Day 7: Regular Expressions I in JavaScript | 10 Days Of JavaScript Solutions | HackerRank Programming Solutions [💯Correct]

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In this post, you will find the solution for Day 7: Regular Expressions I in JavaScript-HackerRank Problem. We are providing the correct and tested solutions of coding problems present on HackerRank. If you are not able to solve any problem, then you can take help from our Blog/website.

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Introduction To JavaScript

JavaScript is a lightweight, cross-platform, and interpreted scripting language. It is well-known for the development of web pages, many non-browser environments also use it. JavaScript can be used for Client-side developments as well as Server-side developments. JavaScript contains a standard library of objects, like Array, Date, and Math, and a core set of language elements like operators, control structures, and statements.

Advantages of JavaScript

The merits of using JavaScript are −

  • Less server interaction − You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.
  • Immediate feedback to the visitors − They don’t have to wait for a page reload to see if they have forgotten to enter something.
  • Increased interactivity − You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.
  • Richer interfaces − You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors.

Link for the ProblemDay 7: Regular Expressions I – Hacker Rank Solution

Day 7: Regular Expressions I – Hacker Rank Solution

Problem:

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 aeio, 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.

Day 7: Regular Expressions I – Hacker Rank Solution
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})
  let re = /^([aeiou]).+\1$/;
  return re;
}

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