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add model solution
Commit Description:
add model solution
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node_modules/object-is/README.md
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| r789 | #object-is <sup>[![Version Badge][2]][1]</sup> | |||
| [![Build Status][3]][4] | ||||
| [![dependency status][5]][6] | ||||
| [![dev dependency status][7]][8] | ||||
| [![License][license-image]][license-url] | ||||
| [![Downloads][downloads-image]][downloads-url] | ||||
| [![npm badge][11]][1] | ||||
| ES2015-compliant shim for Object.is - differentiates between -0 and +0, and can compare to NaN. | ||||
| Essentially, Object.is returns the same value as === - but true for NaN, and false for -0 and +0. | ||||
| ## Example | ||||
| ```js | ||||
| Object.is = require('object-is'); | ||||
| var assert = require('assert'); | ||||
| assert.ok(Object.is()); | ||||
| assert.ok(Object.is(undefined)); | ||||
| assert.ok(Object.is(undefined, undefined)); | ||||
| assert.ok(Object.is(null, null)); | ||||
| assert.ok(Object.is(true, true)); | ||||
| assert.ok(Object.is(false, false)); | ||||
| assert.ok(Object.is('foo', 'foo')); | ||||
| var arr = [1, 2]; | ||||
| assert.ok(Object.is(arr, arr)); | ||||
| assert.notOk(Object.is(arr, [1, 2])); | ||||
| assert.ok(Object.is(0, 0)); | ||||
| assert.ok(Object.is(-0, -0)); | ||||
| assert.notOk(Object.is(0, -0)); | ||||
| assert.ok(Object.is(NaN, NaN)); | ||||
| assert.ok(Object.is(Infinity, Infinity)); | ||||
| assert.ok(Object.is(-Infinity, -Infinity)); | ||||
| ``` | ||||
| ## Tests | ||||
| Simply clone the repo, `npm install`, and run `npm test` | ||||
| [1]: https://npmjs.org/package/object-is | ||||
| [2]: http://versionbadg.es/es-shims/object-is.svg | ||||
| [3]: https://travis-ci.org/es-shims/object-is.svg | ||||
| [4]: https://travis-ci.org/es-shims/object-is | ||||
| [5]: https://david-dm.org/es-shims/object-is.svg | ||||
| [6]: https://david-dm.org/es-shims/object-is | ||||
| [7]: https://david-dm.org/es-shims/object-is/dev-status.svg | ||||
| [8]: https://david-dm.org/es-shims/object-is#info=devDependencies | ||||
| [11]: https://nodei.co/npm/object-is.png?downloads=true&stars=true | ||||
| [license-image]: http://img.shields.io/npm/l/object-is.svg | ||||
| [license-url]: LICENSE | ||||
| [downloads-image]: http://img.shields.io/npm/dm/object-is.svg | ||||
| [downloads-url]: http://npm-stat.com/charts.html?package=object-is | ||||