Etusivu Tutki Apua
Rekisteröidy Kirjaudu sisään
lhl
/
zyAdmin
1
0
Fork 0
Tiedostot Ongelmat 0 Pull-pyynnöt 0 Wiki
Puu: 2bdf874dbb
Branchit Tagit
zyAdmin
/
node_modules
/
which-collection
lhl 2bdf874dbb create 11 kuukautta sitten
..
.github 2bdf874dbb create 11 kuukautta sitten
test 2bdf874dbb create 11 kuukautta sitten
.eslintrc 2bdf874dbb create 11 kuukautta sitten
.nycrc 2bdf874dbb create 11 kuukautta sitten
CHANGELOG.md 2bdf874dbb create 11 kuukautta sitten
LICENSE 2bdf874dbb create 11 kuukautta sitten
README.md 2bdf874dbb create 11 kuukautta sitten
index.d.ts 2bdf874dbb create 11 kuukautta sitten
index.js 2bdf874dbb create 11 kuukautta sitten
package.json 2bdf874dbb create 11 kuukautta sitten
tsconfig.json 2bdf874dbb create 11 kuukautta sitten

README.md

which-collection Version Badge

github actions coverage 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