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SxsnPC
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which-collection
htc 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
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.github 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
test 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
.eslintrc 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
.nycrc 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
CHANGELOG.md 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
LICENSE 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
README.md 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
index.d.ts 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
index.js 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
package.json 7ca38fdcbb 善行少年PC端首次提交(基础版) 2 هفته پیش
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README.md

which-collection Version Badge

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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