19 lines
408 B
Markdown
19 lines
408 B
Markdown
---
|
|
title: sample
|
|
tags: array,random,beginner
|
|
---
|
|
|
|
Returns a random element from an array.
|
|
|
|
- Use `Math.random()` to generate a random number.
|
|
- Multiply it by `Array.prototype.length` and round it off to the nearest whole number using `Math.floor()`.
|
|
- This method also works with strings.
|
|
|
|
```js
|
|
const sample = arr => arr[Math.floor(Math.random() * arr.length)];
|
|
```
|
|
|
|
```js
|
|
sample([3, 7, 9, 11]); // 9
|
|
```
|