> For the complete documentation index, see [llms.txt](https://bryan-guner.gitbook.io/my-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bryan-guner.gitbook.io/my-docs/redux/repos/examples/real-world/node_modules/deep-is.md).

# deep-is

## deep-is

Node's `assert.deepEqual() algorithm` as a standalone module. Exactly like [deep-equal](https://github.com/substack/node-deep-equal) except for the fact that `deepEqual(NaN, NaN) === true`.

This module is around [5 times faster](https://gist.github.com/2790507) than wrapping `assert.deepEqual()` in a `try/catch`.

[![browser support](http://ci.testling.com/thlorenz/deep-is.png)](http://ci.testling.com/thlorenz/deep-is)

[![build status](https://secure.travis-ci.org/thlorenz/deep-is.png)](http://travis-ci.org/thlorenz/deep-is)

## example

```js
var equal = require('deep-is');
console.dir([
    equal(
        { a : [ 2, 3 ], b : [ 4 ] },
        { a : [ 2, 3 ], b : [ 4 ] }
    ),
    equal(
        { x : 5, y : [6] },
        { x : 5, y : 6 }
    )
]);
```

## methods

var deepIs = require('deep-is')

### deepIs(a, b)

Compare objects `a` and `b`, returning whether they are equal according to a recursive equality algorithm.

## install

With [npm](http://npmjs.org) do:

```
npm install deep-is
```

## test

With [npm](http://npmjs.org) do:

```
npm test
```

## license

Copyright (c) 2012, 2013 Thorsten Lorenz <thlorenz@gmx.de> Copyright (c) 2012 James Halliday <mail@substack.net>

Derived largely from node's assert module, which has the copyright statement:

Copyright (c) 2009 Thomas Robinson <280north.com>

Released under the MIT license, see LICENSE for details.