Part of XCamelize

Camelize.swift

public extension String {

   func camelize() -> String {
        
        let source = removeFirstSpaces(clean(with: " ", allOf: "-", "_", "."))
        
        if source.characters.contains(" ") {
            let first = source[self.startIndex...self.index(after: startIndex)].lowercased()
            let cammel = source.capitalized.replacingOccurrences(of: " ", with: "")
            let rest = String(cammel.characters.dropFirst())
            
            
            return "\(first.characters.first ?? self[self.startIndex])\(rest)"
        } else {
            let first = source[self.startIndex...self.index(after: startIndex)].lowercased()
            let rest = String(source.characters.dropFirst()).lowercased()
            return "\(first.characters.first ?? self[self.startIndex])\(rest)"
        }
    }
}