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87 lines
3.4 KiB
87 lines
3.4 KiB
4 years ago
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# object.map [](https://www.npmjs.com/package/object.map) [](https://npmjs.org/package/object.map) [](https://npmjs.org/package/object.map) [](https://travis-ci.org/jonschlinkert/object.map) [](https://ci.appveyor.com/project/jonschlinkert/object.map)
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> Similar to map for arrays, this creates a new object by calling the callback on each property of the original object.
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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 object.map
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```
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## Usage
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```js
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var mapValues = require('object.map');
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var result = mapValues({a: 'a', b: 'b'}, function(val, key, obj) {
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return val + val;
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});
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console.log(result);
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//=> {a: 'aa', b: 'bb'}
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```
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Optionally specify a `thisArg` as the last argument:
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```js
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var result = mapValues({a: 'b'}, function(val, key, obj) {
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return this.foo;
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}, {foo: 'bar'});
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console.log(result);
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//=> {a: 'bar'}
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```
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## About
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### Related projects
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* [arr-map](https://www.npmjs.com/package/arr-map): Faster, node.js focused alternative to JavaScript's native array map. | [homepage](https://github.com/jonschlinkert/arr-map "Faster, node.js focused alternative to JavaScript's native array map.")
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* [array-each](https://www.npmjs.com/package/array-each): Loop over each item in an array and call the given function on every element. | [homepage](https://github.com/jonschlinkert/array-each "Loop over each item in an array and call the given function on every element.")
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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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### 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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| 4 | [jonschlinkert](https://github.com/jonschlinkert) |
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| 1 | [phated](https://github.com/phated) |
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| 1 | [doowb](https://github.com/doowb) |
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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), v0.6.0, on December 20, 2017._
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