properties – IT Nursery

Error in Swift class: Property not initialized at super.init call

May 24, 2022 by IT Nursery

I have two classes, Shape and Square class Shape { var numberOfSides = 0 var name: String init(name:String) { self.name = name } func simpleDescription() -> String { return “A shape with \(numberOfSides) sides.” } } class Square: Shape { var sideLength: Double init(sideLength:Double, name:String) { super.init(name:name) // Error here self.sideLength = sideLength numberOfSides = … Read more

Property initialization using “by lazy” vs. “lateinit”

May 6, 2022 by IT Nursery

In Kotlin, if you don’t want to initialize a class property inside the constructor or in the top of the class body, you have basically these two options (from the language reference): Lazy Initialization lazy() is a function that takes a lambda and returns an instance of Lazy<T> which can serve as a delegate for … Read more