---
url: /docs/guide/usage/linter/rules/unicorn/prefer-array-find.md
---

### What it does

Encourages using `Array.prototype.find` and `Array.prototype.findLast` instead of
taking the first or last matching element from `filter(...)`.

### Why is this bad?

Using `filter(...)[0]` or array destructuring to get the first match is less
efficient and more verbose than using `find(...)`. `find` and `findLast`
short-circuit when a match is found, whereas `filter` evaluates the entire array.

### Examples

Examples of **incorrect** code for this rule:

```js
const match = users.filter((u) => u.id === id)[0];
const match = users.filter(fn).shift();
const [match] = users.filter(fn);

const match = users.filter(fn).at(-1);
const match = users.filter(fn).pop();
```

Examples of **correct** code for this rule:

```js
const match = users.find((u) => u.id === id);
const match = users.find(fn);

const match = users.findLast(fn);
```

## How to use

## Version

This rule was added in v0.16.12.

## References