finish classes

Classes.playground/Contents.swift

@@ -0,0 +1,122 @@
+import Foundation
+
+class Person {
+    var name: String
+    var age: Int
+    
+    init(name: String, age: Int) {
+        self.name = name
+        self.age = age
+    }
+    
+    func increaseAge() {
+        self.age += 1
+    }
+}
+
+let foo = Person(name: "Foo", age: 20)
+
+foo.age
+foo.increaseAge()
+foo.age
+
+let bar = foo
+bar.increaseAge()
+bar.age
+foo.age
+
+
+if foo === bar {
+    "Foo and Bar point to the same memory"
+} else {
+    "Foo and Bar don't point to the same memory"
+}
+
+class Vehicle {
+    func goVroom() {
+        "Vroom Vroom"
+    }
+}
+
+class Car: Vehicle {
+    
+}
+
+let car = Car()
+car.goVroom()
+
+
+class Person2 {
+    private(set) var age: Int
+    init(age: Int) {
+        self.age = age
+    }
+    
+    func increaseAge() {
+        self.age += 1
+    }
+}
+
+let baz = Person2(age: 20)
+baz.increaseAge()
+baz.age
+//baz.age += 1
+
+
+class Tesla {
+    let manufacturer = "Tesla"
+    let model: String
+    let year: Int
+    
+    init() {
+        self.model = "X"
+        self.year = 2025
+    }
+    
+    init(model: String, year: Int) {
+        self.model = model
+        self.year = year
+    }
+    
+    convenience init(
+        model: String
+    ) {
+        self.init(
+            model: model,
+            year: 2024
+        )
+    }
+}
+
+class TeslaModelY: Tesla {
+    override init() {
+        super.init(model: "Y", year: 2024)
+    }
+}
+
+
+let modelY = TeslaModelY()
+modelY.model
+modelY.year
+
+class MyClass {
+    init() {
+        "Intialized"
+    }
+    
+    func doSomething() {
+        "Do Something"
+    }
+    
+    deinit {
+        "Deinitialized"
+    }
+}
+
+let myClass = MyClass()
+let myClosure = {
+    let myClass = MyClass()
+    myClass.doSomething()
+}
+
+myClosure()

Classes.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:Classes.playground">
+   </FileRef>
    <FileRef
       location = "group:Enumerations.playground">
    </FileRef>