[javascript] json

// JSON
// JavaScript Objec Notation

// 1. Object to JSON
// stringfy(obj)
let json = JSON.stringify(true);
console.log(json);

json = JSON.stringify(['apple', 'banana']);
console.log(json);

const rabbit = {
    name: 'tori',
    color: 'white',
    size: null,
    birthDate: new Date(),
    jump: () => {
        console.log(`${name} can jump!`);
    }
}

json = JSON.stringify(rabbit);
console.log(json);

json = JSON.stringify(rabbit, ['name', 'color']);
console.log(json);

json = JSON.stringify(rabbit, (key, value) => {
    console.log(`key: ${key}, value: ${value}`);
    return key === 'name' ? 'ellie' : value;
});
console.log(json);

// 2. JSON to Object
// parse(json)
console.clear();
json = JSON.stringify(rabbit);
const obj = JSON.parse(json, (key, value) => {
    console.log(`key: ${key}, value: ${value}`);
    return key === 'birthDate'? new Date(value): value;
});
console.log(obj);
rabbit.jump();
// obj.jump();
//  obj는 json.stringfy를 통해 직렬화되었는데 jump메소드는 직렬화에
//  포함되어 있지 않음

console.log(rabbit.birthDate.getDate());
console.log(obj.birthDate);