TypeScript_8:Class_2

▶ Practice_Dictionary

type Words = {
	[key:string]: string
    // 할당받는 것의 type(이름)도 string, 할당받는 값도 string이라는 syntax
    // property의 이름은 모르지만 type만 알 경우, 유용하게 사용되어짐! Important!
}

class Word {
	constructor(
    	public term:string,
        public def:string
     ){}
     
     //def add Method
     add(addWord:string){
     	this.def=this.def.concat('',addWord);
     }
     //def update Method
     update(newDef:string){
     	this.def=newDef;
     }
     //def print Method
     print(){
     	console.log(this.def)
     }
}

class Dict {
	private words:Words
    constructor(){
    	this.words= {}
    }    
    
    //추가 Method
    add(word:Word){
    	// 추가하려는 word가 존재하지 않을 경우!	
    	if(this.words[word.term]===undefined){
        	this.words[word.term]=word.def;
        }
     }     
     
     //word update Method
     update(word:Word) {
		if (this.words[word.term] !== undefined) {
			this.words[word.term] = word.def;
		}
     }
     
     //word 삭제 Method
     del(term:string){
     	return delete this.words[term]
     }
     
     //word_def 출력 Method
     def(term:string){
     	return this.words[term]
     }
}



const kimchi = new Word("kimchi","Korean T Food");
const dict = new Dict()
dict.add(kimchi)
dict.def("kimchi")