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
Sort array by month-year JavaScript
Suppose, we have an array that contains dates in MM-YYYY format like this −
const arr = ["1-2016", "7-2015", "7-2016", "3-2016", "8-2016", "2-2016", "6-2016", "8-2015", "5-2016", "4-2016", "9-2015", "10-2015", "11-2015", "12-2015"];
We are required to write a JavaScript function that takes in one such array and sorts it such that the dates in the array are arranged in oldest to newest order.
Example
The code for this will be −
const arr = ["1-2016", "7-2015", "7-2016", "3-2016", "8-2016", "2-2016", "6-2016", "8-2015", "5-2016", "4-2016", "9-2015", "10-2015", "11-2015", "12-2015"];
const padToString = (num) => {
return String("0" + num).slice(-2);
};
const sortByDate = (first, second) => {
const firstPart = first.split('-'), secondPart = second.split('-');
const a = firstPart[1]+padToString(firstPart[0]);
const b = secondPart[1]+padToString(secondPart[0]);
return a - b;
};
arr.sort(sortByDate);
console.log(arr);Output
And the output in the console will be −
[ '7-2015', '8-2015', '9-2015', '10-2015', '11-2015', '12-2015', '1-2016', '2-2016', '3-2016', '4-2016', '5-2016', '6-2016', '7-2016', '8-2016' ]
Updated on: 23-Nov-2020
547 Views
Advertisements