객체 (Object)
객체 리터럴 (Object literal)
let apple = {
name: 'apple',
'hello-bye': '✋',
0: 1,
['hello-bye1']: '✋',
};
apple.name;
console.log(apple['hello-bye1']);
apple['name'];
apple.emoji = '🍎';
delete apple.emoji;
객체 동적 접근
const obj = {
name: '엘리',
age: 20,
};
obj.name;
obj.age;
function getValue(obj, key) {
return obj[key];
}
console.log(getValue(obj, 'name'));
function addKey(obj, key, value) {
obj[key] = value;
}
addkey(obj, 'job', 'engineer');
console.log(obj);
function deleteKey(obj, key) {
delete obj[key];
}
deleteKey(obj, 'job');
console.log(obj);
객체 축약
const x = 0;
const y = 0;
const coordinate = { x: x, y: y };
console.log(coordinate);
function makeObj(name, age) {
return {
name,
age,
};
}
객체 안의 함수
const apple = {
name: 'apple',
display: function () {
console.log(`${this.name} : 🍎`);
},
};
apple.display;
생성자 함수
const apple = {
name: 'apple',
display: function () {
console.log(`${this.name} : 🍎`);
},
};
const orange = {
name: 'orange',
display: function () {
console.log(`${this.name} : 🍊`);
},
};
function Fruit(name, emoji) {
this.name = name;
this.emoji = emoji;
this.display = () => {
console.log(`${this.name} : ${this.emoji}`);
};
return this;
}
const apple = new Fruit('apple', '🍎');
const orange = new Furit('orange', '🍊');