TypeScript Series: Generics and Classes

generics-classes.ts

interface HotelRooms {
  name: string;
  capacity: number;
}

class Hotel<T extends HotelRooms> {
    public rooms: T[] = []

    addRoom(room:T) {
        this.rooms.push(room)
    }

    getBigRooms(minSize: number): T[] {
        const bigRooms: T[] = []
        this.rooms.forEach(room => {
            if (room.capacity > minSize) {
                bigRooms.push(room)
            }
        })
        return bigRooms
    }
}

const hotelRooms = new Hotel()

hotelRooms.addRoom({name:'hibicus suite', capacity: 4})
hotelRooms.addRoom({name:'jacana penthouse', capacity: 6})
hotelRooms.addRoom({name:'frangipani villa', capacity: 12})
hotelRooms.addRoom({name:'daisy double', capacity: 2})

const bigRooms = hotelRooms.getBigRooms(5)

console.log(bigRooms)