Algorithm
Hacker rank Problem Name: 10 Days of JavaScript -
Hacker rank Problem Link: https://www.hackerrank.com/challenges/js10-regexp-1/problem?isFullScreen=true
Day 7:
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, 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
beginning with and ending in the same vowel.
Sample Input 0
bcdSample Output 0
falseExplanation 0
This string starts with (and ends in) a consonant, so it cannot start and end with the same vowel.
Sample Input 1
abcdSample Output 1
falseExplanation 1
This string ends in a consonant, so it cannot start and end with the same vowel.
Sample Input 2
abcdaSample Output 2
trueExplanation 2
This string starts and ends with the same vowel (
a).Sample Input 3
abcdoSample Output 3
falseThis string starts with the vowelExplanation 3
abut ends in the vowelo
Code Examples
#1 Code Example with Javascript Programming
Code -
Javascript Programming
'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 vowels=['a','e','i','o','u']
//var re = RegExp(/^([aeiou]).*\1$/);
var re = RegExp(/^([aeiou]).*\1$/);
/*
* Do not remove the return statement
*/
return re;
}
Input
Output