https://github.com/hughsk/array-missing

Call a function for every element from a given array that's missing from another array
https://github.com/hughsk/array-missing

Last synced: 3 months ago
JSON representation

Call a function for every element from a given array that's missing from another array

• Host: GitHub
• URL: https://github.com/hughsk/array-missing
• Owner: hughsk
• License: other
• Created: 2014-09-25T12:49:50.000Z (almost 11 years ago)
• Default Branch: master
• Last Pushed: 2014-09-25T13:47:26.000Z (almost 11 years ago)
• Last Synced: 2025-03-15T13:36:41.734Z (4 months ago)
• Language: JavaScript
• Size: 113 KB
• Stars: 3
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

Awesome Lists containing this project

README

        
# array-missing [![unstable](http://badges.github.io/stability-badges/dist/unstable.svg)](http://github.com/badges/stability-badges)

Call a function for every element from a given array that's missing from another array

## Usage

[![NPM](https://nodei.co/npm/array-missing.png)](https://nodei.co/npm/array-missing/)

### `missing(expected, actual, [missed], [matched])`

Checks every element in the `expected` array to see if it's present somewhere in

the `actual` array.

If an element isn't found, `missed(el, index)` will be called, where `el` is the

element that's missing and `index` is its index within `expected`. Otherwise,

`matched` will be called with the same arguments.

For example:

``` javascript

var missing = require('array-missing')

missing([1, 2, 4, 8], [6, 1, 2, 5], function(el, i) {

  console.log('element:', el)

  console.log('index:', i)

})

// element: 4

// index: 2

// element: 8

// index: 3

```

## License

MIT. See [LICENSE.md](http://github.com/hughsk/array-missing/blob/master/LICENSE.md) for details.