30-seconds-of-code/snippets/maxN.md

title, tags, expertise, firstSeen, lastUpdated

title	tags	expertise	firstSeen	lastUpdated
N max elements	array,math	intermediate	2018-01-03T05:18:29+02:00	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).

const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);

maxN([1, 2, 3]); // [3]
maxN([1, 2, 3], 2); // [3, 2]