Day 13 commit

Author: tbrlpld

checkpoint-6.playground/Contents.swift

@@ -0,0 +1,44 @@
+import Cocoa
+
+// * Create a struct to store informatoinabout a car. Include:
+//   * Model
+//   * Number of seats
+//   * Current grear
+// * Add a method to change gears up or down.
+// * What variables should be public and private.
+// * Don't allow invalid gears - 1..10 seems a fair range
+
+enum ShiftError: Error {
+    case gearTooHigh
+    case gearTooLow
+}
+
+struct Car {
+    let model: String
+    let seatCount: Int
+    static let minGear: Int = 0
+    static let maxGear: Int = 10
+    // I am using private(set) for gear, becuase the driver needs access to the current gear.
+    // But, the changing of the gear needs to go through the shift methdo.
+    private(set) var currentGear: Int = 0  // 0 is for neutral
+    
+    mutating func shift(to newGear: Int) throws {
+        if newGear < Car.minGear {
+            throw ShiftError.gearTooLow // I imagine these error sounding like trying to put a gear in without having the clutch pressed 😅
+        } else if newGear > Car.maxGear {
+            throw ShiftError.gearTooHigh
+        }
+        currentGear = newGear
+    }
+}
+
+let modelX = Car(model: "X", seatCount: 7)
+var q3 = Car(model: "Q3", seatCount: 5)
+
+print(q3.currentGear)
+try! q3.shift(to: 1)
+print(q3.currentGear)
+try! q3.shift(to: 5)
+print(q3.currentGear)
+try? q3.shift(to: 11)
+print(q3.currentGear)

checkpoint-6.playground/contents.xcplayground

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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-6.playground/playground.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>SchemeUserState</key>
+	<dict>
+		<key>day-10 (Playground).xcscheme</key>
+		<dict>
+			<key>isShown</key>
+			<false/>
+			<key>orderHint</key>
+			<integer>0</integer>
+		</dict>
+	</dict>
+</dict>
+</plist>

checkpoint-6.playground/playground.xcworkspace/xcuserdata/tibor.xcuserdatad/UserInterfaceState.xcuserstate

@@ -0,0 +1,11 @@
+import Cocoa
+
+// Looks like 0 prefixes are ignored.
+008
+
+
+
+
+
+
+

day-10.playground/playground.xcworkspace/xcuserdata/tibor.xcuserdatad/UserInterfaceState.xcuserstate

@@ -0,0 +1,4 @@
+<?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>