Write a function secondLargest(array) in JavaScript that returns the second largest value in the array (or undefined if the array doesn't have at least two elements.You must use Array#reduce do the vast majority of the work. (You may do a little pre- and post- processing outside the call to reduce.)The lambda passed to Array#reduce function has parameters in this order: partial, item. For example,secondLargest([1, 3, 2]) should return 2secondLargest([4]) should return undefinedIMPORTANT: Make sure the last line of your submission is module.export = secondLargest;

The function secondLargest(array) can be created using loop and if-else. The function takes input a array and return the second largest element of an array or if the length of the array is less than 2 it returns undefinedcode- //function bodyfunction secondLargest(arr) { //taking first element as largest var a = arr[0]; var b; //looping through each element of array for (let i = 1; i < arr.length; ++i) { if (arr[i] > a) { b = a; a = arr[i]; } else if (arr[i] > b || typeof large === 'undefined') { b = arr[i] } } return b;}console.log(secondLargest([1, 3, 2]))console.log(secondLargest([4]))module.export = secondLargest;

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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a function secondLargest(array) in JavaScript that returns the second largest value in the array (or undefined if the array doesn't have at least two elements.

You must use Array#reduce do the vast majority of the work. (You may do a little pre- and post- processing outside the call to reduce.)

The lambda passed to Array#reduce function has parameters in this order: partial, item.

For example,

secondLargest([1, 3, 2]) should return 2
secondLargest([4]) should return undefined

IMPORTANT: Make sure the last line of your submission is module.export = secondLargest;

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