Object Oriented Typescript #3 - Encapsulation, and private variables

[sguitas]

This course is awesome, thanks for sharing

[kresimircosic]

It's weird, people always confuse actual setters and getters with regular methods. The proper way to write this is:

get health() {
return this.propertyHealth
}

set health(newHealth) {
this.propertyHealth = newHealth
}

[hasaniqbal]

class Player {
private _health: number;
private _speed: number;

constructor(health: number, speed: number) {
this._health = health;
this._speed = speed;
}

get health(): number {
return this._health;
}

set health(health: number) {
if (health < 0) {
console.log("Health can't be less than 0");
return
}

this._health = health;
}

get speed(): number {
return this._speed;
}

set speed(speed: number) {
this._speed = speed;
}
}

const mario = new Player(8, 10);
mario.health = -3.14; // Will throw "Health can't be less than 0"
console.log(mario.health); // Will print 8 because the setter prevented setting health to -3.14
mario.speed = 15; // Will set speed to 15
console.log(mario.speed); // Will print 15