19 lines
477 B
Markdown
19 lines
477 B
Markdown
---
|
|
title: takeRightWhile
|
|
tags: array,intermediate
|
|
---
|
|
|
|
Removes elements from the end of an array until the passed function returns `true`.
|
|
Returns the removed elements.
|
|
|
|
- Loop through the array, using `Array.prototype.reduceRight()` and accumulating elements while `func` returns falsy values.
|
|
|
|
```js
|
|
const takeRightWhile = (arr, func) =>
|
|
arr.reduceRight((acc, el) => (func(el) ? acc : [el, ...acc]), []);
|
|
```
|
|
|
|
```js
|
|
takeRightWhile([1, 2, 3, 4], n => n < 3); // [3, 4]
|
|
```
|