Find String Initials separated by space.

Initials.swift

import Foundation

extension String {
    var initials: String {
        let split = self
            .split(separator: " ")
            .prefix(2)
            .compactMap { $0.first }
            .compactMap { String($0).uppercased() }
        
        let initials = split.joined(separator: "")
        return initials
    }
}