23 lines
556 B
Markdown
23 lines
556 B
Markdown
---
|
|
title: pluck
|
|
tags: array,object,beginner
|
|
---
|
|
|
|
Converts and array of objects into an array of values by returning only the value of the specified key.
|
|
|
|
- Use `Array.prototype.map()` to map the array of objects.
|
|
- Use array-like notation to dynamically return the value, by key, from each object.
|
|
|
|
```js
|
|
const pluck = (arr, key) => arr.map((i) => i[key]);
|
|
```
|
|
|
|
```js
|
|
const simpsons = [
|
|
{ name: 'lisa', age: 8 },
|
|
{ name: 'homer', age: 36 },
|
|
{ name: 'marge', age: 34 },
|
|
{ name: 'bart', age: 10 },
|
|
];
|
|
pluck(simpsons, 'age'); // '[8, 36, 34, 10]'
|
|
``` |