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
Finding two missing numbers that appears only once and twice respectively in JavaScript
Problem
We are required to write a JavaScript function that takes in an array in which all the numbers appear thrice except one which appears twice and one which appears only one. Our function should find and return these two numbers.
Example
Following is the code −
const arr = [1, 1, 1, 2, 2, 3];
const findMissing = (arr = []) => {
let x = 0;
let y = 0;
for(let i = 0; i < arr.length; i++){
if(arr.filter(a => a === arr[i]).length === 2){
y = arr[i];
};
if(arr.filter(b => b === arr[i]).length === 1){
x = arr[i];
};
};
return [x, y];
};
console.log(findMissing(arr));Output
Following is the console output −
[3, 2]
Updated on: 20-Apr-2021
93 Views
Advertisements