const user = {

name: 'Rasmus',

age: 29,

role: 'Teacher',

classes: ['Javascript 1', 'Javascript 3'],

hobbies: {

favourite: 'computers',

sports: 'basketball'

}

}

// output name

console.log(user.name)

console.log(user['name'])

// add lastname

user.lastname = "Jones"

user['lastname'] = "Jones"

// remove age property

delete user.role

console.log(user)

// output your favourite hobby

console.log(user.hobbies.favourite)

console.log({name:'Peter',lastname:'Pan'}.lastname)

// output your 2nd class

console.log(user.classes[1])

const user2 = {

name: 'Herman',

age: 31,

role: 'Teacher',

classes: ['Javascript 1', 'Cryptology'],

hobbies: {

favourite: 'sailing',

sports: 'baseball'

}

}

const user3 = {

name: 'Hatem',

age: 33,

role: 'Teacher',

classes: ['Javascript 1', 'LabView'],

hobbies: {

favourite: 'chess',

sports: 'cycling'

}

}

const users = [user, user2, user3]

// For loop through all the users

let sumAge = 0;

for(let i = 0; i<users.length; i++){

// add all their ages together

console.log(users[i].age)

debugger; // will stop here if run in browser with index.html

sumAge += users[i].age;

}

const avgAge = sumAge / users.length

console.log(avgAge)

// console.log("Cool stuff: ")

// console.log(users.reduce(function (sum,user){

// return sum += user.age

// }, 0 ) / users.length)

// calculate the average

// For loop through all the users

// and collect all the classes from all users

// but skip duplicates

// Hint: use a function from Array that is called includes()

let allClasses = []

for(let i=0; i < users.length; i++){

console.log(users[i].name)

// console.log(users[i].classes)

for(let j=0; j < users[i].classes.length; j++){

console.log(users[i].classes[j])

debugger; // will stop here if run in browser with index.html

if( !allClasses.includes(users[i].classes[j]) ){

allClasses.push(users[i].classes[j])

}

}

}

console.log(allClasses)