JavaScript: Get the n maximum elements from the provided array

JavaScript fundamental (ES6 Syntax): Exercise-87 with Solution

Get n Maximum Elements from Array

Write a JavaScript program to get the n maximum elements from the provided array. If n is greater than or equal to the provided array's length, return the original array (sorted in descending order).

• 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).

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2
// Define the function 'maxN' to find the maximum 'n' values in an array.
const maxN = (arr, n = 1) => [...arr].sort((a, b) => b - a).slice(0, n);

// Example usage:
console.log(maxN([1, 2, 3])); // Outputs: [3] (maximum value in the array)
console.log(maxN([1, 2, 3], 2)); // Outputs: [3, 2] (maximum 2 values in the array)

Output:

[3]
[3,2]

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-87-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that returns the top n maximum elements from an array sorted in descending order.
• Write a JavaScript function that extracts the n largest values from an array, or returns the entire sorted array if n exceeds the length.
• Write a JavaScript program that uses a partial sort algorithm to efficiently obtain the n highest numbers from an array.

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