class Shape {
  constructor(color) {
    this.color = color;
  }

  area() {
    throw new Error("area() must be implemented by subclass");
  }

  toString() {
    return `${this.constructor.name}(area=${this.area().toFixed(2)}, color=${this.color})`;
  }
}

class Circle extends Shape {
  constructor(radius, color) {
    super(color);
    this.radius = radius;
  }

  area() {
    return Math.PI * this.radius ** 2;
  }
}

class Rectangle extends Shape {
  constructor(width, height, color) {
    super(color);
    this.width = width;
    this.height = height;
  }

  area() {
    return this.width * this.height;
  }
}

const shapes = [
  new Circle(5, "red"),
  new Rectangle(4, 6, "blue"),
];

// Polymorphism - אותו method, התנהגות שונה
shapes.forEach(s => console.log(s.toString()));
// Circle(area=78.54, color=red)
// Rectangle(area=24.00, color=blue)

const totalArea = shapes.reduce((sum, s) => sum + s.area(), 0);
Classes ו-OOP — Prototype, Inheritance, this

Classes ו-OOP — Prototype, Inheritance, this
