How to use Math.max and filter() method In Javascript

The approach combines Math.max to find the maximum element and filter to remove each found maximum from the array iteratively until `n` largest elements are obtained. This strategy efficiently retrieves the desired elements from the array.

Example: In this example This function returns the n largest elements from an array using Math.max and filter, demonstrated with an example array and n value.

JavaScript
function getNLargestElementsWithFilter(arr, n) {
    const largestElements = [];
    for (let i = 0; i < n; i++) {
        const max = Math.max(...arr);
        largestElements.push(max);
        arr = arr.filter(num => num !== max);
    }
    return largestElements;
}

const array = [1, 8, 3, 5, 9, 2];
console.log(getNLargestElementsWithFilter(array, 3)); 

Output
[ 9, 8, 5 ]

How to get n largest elements from array in JavaScript ?

Here in this article, we will see how we can find the n maximum element from the array using Javascript.

Example:

Input: arr = [1, 2, 3, 4, 5, 6], n = 3;
Output: 4, 5, 6
Explanation: Here we will see the 3 largest elements in the given array are 4, 5, 6.

Input: arr = [5, 76, 32, 98, 52, 57] n = 2;
Output: 98 , 76

There are some common ways to find the solution, and we will learn both of them one by one:

Table of Content

  • Brute Force Approach
  • Using Math.max and filter() method
  • Using Array.reduce

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Brute Force Approach

We will first make an array named largArr having a length equal to n. Then for each index of largArr, we will fill the element from the array one by one...

Using Math.max and filter() method

The approach combines Math.max to find the maximum element and filter to remove each found maximum from the array iteratively until `n` largest elements are obtained. This strategy efficiently retrieves the desired elements from the array....

Using Array.reduce

Using `Array.reduce`, iterate through the array, maintaining an accumulator array of the n largest elements. If an element is larger than any in the accumulator or the accumulator’s length is less than n, add it, then sort and slice the result....

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