Code of TaPL Chapter 4 written in Swift.

Changing shape of UIButton to triangle is need to use UIBezierPath not frame. UIBezierPath can draw a figure with concat some points. By Configuring three points and connect it, we can writing triangle. Sample code is here. Sample code class TriangleButton: UIButton { private let bezierPath = UIBezierPath() override init(frame: CGRect) { super.init(frame: frame) setup() } required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) setup() } private func setup() { bezierPath.move(to: CGPoint(x: bounds.

We need to create multi section tableview quite often. Using Enum make it easier.

implementation of Digest Authentication with APIKit.

Easy way to get state of webiew loading using RxSwift.

Swift4 introduces Codable protocol which makes too simplify to encode and decode to JSON.

Functional data structure is slightly different from object oriented one. It have persistence and not mutated. I implement this data structure in Swift which have characteristic both object oriented and functional programming. The first example is list.