Solutions to foEach challenge

replaceForLoopWithforEach.js

const users = [
  { id: 1, name: 'luke', age: 67, bestFriend: 'R2', pay: '', isOldest: undefined},
  { id: 2, name: 'han', age: 76, bestFriend: 'Chewie', pay: '', isOldest: undefined},
  { id: 3, name: 'chewie', age: 74, bestFriend: 'Han', pay: '', isOldest: undefined},
  { id: 4, name: 'rey', age: 26, bestFriend: 'Finn', pay: '', isOldest: undefined},
  { id: 5, name: 'kylo', age: 35, bestFriend: 'Kylo', pay: '', isOldest: undefined},
]

// ====================1==================

// FOR LOOP 1
// pay them
// for(let i=0; i < users.length; i++) {
//   users[i].pay = 'SO MUCH MOOLAH'
// }
users.forEach((user) => {
  user.pay = 'SO MUCH MOOLAH';
});

// ====================2==================


// FOR LOOP 2
// calculate birth year
// for(let i=0; i < users.length; i++) {
//   users[i].birthyear = 2019 - users[i].age
// }
users.forEach((user)=>{user.birthyear = 2019 - user.age});

// ====================3==================

// FOR LOOP 3
// capitalize first letter of name
// for(let i=0; i < users.length; i++) {
//   users[i].name = users[i].name[0].toLocaleUpperCase() + users[i].name.slice(1)
// }

users.forEach((user)=>{
  user.name = user.name[0].toUpperCase()+user.name.slice(1)
});

// ===================4===================

// FOR LOOP 4
// mark the oldest
// var idxOfOldest = users[0];
// for(let i=0; i < users.length; i++) {
//   if(users[i].age > users[idxOfOldest].age)
//     idxOfOldest = i;
// }
// users[idxOfOldest].isOldest = true;

var idxOfOldest = users[0];

users.forEach((user)=>{
  if(idxOfOldest.age < user.age)
    idxOfOldest = user;
});
idxOfOldest.isOldest = true;

// ===================5===================

  // let html = "";
  // FOR LOOP 5
  // for(let i=0; i < users.length; i++) {
  //   html += "<div>"+ (i+1) + '. ' + users[i].name + ', ' + users[i].age + 'yrs old';
  //   if(users[i].isOldest)
  //     html += ' OLDEST'
  //   html += '</div>';
  // }

  let html = "";
  users.forEach((user)=>{
    html += "<div>"+ (user.id+0) + '. ' + user.name + ', ' + user.age + 'yrs old,' +  ' Best friend is '+user.bestFriend;
    if (user.isOldest)
    html += ' OLDEST'
    html += '</div>';
  });

const appDiv = document.getElementById('app');
appDiv.innerHTML = html;