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95 lines
3.1 KiB
95 lines
3.1 KiB
2 years ago
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# object.reduce [](https://www.npmjs.com/package/object.reduce) [](https://npmjs.org/package/object.reduce) [](https://travis-ci.org/jonschlinkert/object.reduce)
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> Reduces an object to a value that is the accumulated result of running each property in the object through a callback.
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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.reduce
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```
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Install with [yarn](https://yarnpkg.com):
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```sh
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$ yarn add object.reduce
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```
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Install with [bower](https://bower.io/)
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```sh
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$ bower install object.reduce --save
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```
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## Usage
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the initial value (or value from the previous callback call), the `value` of the current property, the `key` of the current property, and the `object` over which the function is iterating. Node.js/JavaScript utility.)_
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**Params**
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* `object` **{Object}**: The object to iterate over (the iteratee)
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* `fn` **{Function}**: The function invoked per iteration.
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* `init` **{Object}**: The initial value to use for the accumulator.
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* `thisArg` **{Object}**: (optional) Object to use as the invocation context for the iterator (expose as `this` inside the iterator)
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Executes the given callback `fn` once for each own enumerable property in the object. The callback receives the following arguments:
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* `acc`: the initial value (or value from the previous callback call),
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* `value`: the of the current property,
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* `key`: the of the current property, and
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* the original `object` over which the function is iterating.
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**Example**
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```js
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var reduce = require('object.reduce');
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var a = {a: 'foo', b: 'bar', c: 'baz'};
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reduce(a, function(acc, value, key, obj) {
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acc[key] = value.toUpperCase();
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return acc;
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}, {});
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//=> {a: 'FOO', b: 'BAR', c: 'BAZ'};
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```
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## About
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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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### 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), v0.5.0, on April 17, 2017._
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