25 lines
804 B
Markdown
25 lines
804 B
Markdown
---
|
|
title: pull
|
|
tags: array,intermediate
|
|
---
|
|
|
|
Mutates the original array to filter out the values specified.
|
|
|
|
Use `Array.prototype.filter()` and `Array.prototype.includes()` to pull out the values that are not needed.
|
|
Use `Array.prototype.length = 0` to mutate the passed in an array by resetting it's length to zero and `Array.prototype.push()` to re-populate it with only the pulled values.
|
|
|
|
_(For a snippet that does not mutate the original array see [`without`](#without))_
|
|
|
|
```js
|
|
const pull = (arr, ...args) => {
|
|
let argState = Array.isArray(args[0]) ? args[0] : args;
|
|
let pulled = arr.filter((v, i) => !argState.includes(v));
|
|
arr.length = 0;
|
|
pulled.forEach(v => arr.push(v));
|
|
};
|
|
```
|
|
|
|
```js
|
|
let myArray = ['a', 'b', 'c', 'a', 'b', 'c'];
|
|
pull(myArray, 'a', 'c'); // myArray = [ 'b', 'b' ]
|
|
``` |