UniqueStringTutorial.swift

//: Playground - noun: a place where people can play

func uniqueString(name: String, list: [String]) -> String {
    var suffix = 0
    
    func nameCheck(n: String) -> String {
        var localName = n
        guard list.contains(localName) else { return n }
        suffix += 1
        localName = name + "-\(suffix)"
        return nameCheck(n: localName)
    }
    
    return nameCheck(n: name)
}

let list = ["James", "James-1", "Kenechi", "Crystal", "Ifeoma", "Nkechi"]
let name = "James"

uniqueString(name: name, list: list)