GitHub - inspect-js/is-negative-zero: Is this value negative zero? === will lie to you. (original) (raw)

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