finish structure

Structures.playground/Contents.swift

@@ -0,0 +1,97 @@
+import Foundation
+
+// structure is a value type
+
+struct Person {
+    let name: String
+    let age: Int
+}
+
+let foo = Person(name: "foo", age: 20)
+
+foo.name
+foo.age
+
+struct CommodorComputer {
+    let name: String
+    let manufacturer: String = "Commodor"
+    
+    // constructor
+//    init(name: String) {
+//        self.name = name
+//        self.manufacturer = "Commodor"
+//    }
+}
+
+
+let c64 = CommodorComputer(name: "Test")
+
+c64.manufacturer
+
+
+// Compute property
+struct Person2 {
+    let firstName: String
+    let lastName: String
+//    let fullName: String
+    
+//    init(firstName: String, lastName: String) {
+//        self.firstName = firstName
+//        self.lastName = lastName
+//        self.fullName = "\(firstName) \(lastName)"
+//    }
+    
+    var fullName: String {
+        "\(firstName) \(lastName)"
+    }
+}
+
+let fooBar = Person2 (firstName: "Gary", lastName: "Gan")
+
+fooBar.fullName
+
+struct Car {
+    var currentSpeed: Int
+    
+    mutating func drive(speed: Int) {
+        "Driving..."
+        currentSpeed = speed
+    }
+}
+
+let immutableCar = Car(currentSpeed: 10)
+// !immutableCar.drive(speed: 20)
+
+var mutableCar = Car(currentSpeed: 10)
+mutableCar.drive(speed: 30)
+mutableCar.currentSpeed
+
+let copy = mutableCar
+mutableCar.drive(speed: 40)
+mutableCar.currentSpeed
+copy.currentSpeed
+
+struct LivingThing {
+    init() {
+        "I'm living"
+    }
+}
+
+//struct Animal: LivingThing {
+//
+//}
+
+struct Bike {
+    let manufacturer: String
+    let currentSpeed: Int
+    
+    func copy(currentSpeed: Int) -> Bike {
+        Bike (manufacturer: self.manufacturer, currentSpeed: currentSpeed)
+    }
+}
+
+let bike1 = Bike(manufacturer: "HD", currentSpeed: 20)
+
+var bike2 = bike1.copy(currentSpeed: 40)
+bike1.currentSpeed
+bike2.currentSpeed

Structures.playground/contents.xcplayground

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='7.0' target-platform='macos' swift-version='6' buildActiveScheme='true' executeOnSourceChanges='true' importAppTypes='true'/>

swift-playground.xcworkspace/contents.xcworkspacedata

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Workspace
    version = "1.0">
+   <FileRef
+      location = "group:Structures.playground">
+   </FileRef>
    <FileRef
       location = "group:Closures.playground">
    </FileRef>