Hackerrank | 10 Days of Javascript | Day 6-Solution in JS | JavaScript-Dates-Hackerrank-Solution-in-JS

Hackerrank | 10 Days of Javascript | Day 6-Solution in JS | JavaScript-Dates-Hackerrank-Solution-in-JS

Objective

In this challenge, we learn about JavaScript Dates. Check out the attached tutorial for more details.

Task

Given a date string, , in the format MM/DD/YYYY, find and return the day name for that date. Each day name must be one of the following strings: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, or Saturday. For example, the day name for the date 12/07/2016 is Wednesday.

Input Format

Locked stub code in the editor reads the following input from stdin:
The first line contains an integer, , denoting the number of dates to check.
Each line  of the  subsequent lines contains a date in MM/DD/YYYY format; each date denotes some  that is passed to the function.

Constraints

• It is guaranteed that the input only consists of valid dates.

Output Format

The function must return a string denoting the day of the week corresponding to the date denoted by .

Sample Input 0

2
10/11/2009
11/10/2010

Sample Output 0

Sunday
Wednesday

Explanation 0

The function is called for the following  dates:

1. The date 10/11/2009 was a Sunday, so we return Sunday.
2. The date 11/10/2010 was a Wednesday, so we return Wednesday.

https://www.hackerrank.com/challenges/js10-date/problem

Day 6: JavaScript Dates Solution in JS

'use strict';

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.trim().split('\n').map(string => {
        return string.trim();
    });
    
    main();    
});

function readLine() {
    return inputString[currentLine++];
}

// The days of the week are: "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
function getDayName(dateString) {
  let dayName;
  const days = [
    "Sunday",
    "Monday",
    "Tuesday",
    "Wednesday",
    "Thursday",
    "Friday",
    "Saturday"
  ];
  dayName = days[new Date(dateString).getUTCDay()];
  return dayName;
}

function main() {
    const d = +(readLine());
    
    for (let i = 0; i < d; i++) {
        const date = readLine();
        
        console.log(getDayName(date));
    }
}