Updated day 8 playground

Day 008/Day 008.playground/Contents.swift

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+/*:
+ # 100DaysOfSwiftUI
+
+ My Progress while trying to complete 100 Days Of SwiftUI Challenge by Paul Hudson - https://www.hackingwithswift.com/100/swiftui
+
+ > ## [Day 008](https://www.hackingwithswift.com/100/swiftui/8 "Day 008")
+
+ 1. [Creating your own structs](https://www.hackingwithswift.com/sixty/7/1/creating-your-own-structs "Creating your own structs")
+
+ 2. [Computed properties](https://www.hackingwithswift.com/sixty/7/2/computed-properties "Computed properties")
+
+ 3. [Property observers](https://www.hackingwithswift.com/sixty/7/3/property-observers "Property observers")
+
+ 4. [Methods](https://www.hackingwithswift.com/sixty/7/4/methods "Methods")
+
+ 5. [Mutating methods](https://www.hackingwithswift.com/sixty/7/5/mutating-methods "Mutating methods")
+
+ 6. [Properties and methods of strings](https://www.hackingwithswift.com/sixty/7/6/properties-and-methods-of-strings "Properties and methods of strings")
+
+ 7. [Properties and methods of arrays](https://www.hackingwithswift.com/sixty/7/7/properties-and-methods-of-arrays "Properties and methods of arrays")
+
+*/
+
+/*:
+ > ### 1. Creating your own structs
+*/
+
+struct Sport {
+    var name: String
+}
+
+var tennis = Sport(name: "Tennis")
+print(tennis.name)
+
+tennis.name = "Lawn tennis"
+print(tennis.name)
+
+/*:
+ > ### 2. Computed properties
+*/
+
+struct Sport1 {
+    var name: String
+    var isOlympicSport: Bool
+
+    var olympicStatus: String {
+        if isOlympicSport {
+            return "\(name) is an Olympic sport"
+        } else {
+            return "\(name) is not an Olympic sport"
+        }
+    }
+}
+
+let chessBoxing = Sport1(name: "Chessboxing", isOlympicSport: false)
+print(chessBoxing.olympicStatus)
+
+/*:
+ > ### 3. Property observers
+*/
+
+struct Progress {
+    var task: String
+    var amount: Int {
+        didSet {
+            print("\(task) is now \(amount)% complete")
+        }
+    }
+}
+
+var progress = Progress(task: "Loading data", amount: 0)
+progress.amount = 30
+progress.amount = 80
+progress.amount = 100
+
+/*:
+ > ### 4. Methods
+*/
+
+struct City {
+    var population: Int
+
+    func collectTaxes() -> Int {
+        return population * 1000
+    }
+}
+
+let london = City(population: 9_000_000)
+london.collectTaxes()
+
+/*:
+ > ### 5. Mutating methods
+*/
+
+struct Person {
+    var name: String
+
+    mutating func makeAnonymous() {
+        name = "Anonymous"
+    }
+}
+
+var person = Person(name: "Ed")
+person.makeAnonymous()
+
+/*:
+ > ### 6. Properties and methods of strings
+*/
+
+let string = "Do or do not, there is no try."
+
+print(string.count)
+print(string.hasPrefix("Do"))
+print(string.uppercased())
+print(string.sorted())
+
+/*:
+ > ### 7. Properties and methods of arrays
+*/
+
+var toys = ["Woody"]
+print(toys.count)
+toys.append("Buzz")
+toys.firstIndex(of: "Buzz")
+print(toys.sorted())
+toys.remove(at: 0)

Day 008/Day 008.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='ios'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>