cwchristerw/musix-oss
1
0
Fork 0
mirror of https://github.com/musix-org/musix-oss synced 2024-11-12 23:20:17 +00:00
Code
75ce4f42bc
musix-oss/node_modules/which-collection
History
MatteZ02 30022c7634 Modules
2020-03-03 22:30:50 +02:00
..
.github Modules 2020-03-03 22:30:50 +02:00
test Modules 2020-03-03 22:30:50 +02:00
.eslintrc Modules 2020-03-03 22:30:50 +02:00
.travis.yml Modules 2020-03-03 22:30:50 +02:00
CHANGELOG.md Modules 2020-03-03 22:30:50 +02:00
index.js Modules 2020-03-03 22:30:50 +02:00
LICENSE Modules 2020-03-03 22:30:50 +02:00
package.json Modules 2020-03-03 22:30:50 +02:00
README.md Modules 2020-03-03 22:30:50 +02:00

README.md

which-collection Version Badge

Build Status dependency status dev dependency status License Downloads

npm badge

Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without instanceof, and despite Symbol.toStringTag.

Example

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