null created by bouyagas - https://repl.it/KHbM/5

KHbM-5.js

var youDontNeedToWorryAboutAnythingInHere = function() {
    var NameArray = ['Noel Plain', 'Steffanie Plain', 'Hester Sanderfur', 'Retta Plain', 'Idella Saur','Shila Plain', "Marybeth Peavler", "Chadwick Jin", "Jerold Chauez", "Roselle Plain", "Doria Figgins", "Seth Arvizu", 'Gloria Wyche', "Melodi Plain", "Robin Shackleford", "Jack Plain", "Marina Prost", "Melvina Plain", "Ryan Plemons", "Janis Ohare", "Assata Shakur", "Kanye West", "Jay-Z", "Mariah Carey", "Bianca Gandolfo", "Cedric the Entertainer", "Chloe Plain"];
    var JobArray = ['Mortician', 'Broadcaster', 'Craftsperson', 'Engineer', 'Interior designer', 'Nun'];
    var CityArray = ["Scottsdale, Arizona", "Oakland, California", "Stockton, California", "New York, NY"];
    var emptyNetwork = [];

    function createNetwork(collection){

        for (var i = 0; i < NameArray.length; i++) {
            var randomJob = JobArray[Math.floor(Math.random() * JobArray.length)];
            var randomCity = CityArray[Math.floor(Math.random() * CityArray.length)];

            collection.push(createNewUser(NameArray[i], randomJob, randomCity));
        }

        return collection
    }

    return createNetwork(emptyNetwork);

}

function createNewUser(username, job, city){
    var newUser = {
        username: username,
        job: job,
        city: city,
        friends: [],
        family: [],
        coworkers: [],
    };

    return newUser;

}
// creating the user you're going to be adding to
var joeyProfile = createNewUser('Joey Plain', 'Engineer', 'Oakland, California');
// creating the network collection you're going to be pulling

var allUsers = youDontNeedToWorryAboutAnythingInHere();
// check the console to see what these look like
// console.dir(allUsers);

// console.dir(ourUser);
//console.dir(userNetwork);

// YOUR CODE HERE

//original version, with floops

// for (var i = 0; i < allUsers.length; i++) {
//   var user = allUsers[i];
//   var lastName = user.username.split(' ')[1];
//   if (user.city === joeyProfile.city) {
//     joeyProfile.friends.push(user.username);
//   }
//   if (user.job === joeyProfile.job) {
//     joeyProfile.coworkers.push(user.username);
//   }
//   if (lastName === joeyProfile.username.split(' ')[1]) {
//     joeyProfile.family.push(user.username);
//   }
// }

//populate friends (no family)
//populate coworkers (no friends or family)
//populate family



//myObj.hasOwnProperty('banana'); //-> true or false
//myArr.indexOf(value); //-> -1 if it is not there, orsomething between 0  and myArr.length - 1 if it is
//myArr.includes(value); //-> true or false



//loop through family array
//if a family member is in friends array, remove it from friends array
// for (var i = 0; i < joeyProfile.family.length; i++) {
//   var familyMember = joeyProfile.family[i];
//   for (var j = 0; j < joeyProfile.friends.length; j++) {
//     if (familyMember === joeyProfile.friends[j]) {
//       joeyProfile.friends.splice(j, 1);
//       j--;
//     }
//   }
// }

// for (var i = 0; i < joeyProfile.friends.length; i++) {
//   var friend = joeyProfile.friends[i];
//   for (var j = 0; j < joeyProfile.coworkers.length; j++) {
//     var coworker = joeyProfile.coworkers[j];
//     if (coworker === friend) {
//       joeyProfile.coworkers.splice(j, 1);
//       j--; /*is the same as j = j - 1; */
//     }
//   }
// }
//[1, 2, 3]
//i is 1
//(the array).splice(i, 1)
//[1, 3]
//i--;

//refactor with HOFs
joeyProfile.family = allUsers.filter(function(user) {
  var lastname = user.username.split(' ')[1];
  return lastname === 'Plain'; 
}).map(function(user) {
  return user.username;
});

joeyProfile.friends = allUsers.filter(function(user) {
  return user.city === joeyProfile.city;
}).map(function(user) {
  return user.username;
}).filter(function(friend) {
  return joeyProfile.family.indexOf(friend) === -1;
});

joeyProfile.coworkers = allUsers.filter(function(user) {
  return user.job === joeyProfile.job;
}).map(function(user) {
  return user.username;
}).filter(function(coworker) {
  var isNotFamily = joeyProfile.family.indexOf(coworker) === -1;
  var isNotFriend = joeyProfile.friends.indexOf(coworker) === -1;
  return isNotFamily && isNotFriend;
});

//check results
console.dir(joeyProfile);