https://github.com/dimfeld/unique-by

https://github.com/dimfeld/unique-by

Last synced: over 1 year ago
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• Host: GitHub
• URL: https://github.com/dimfeld/unique-by
• Owner: dimfeld
• License: mit
• Created: 2021-02-02T23:16:32.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2021-02-03T02:25:24.000Z (over 5 years ago)
• Last Synced: 2025-03-11T14:27:32.336Z (over 1 year ago)
• Language: JavaScript
• Size: 6.84 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# unique-by

Filter an array of items based on a function that returns a value. The resulting array will have only one item for each value returned by the callback.

```js

import uniqueBy from '@dimfeld/unique-by';

let items = [

  { first: 'Bob', last: 'Johnson' },

  { first: 'Alice', last: 'Rama' },

  { first: 'Bob', last: 'Bobber' },

  { first: 'Xavier', last: 'Xylophone' },

  { first: 'Bob', last: 'Johnson' },

  { first: 'George', last: 'Costanza' },

  { first: 'Xavier', last: 'Xylophone' },

  { first: 'Bob', last: 'Bobber' },

  { first: 'Sally', last: 'Sappa' },

  { first: 'Alice', last: 'Rama' },

  { first: 'Sarah', last: 'Dara' },

  { first: 'Sarah', last: 'Dara' },

  { first: 'John', last: 'Bob' },

];

let filtered = uniqueBy(items, (i) => i.first + i.last);

console.dir(items);

// [

//   { first: 'Bob', last: 'Johnson' },

//   { first: 'Alice', last: 'Rama' },

//   { first: 'Bob', last: 'Bobber' },

//   { first: 'Xavier', last: 'Xylophone' },

//   { first: 'George', last: 'Costanza' },

//   { first: 'Sally', last: 'Sappa' },

//   { first: 'Sarah', last: 'Dara' },

//   { first: 'John', last: 'Bob' },

// ];

```