Name Validation - Special Regex Case

Name Validation

A term is either an initials or word. initials = 1 character words = 2+ characters (no dots allowed) A valid name is a name written in one of the following ways:

Rules Both initials and words must be capitalized. Initials must end with a dot. A name must be either 2 or 3 terms long. If the name is 3 words long, you can expand the first and middle name or expand the first name only. You cannot keep the first name as an initial and expand the middle name only. The last name must be a word (not an initial).

H. Wells H. G. Wells Herbert G. Wells Herbert George Wells

Herbert Wells H Wells H. G Wells h. Wells H. wells h. g. Wells H. George Wells H. G. W. Herb. G. Wells

match match match match

none none none none none none none none none none

The Solution

Level 1

This was my solution. Solved at 11:52pm Friday, May 3, 2024. After about 2 hours of trying to get the regex to do its thing.

function isValidName(name) {
    const check1 = /^(([A-Z]\.\s){1,2}[A-Z][a-z]+|[A-Z][a-z]+(\s[A-Z]\.)?\s[A-Z][a-z]+)$/;
    const check2 = /^[A-Z][a-z]+\s[A-Z][a-z]+\s[A-Z][a-z]+$/;
    
    return check1.test(name) || check2.test(name);
}
 
// Testing the function
console.log(isValidName('H. G. Wells')); // true
console.log(isValidName('H. Wells')); // true
console.log(isValidName('Herbert G. Wells')); // true
console.log(isValidName('Herbert George Wells')); // true
console.log(isValidName('Herbert')); // false
console.log(isValidName('H Wells')); // false
console.log(isValidName('H. G Wells')); // false
console.log(isValidName('Herbert G. W.')); // false

Level 2

function validName(name) {
	return /^([A-Z]\.( [A-Z]\.)?|[A-Z]\w+ [A-Z]\w+|[A-Z]\w+ [A-Z]\.)( [A-Z]\w+)$/.test(name)
}