Review: Core Image for Swift: Advanced Image Processing for iOS by Simon J Gladman

Swift: UIBezierPath for inscribed and circumscribed circles (Xcode 7.2.1)

Swift: Sorting togetherness with Zip2Sequence and Stable Sort (Xcode 7.2; updated Swift 3, Xcode 8)

Swift: Array and ArraySlice (Xcode 7.3, Swift 2.2; updated Xcode 8 beta 6, Swift 3)

Swift: Giving context to CGContext (Part I)