23 lines
741 B
Markdown
23 lines
741 B
Markdown
---
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title: maxN
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tags: array,math,intermediate
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firstSeen: 2018-01-03T05:18:29+02:00
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lastUpdated: 2020-10-21T21:54:53+03:00
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---
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Returns the `n` maximum elements from the provided array.
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- Use `Array.prototype.sort()` combined with the spread operator (`...`) to create a shallow clone of the array and sort it in descending order.
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- Use `Array.prototype.slice()` to get the specified number of elements.
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- Omit the second argument, `n`, to get a one-element array.
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- If `n` is greater than or equal to the provided array's length, then return the original array (sorted in descending order).
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```js
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const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);
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```
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```js
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maxN([1, 2, 3]); // [3]
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maxN([1, 2, 3], 2); // [3, 2]
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```
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