Hackerrank | 10 Days of Javascript | Day 7-Solution in JS | Regular-Expressions-I-hackerrank-Solution-in-JS

Hackerrank | 10 Days of Javascript | Day 7-Solution in JS | Regular-Expressions-I-hackerrank-Solution-in-JS

Objective

In this challenge, we use a Regular Expression to evaluate a string. Check out the attached tutorial for more details.

Task

Complete the function in the editor below by returning a RegExp object, , that matches any string  that begins and ends with the same vowel. Recall that the English vowels are a, e, i, o, and u.

Constraints

• The length of string  is  .
• String  consists of lowercase letters only (i.e., [a-z]).

Output Format

The function must return a RegExp object that matches any string  beginning with and ending in the same vowel.

Sample Input 0

bcd

Sample Output 0

false

Explanation 0

This string starts with (and ends in) a consonant, so it cannot start and end with the same vowel.

Sample Input 1

abcd

Sample Output 1

false

Explanation 1

This string ends in a consonant, so it cannot start and end with the same vowel.

Sample Input 2

abcda

Sample Output 2

true

Explanation 2

This string starts and ends with the same vowel (a).

Sample Input 3

abcdo

Sample Output 3

false

Explanation 3

This string starts with the vowel a but ends in the vowel o.

https://www.hackerrank.com/challenges/js10-let-and-const/problem

Day 7: Regular Expressions I 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++];
}

function regexVar() {
    /*
     * Declare a RegExp object variable named 're'
     * It must match a string that starts and ends with the same vowel(i.e.,{a,e,i,o,u})
     */
    var re = RegExp(/^([aeiou]).*\1$/);
    /*
     * Do not remove the return statement
     */
    return re;
}


function main() {
    const re = regexVar();
    const s = readLine();
    
    console.log(re.test(s));
}