116 lines
3.6 KiB
Markdown
116 lines
3.6 KiB
Markdown
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# default-compare [](https://www.npmjs.com/package/default-compare) [](https://npmjs.org/package/default-compare) [](https://npmjs.org/package/default-compare) [](https://travis-ci.org/doowb/default-compare) [](https://ci.appveyor.com/project/doowb/default-compare)
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> Basic sort algorithm that has similar behavior to Array.prototype.sort for null and undefined, but also allows sorting by an object property.
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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 default-compare
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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 default-compare
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```
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## Usage
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```js
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var defaultCompare = require('default-compare');
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```
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**basic array**
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```js
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var arr = ['c', 'a', undefined, 'b', 'd', null, 'e'];
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console.log(arr.sort(defaultCompare));
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//=> ['a', 'b', 'c', 'd', 'e', null, undefined]
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```
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**objects sorted by their "name" property**
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```js
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var arr = [
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{name: 'c', title: 'C'},
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{name: 'a', title: 'A'},
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{title: 'G'},
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{name: 'b', title: 'B'},
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{name: 'd', title: 'D'},
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{name: null, title: 'F'},
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{name: 'e', title: 'E'}
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];
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arr.sort(function(a, b) {
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return defaultCompare(a, b, 'name');
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});
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console.log(arr);
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//=> [
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//=> {name: 'a', title: 'A'},
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//=> {name: 'b', title: 'B'},
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//=> {name: 'c', title: 'C'},
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//=> {name: 'd', title: 'D'},
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//=> {name: 'e', title: 'E'},
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//=> {name: null, title: 'F'},
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//=> {title: 'G'}
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//=> ];
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```
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## API
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### [defaultCompare](index.js#L16)
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Basic sort algorithm that has similar behavior to `Array.prototype.sort`
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for null and undefined, but also allows sorting by an object property.
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**Params**
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* `a` **{Mixed}**: First value to compare.
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* `b` **{Mixed}**: Second value to compare.
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* `prop` **{String}**: Optional property to use when comparing objects. If specified must be a string.
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* `returns` **{Number}**: Returns 1 when `a` should come after `b`, -1 when `a` should come before `b`, and 0 when `a` and `b` are equal.
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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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Please read the [contributing guide](.github/contributing.md) for advice on opening issues, pull requests, and coding standards.
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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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**Brian Woodward**
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* [github/doowb](https://github.com/doowb)
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* [twitter/doowb](https://twitter.com/doowb)
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### License
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Copyright © 2017, [Brian Woodward](https://doowb.com).
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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 September 11, 2017._
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