---
title: Check if arrays have same contents
type: snippet
language: javascript
tags: [array]
author: chalarangelo
cover: interior-15
dateModified: 2020-10-19T22:49:51+03:00
---

Checks if two arrays contain the same elements regardless of order.

- Use a `for...of` loop over a `Set` created from the values of both arrays.
- Use `Array.prototype.filter()` to compare the amount of occurrences of each distinct value in both arrays.
- Return `false` if the counts do not match for any element, `true` otherwise.

```js
const haveSameContents = (a, b) => {
  for (const v of new Set([...a, ...b]))
    if (a.filter(e => e === v).length !== b.filter(e => e === v).length)
      return false;
  return true;
};
```

```js
haveSameContents([1, 2, 4], [2, 4, 1]); // true
```