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javascript/snippets/max-n.md

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+---
+title: N max elements
+type: snippet
+tags: [math]
+cover: digital-nomad-15
+dateModified: 2020-10-21T21:54:53+03:00
+---
+
+Returns the `n` maximum elements from the provided array.
+
+- Use `Array.prototype.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in descending order.
+- Use `Array.prototype.slice()` to get the specified number of elements.
+- Omit the second argument, `n`, to get a one-element array.
+- If `n` is greater than or equal to the provided array's length, then return the original array (sorted in descending order).
+
+```js
+const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
+```
+
+```js
+maxN([1, 2, 3]); // [3]
+maxN([1, 2, 3], 2); // [3, 2]
+```