FunPlayGround I upgraded them to Xcode 10 on swift 5 and seperated into iOS and MacOS platform Data Structure and Algorithms Anagrams LinkedList TripleSum SherlockString Image Processing NSImage Resized by GraphicContext and NSBitmapImageRep Unit Test the resize function created in Swift-macOS-image-resize.playground. Easily get the measure report to show that the #2 draw method is faster than #1 -- very useful test feature ! JSON Decoder A simple example of decoding the format of contents.json for the AppIcon of Assets.xcassets