sensordb2 e64a8defe5 3.17		1 年之前
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test	e64a8defe5 3.17	1 年之前
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CHANGELOG.md	e64a8defe5 3.17	1 年之前
LICENSE	e64a8defe5 3.17	1 年之前
README.md	e64a8defe5 3.17	1 年之前
index.js	e64a8defe5 3.17	1 年之前
package.json	e64a8defe5 3.17	1 年之前

is-negative-zero

Is this value negative zero? === will lie to you.

Example

var isNegativeZero = require('is-negative-zero');
var assert = require('assert');

assert.notOk(isNegativeZero(undefined));
assert.notOk(isNegativeZero(null));
assert.notOk(isNegativeZero(false));
assert.notOk(isNegativeZero(true));
assert.notOk(isNegativeZero(0));
assert.notOk(isNegativeZero(42));
assert.notOk(isNegativeZero(Infinity));
assert.notOk(isNegativeZero(-Infinity));
assert.notOk(isNegativeZero(NaN));
assert.notOk(isNegativeZero('foo'));
assert.notOk(isNegativeZero(function () {}));
assert.notOk(isNegativeZero([]));
assert.notOk(isNegativeZero({}));

assert.ok(isNegativeZero(-0));

Tests

Simply clone the repo, npm install, and run npm test

README.md

is-negative-zero

Example

Tests