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85 lines
3.4 KiB
85 lines
3.4 KiB
# for-in [](https://www.npmjs.com/package/for-in) [](https://npmjs.org/package/for-in) [](https://npmjs.org/package/for-in) [](https://travis-ci.org/jonschlinkert/for-in) |
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> Iterate over the own and inherited enumerable properties of an object, and return an object with properties that evaluate to true from the callback. Exit early by returning `false`. JavaScript/Node.js |
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## Install |
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Install with [npm](https://www.npmjs.com/): |
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```sh |
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$ npm install --save for-in |
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``` |
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## Usage |
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```js |
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var forIn = require('for-in'); |
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var obj = {a: 'foo', b: 'bar', c: 'baz'}; |
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var values = []; |
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var keys = []; |
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forIn(obj, function (value, key, o) { |
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keys.push(key); |
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values.push(value); |
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}); |
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console.log(keys); |
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//=> ['a', 'b', 'c']; |
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console.log(values); |
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//=> ['foo', 'bar', 'baz']; |
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``` |
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## About |
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### Related projects |
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* [arr-flatten](https://www.npmjs.com/package/arr-flatten): Recursively flatten an array or arrays. This is the fastest implementation of array flatten. | [homepage](https://github.com/jonschlinkert/arr-flatten "Recursively flatten an array or arrays. This is the fastest implementation of array flatten.") |
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* [collection-map](https://www.npmjs.com/package/collection-map): Returns an array of mapped values from an array or object. | [homepage](https://github.com/jonschlinkert/collection-map "Returns an array of mapped values from an array or object.") |
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* [for-own](https://www.npmjs.com/package/for-own): Iterate over the own enumerable properties of an object, and return an object with properties… [more](https://github.com/jonschlinkert/for-own) | [homepage](https://github.com/jonschlinkert/for-own "Iterate over the own enumerable properties of an object, and return an object with properties that evaluate to true from the callback. Exit early by returning `false`. JavaScript/Node.js.") |
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### Contributing |
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Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new). |
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### Contributors |
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| **Commits** | **Contributor** | |
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| --- | --- | |
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| 16 | [jonschlinkert](https://github.com/jonschlinkert) | |
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| 2 | [paulirish](https://github.com/paulirish) | |
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### Building docs |
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_(This project's readme.md is generated by [verb](https://github.com/verbose/verb-generate-readme), please don't edit the readme directly. Any changes to the readme must be made in the [.verb.md](.verb.md) readme template.)_ |
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To generate the readme, run the following command: |
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```sh |
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$ npm install -g verbose/verb#dev verb-generate-readme && verb |
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``` |
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### Running tests |
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Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command: |
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```sh |
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$ npm install && npm test |
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``` |
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### Author |
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**Jon Schlinkert** |
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* [github/jonschlinkert](https://github.com/jonschlinkert) |
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* [twitter/jonschlinkert](https://twitter.com/jonschlinkert) |
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### License |
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Copyright © 2017, [Jon Schlinkert](https://github.com/jonschlinkert). |
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Released under the [MIT License](LICENSE). |
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*** |
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_This file was generated by [verb-generate-readme](https://github.com/verbose/verb-generate-readme), v0.4.2, on February 28, 2017._ |