[TypeScript] Polymorphism(제네릭, 인터페이스,클래스)

Polymorphism (다형성)

 : 다른 모양의 코드를 가질 수 있게 함

 

제네릭

 : placeholder 타입을 쓸 수 있돌고 해줌 

 

interface SStorage<T>{  
    [key:string]:T //property
}
class LocalStorage<T>{
    private storage :SStorage<T> = {}
    set(key:string,value:T){
      this.storage[key] = value;
    }
    remove(key:string){
        delete this.storage[key]
    }
    get(key:string):T{
        return this.storage[key]
    }
    clear(){
        this.storage = {}
    }
}

const stringStorage = new LocalStorage<string>()

stringStorage.get("key")
stringStorage.set("hello","how are you")

const booleansStorage = new LocalStorage<boolean>()


booleansStorage.get("xxx")
booleansStorage.set("xxx",true)