Created
October 23, 2018 18:34
-
-
Save miladvafaeifard/52a88a7f18c571a03036eb79920b8d6d to your computer and use it in GitHub Desktop.
Liskov Substitution Principal
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
abstract class Vehicle { | |
protected speed: number; | |
protected cubicCapacity: any; | |
constructor(speed: number, cubicCapacity: number){ | |
this.speed = speed; | |
this.cubicCapacity = cubicCapacity; | |
} | |
public getSpeed(): number { | |
return this.speed; | |
} | |
public getCubicCapacity(): number { | |
return this.cubicCapacity | |
} | |
public abstract speedUp(): void; | |
} | |
class Car extends Vehicle { | |
private hatchedBack: any; | |
constructor(){ | |
super(100, 10); | |
this.hatchedBack = false; | |
} | |
public isHatchBack(): boolean { | |
return this.hatchedBack | |
} | |
public speedUp(): void { | |
this.speed += 10; | |
} | |
} | |
class Bus extends Vehicle { | |
private emergencyExitLocation: string; | |
constructor(){ | |
super(60, 50); | |
this.emergencyExitLocation = 'Budapest, Hosok ter'; | |
} | |
public getEmergencyExitLocation(): string { | |
return this.emergencyExitLocation; | |
} | |
public speedUp(): void { | |
this.speed += 5; | |
} | |
} | |
const car: Vehicle = new Car(); | |
const bus: Vehicle = new Bus(); | |
console.log(`speed of car is ${car.getSpeed()}`); | |
console.log(`capacity of car is ${car.getCubicCapacity()}`); | |
car.speedUp(); | |
car.speedUp(); | |
car.speedUp(); | |
console.log(`speed of car is ${car.getSpeed()}`); | |
console.log('\n'); | |
console.log(`speed of bus is ${bus.getSpeed()}`); | |
console.log(`capacity of bus is ${bus.getCubicCapacity()}`); | |
bus.speedUp(); | |
bus.speedUp(); | |
console.log(`speed of bus is ${bus.getSpeed()}`); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment