Hello coders, today we are going to solve Day 7: Regular Expressions I HackerRank Solution which is a part of 10 Days of JavaScript Series.
Objective
In this challenge, we use a Regular Expression to evaluate a string.
Task
Complete the function in the editor below by returning a RegExp object, re, that matches any string s 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 s is =>3 .
- String s consists of lowercase letters only (i.e.,
[a-z]
).
Output Format
The function must return a RegExp object that matches any string s 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 – Day 7: Regular Expressions I
'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)); }
Disclaimer: The above Problem (Regular Expressions I) is generated by Hacker Rank but the Solution is Provided by CodingBroz. This tutorial is only for Educational and Learning Purpose.