const person = {
    name: "Vishal",
    age: 21,
    isEducator: true,
    skills: ["C++", "JavaScript", "ReactJS"],
    projects: {
        "Frontend Freaks": "Frontend Development Project",
    },
    code: function(){
        return "start coding";
    },
    walk: () => {
        return "start walking";
    }
}

console.log(person.age); // 21

console.log(person["name"]); // Vishal

console.log(person.hasOwnProperty("name")) // true
console.log(person.hasOwnProperty("last Name")) // false

person.name = "Vivek" // Updating name key 
person.location = "New Delhi" // Adding location Key
delete person.projects // Deleting projects key
console.log(person);

const person2 = person
person2.isEducator = false;

const person3 = Object.assign({}, person)
// Nested Objects still do shallow copy here, there for we use lodash cloneDeep method(out of scope for this course)
person3.skills = null;

Object.freeze(person) // User can't add or delete or update keys
console.log(person);
console.log(Object.isFrozen(person)) // true

Object.seal(person) // User can't add or delete keys but can update the value
console.log(Object.isSealed(person)); // true

console.log(Object.keys(person)) // ["name" , "age", "isEducator", ...]
console.log(Object.values(person)) // ["Vishal", 21, true, ...]
console.log(Object.entries(person)) // [["name", "Vishal"], ["age", 21], ["isEducator", true], ...]

for (let key in person) {
    console.log(key + ":", person[key]); // name: Vishal   age: 21, isEducator: true ...
}

Object.keys(person).forEach((key) => console.log(key))

console.log(Object.is(person, person3))

const data = {
    id: 1,
    name: ["P1", "P4"],
    next: {
        id: 2,
        name: ["P3"],
        next: {
            id: 3,
            name: ["P3", "P4", "P5"],
            next: {
                id: 4,
                name: ["P1", "P2", "P4"],
                next: {
                    id: 5,
                    name: ["P2", "P3", "P5"],
                    next: null
                }
            }
        }
    }
};

const playerCount = (data) => {
    if(data === null){
        return {}
    }

    let countPlayer = {}
    for(let player of data.name){
        countPlayer[player] = (countPlayer[player] || 0) + 1;
    }
    const nextPlayerCount = playerCount(data.next);

    for(let key in nextPlayerCount){
        countPlayer[key] = (countPlayer[key] || 0) + nextPlayerCount[key]
    }
    return countPlayer;
}

const countPlayer = playerCount(data);
console.log(countPlayer) // {p1: 2, p4: 3, p3: 3, p2: 2: p5: 2}

const obj1 = {
    name: "Vishal"
}

const obj2 = {
    age: 21,
    __proto__: obj1
}

console.log(obj2.name);

let anagrams = {};
    for (let i = 0; i < strs.length; i++) {
        const str = strs[i].split("").sort().join("")
        if (!anagrams.hasOwnProperty(str)) {
            anagrams[str] = []
        }

        anagrams[str] = [...anagrams[str], strs[i]];
    }
    return Object.values(anagrams);