Swift toKebabCase String Extension

ToKebabCase.swift

//
//  ToKebabCase.swift
//
//  This Swift String extension removes punctuation, replaces spaces with dashes, and lowercases the string.
//
//  Usage:
//  
//  let uglyString = "This, my friends, is an ugly string, full of punctuation. Yuck."
//  let prettyString = uglyString.toKebabCase()
//  
//  print(prettyString) // returns this-my-friends-is-an-ugly-string-full-of-punctuation-yuck
//
//  Copyright © 2019 Seth Lilly. But you can use it because I <3 you.
//

extension String {
    func toKebabCase() -> String {
        return self.replacingOccurrences(
            of: #"[^\w\s]"#,
            with: "",
            options: .regularExpression
        ).replacingOccurrences(
            of: #"[\s]"#,
            with: "-",
            options: .regularExpression
        ).lowercased()
    }
}