Convenience initializers in Swift

convenience.swift

class Letter {
    convenience init(filePath: String) {
        self.init()
        loadFromFile(filePath)
    }

    func loadFromFile(filePath: String) {
        println("loading \(filePath)")
    }
}

let letter1 = Letter()
letter1.loadFromFile("path")

let letter = Letter(filePath: "hello")