DAY 7: Regular Expressions II | Hackerrank Solution | 10 Days Of Javascript

DAY 7: Regular Expressions II

Hackerrank Solution 10 Days Of  Javascript

Task

Complete the function in the editor below by returning a RegExp object, , that matches any string  satisfying both of the following conditions:

• String  starts with the prefix Mr., Mrs., Ms., Dr., or Er.
• The remainder of string  (i.e., the rest of the string after the prefix) consists of one or more upper and/or lowercase English alphabetic letters (i.e., [a-z] and [A-Z]).

Constraints

• The length of string  is  .

Output Format

The function must return a RegExp object that matches any string  satisfying both
of the given conditions.

Sample Input 0

Mr.X

Sample Output 0

true

Explanation 0

This string starts with Mr., followed by an English alphabetic letter (X).

Sample Input 1

Mrs.Y

Sample Output 1

true

Explanation 1

This string starts with Mrs., followed by an English alphabetic letter (Y).

Sample Input 2

Dr#Joseph

Sample Output 2

false

Explanation 2

This string starts with Dr# instead of Dr., so it's invalid.

Sample Input 3

Er .Abc

Sample Output 3

false

Explanation 3

This string starts with Er but there is a space before the period (.), making the string invalid.

SOLUTION

function regexVar() { let re = /^(Mr|Mrs|Ms|Dr|Er)(\.)([a-zA-Z])*$/; return re; } function main() { const re = regexVar(); const s = readLine(); console.log(!!s.match(re)); }

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