#28 - TypeScript

Author: Sac-Corts

Roadmap/28 - SOLID LSP/typescript/Sac-Corts.ts

@@ -0,0 +1,100 @@
+// Wrong way
+class Bird {
+    fly(): void {
+        console.log('Flying!');
+    }
+}
+
+class Penguin extends Bird {
+    fly(): void {
+        throw new Error('Penguins cannot fly!');
+    }
+}
+
+function makeBirdFly(bird: Bird): void {
+    bird.fly();
+}
+
+const bird = new Bird();
+const penguin = new Penguin();
+
+makeBirdFly(bird);
+// makeBirdFly(penguin); // Not working //
+
+// Correct way
+class Bird2 {
+    eat(): void {
+        console.log('Eating...');
+    }
+}
+
+class FlyingBird extends Bird2 {
+    fly(): void {
+        console.log('Flying!');
+    }
+}
+
+class Penguin2 extends Bird2 {
+    swim(): void {
+        console.log('Swimming!');
+    }
+}
+
+function makeFlyingBirdFly(bird: FlyingBird): void {
+    bird.fly();
+}
+
+const eagle = new FlyingBird();
+const penguin2 = new Penguin2();
+
+makeFlyingBirdFly(eagle);
+// makeFlyingBirdFly(penguin2); // Not working //
+
+// ** Extra Exercise ** //
+abstract class Vehicle {
+    abstract accelerate(): void;
+    abstract brake(): void; 
+}
+
+class Car extends Vehicle {
+    accelerate(): void {
+        console.log('Car is accelerating');
+    }
+
+    brake(): void {
+        console.log('Car is braking');
+    }
+}
+
+class Motorcycle extends Vehicle {
+    accelerate(): void {
+        console.log('Motorcycle is accelerating');
+    }
+
+    brake(): void {
+        console.log('Motorcycle is braking');
+    }
+}
+
+class Bicycle extends Vehicle {
+    accelerate(): void {
+        console.log('Bicycle is accelerating');
+    }
+
+    brake(): void {
+        console.log('Bicycle is braking');
+    }
+}
+
+function testVehicle(vehicle: Vehicle): void {
+    vehicle.accelerate();
+    vehicle.brake();
+}
+
+const car = new Car();
+const motorcycle = new Motorcycle();
+const bicycle = new Bicycle();
+
+testVehicle(car);
+testVehicle(motorcycle);
+testVehicle(bicycle);