let student = {
    name: 'John',
    age: 30,
    isAdmin: false,
    courses: ['html', 'css', 'js'],
    spouse: null
}

let json = JSON.stringify(student);

console.log(typeof json);
console.log(json)

console.log("JSON.stringify to convert objects into JSON")
console.log(`JSON.stringfy supports following data types:
- Objects { ... }
- Arrays [ ... ]
- Primitives:
    - strings
    - numbers
    - boolean values true/false
    - null
`);

console.log(`JSON.stringfy will skip:
- Function properties (methods)
- Symbolic properties
- Properties that store undefined`);

console.log(`object.toJSON() method can be used to customize the JSON.stringfy behavior`);
let room ={
    number: 23,
toJSON(){
        return this.number;
    }
};
let meeting = {
    title: "Conference",
    room
};
console.log(JSON.stringify(meeting));

console.log("JSON.parse to convert JSON back into an object");
console.log("JSON.parse(str, [reviver]) - reviver is a function(key, value) that will be called for each (key, value) pair and can transform the value");
console.log("value is the value before transformation");
console.log("for a date, we can use the following reviver");

let user = {
    name: "John",
    age: 35
};

let userJSON = JSON.stringify(user);
console.log(userJSON);
let user2 = JSON.parse(userJSON);
console.log(user2);