection = require('which-collection');
|
||
|
|
var assert = require('assert');
|
||
|
|
|
||
|
|
assert.equal(false, whichCollection(undefined));
|
||
|
|
assert.equal(false, whichCollection(null));
|
||
|
|
assert.equal(false, whichCollection(false));
|
||
|
|
assert.equal(false, whichCollection(true));
|
||
|
|
assert.equal(false, whichCollection([]));
|
||
|
|
assert.equal(false, whichCollection({}));
|
||
|
|
assert.equal(false, whichCollection(/a/g));
|
||
|
|
assert.equal(false, whichCollection(new RegExp('a', 'g')));
|
||
|
|
assert.equal(false, whichCollection(new Date()));
|
||
|
|
assert.equal(false, whichCollection(42));
|
||
|
|
assert.equal(false, whichCollection(NaN));
|
||
|
|
assert.equal(false, whichCollection(Infinity));
|
||
|
|
assert.equal(false, whichCollection(new Number(42)));
|
||
|
|
assert.equal(false, whichCollection(42n));
|
||
|
|
assert.equal(false, whichCollection(Object(42n)));
|
||
|
|
assert.equal(false, whichCollection('foo'));
|
||
|
|
assert.equal(false, whichCollection(Object('foo')));
|
||
|
|
assert.equal(false, whichCollection(function () {}));
|
||
|
|
assert.equal(false, whichCollection(function* () {}));
|
||
|
|
assert.equal(false, whichCollection(x => x * x));
|
||
|
|
assert.equal(false, whichCollection([]));
|
||
|
|
|
||
|
|
assert.equal('Map', whichCollection(new Map()));
|
||
|
|
assert.equal('Set', whichCollection(new Set()));
|
||
|
|
assert.equal('WeakMap', whichCollection(new WeakMap()));
|
||
|
|
assert.equal('WeakSet', whichCollection(new WeakSet()));
|
||
|
|
```
|
||
|
|
|
||
|
|
## Tests
|
||
|
|
Simply clone the repo, `npm install`, and run `npm test`
|
||
|
|
|
||
|
|
[1]: https://npmjs.org/package/which-collection
|
||
|
|
[2]: http://versionbadg.es/inspect-js/which-collection.svg
|
||
|
|
[3]: https://travis-ci.org/inspect-js/which-collection.svg
|
||
|
|
[4]: https://travis-ci.org/inspect-js/which-collection
|
||
|
|
[5]: https://david-dm.org/inspect-js/which-collection.svg
|
||
|
|
[6]: https://david-dm.org/inspect-js/which-collection
|
||
|
|
[7]: https://david-dm.org/inspect-js/which-collection/dev-status.svg
|
||
|
|
[8]: https://david-dm.org/inspect-js/which-collection#info=devDependencies
|
||
|
|
[9]: https://ci.testling.com/inspect-js/which-collection.png
|
||
|
|
[10]: https://ci.testling.com/inspect-js/which-collection
|
||
|
|
[11]: https://nodei.co/npm/which-collection.png?downloads=true&stars=true
|
||
|
|
[license-image]: http://img.shields.io/npm/l/which-collection.svg
|
||
|
|
[license-url]: LICENSE
|
||
|
|
[downloads-image]: http://img.shields.io/npm/dm/which-collection.svg
|
||
|
|
[downloads-url]: http://npm-stat.com/charts.html?package=which-collection
|