regular expression || hackerrank Solution

 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

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++];   }      function regexVar() {              return new RegExp(/^([aeiou]).*\1$/);         return re;   }       function main() {     const re = regexVar();     const s = readLine();         console.log(re.test(s));   }