Day 15 commit

Author: tbrlpld

checkpoint-7.playground/playground.xcworkspace/xcuserdata/tibor.xcuserdatad/UserInterfaceState.xcuserstate

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+import Cocoa
+
+// Your challenge is this: make a protocol that describes a building, adding various properties and methods, then create two structs, House and Office, that conform to it. Your protocol should require the following:
+//
+// A property storing how many rooms it has.
+// A property storing the cost as an integer (e.g. 500,000 for a building costing $500,000.)
+// A property storing the name of the estate agent responsible for selling the building.
+// A method for printing the sales summary of the building, describing what it is along with its other properties.
+
+
+protocol Building {
+    var numberOfRooms: Int { get }
+    var cost: Int { get set }
+    var agent: String { get set }
+    
+    func salesSummary()
+}
+
+
+struct House: Building {
+    let numberOfRooms: Int
+    var cost: Int
+    var agent: String
+    
+    func salesSummary() {
+        print("This is a house.")
+        print("It has \( self.numberOfRooms ) bedrooms.")
+        print("You can buy it from \( agent ) for $\( cost )")
+    }
+}
+
+
+struct Office: Building {
+    let numberOfRooms: Int
+    var cost: Int
+    var agent: String
+    
+    func salesSummary() {
+        print("This is an office building.")
+        print("It has an open floor plan with space for \( self.numberOfRooms ) offices.")
+        print("Contact \( agent ) for pricing details.")
+    }
+}
+
+
+
+let home = House(numberOfRooms: 3, cost: 800_000, agent: "BayView Realtors")
+home.salesSummary()
+
+print()
+
+let loft = Office(numberOfRooms: 20, cost: 8_000_000, agent: "Enterprise Sales")
+loft.salesSummary()

checkpoint-8.playground/Contents.swift

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

checkpoint-8.playground/contents.xcplayground

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+import Cocoa
+
+protocol Vehicle {
+    func estimateTime(for distance: Int) -> Int
+    func travel(distance: Int)
+}
+
+struct Car: Vehicle {
+    func estimateTime(for distance: Int) -> Int {
+        distance / 50
+    }
+
+    func travel(distance: Int) {
+        print("I'm driving \(distance)km.")
+    }
+
+    func openSunroof() {
+        print("It's a nice day!")
+    }
+}
+
+
+let twopointzero = 2.0
+let two = 2
+twopointzero == twopointzero
+two == two
+// This does not work, because of the different types.
+//two == twopointzero
+
+
+func trim(_ string: String) -> String {
+    return string.trimmingCharacters(in: .whitespacesAndNewlines)
+}
+
+extension String {
+    func trimmed() -> String {
+        return self.trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+    
+    mutating func trim() -> Void {
+        self = self.trimmed()
+    }
+}
+
+let quote = "  There is whitespace around.  "
+
+quote.trimmed()
+quote
+
+var otherQuote = " There is also whitespace here  "
+otherQuote.trim()
+otherQuote
+
+
+protocol SuperHeroMovie {
+    func writeScript() -> String
+}
+extension SuperHeroMovie {
+    func makeScript() -> String {
+        return """
+        Lots of special effects,
+        some half-baked jokes,
+        and a hint of another
+        sequel at the end.
+        """
+    }
+}

checkpoint-8.playground/playground.xcworkspace/contents.xcworkspacedata

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