Day 6: JavaScript Dates :- 10 Days of Javascript HackerRank Solution

Problem:-

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.

Solution:-

'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;

var days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];

var d = new Date(dateString);

dayName = days[d.getDay()];

return dayName;

}

function main() {

const d = +(readLine());

for (let i = 0; i < d; i++) {

const date = readLine();

console.log(getDayName(date));

}

}