23 lines
666 B
Markdown
23 lines
666 B
Markdown
---
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title: haveSameContents
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tags: array,intermediate
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---
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Returns `true` if two arrays contain the same elements regardless of order, `false` otherwise.
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Use a `for...of` loop over a `Set` created from the values of both arrays.
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Use `Array.prototype.filter()` to compare the amount of occurrences of each distinct value in both arrays.
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Return `false` if the counts do not match for any element, `true` otherwise.
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```js
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const haveSameContents = (a, b) => {
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for (const v of new Set([...a, ...b]))
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if (a.filter(e => e === v).length !== b.filter(e => e === v).length) return false;
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return true;
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};
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```
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```js
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haveSameContents([1, 2, 4], [2, 4, 1]); // true
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```
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