Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Swap certain element from end and start of array - JavaScript
We are required to write a JavaScript function that accepts an array of Numbers and a number, say n (n must be less than or equal to the length of array). And our function should replace the kth element from the beginning with the nth element from the end of the array.
Example
Following is the code −
const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
const swapNth = (arr, k) => {
const { length: l } = arr;
let temp;
const ind = k-1;
temp = arr[ind];
arr[ind] = arr[l-k];
arr[l-k] = temp;
};
swapKth(arr, 4);
console.log(arr);
swapNth(arr, 8);
console.log(arr);Output
This will produce the following output in console −
[ 0, 1, 2, 6, 4, 5, 3, 7, 8, 9 ] [ 0, 1, 7, 6, 4, 5, 3, 2, 8, 9 ]
Updated on: 30-Sep-2020
151 Views
Advertisements