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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects The Build an Object Challenge, Part 1

Posted by Adam Laszlo Vincze
Adam Laszlo Vincze
4,083 Points

My build an object challenge

Hello,

Here is my code. Do you think it works?

/* Part one */
var student;
 var response = '';

  function print(message) {
  var out = document.getElementById('output');
  out.innerHTML = message;
  }

var students = [
  {
    name: 'Steve Butabi',
    track: 'Web',
    achievements: '668',
    points: '1556'
  },

    {
    name: 'Forrest Runner',
    track: 'IOS',
    achievements: '1125',
    points: '2836'
  },

    {
    name: 'Laslie Thomson',
    track: 'Graphic Design',
    achievements: '315',
    points: '553'
  },

    {
    name: 'Tom Kukac',
    track: 'Android',
    achievements: '995',
    points: '2365'
  },

    {
    name: 'Robert Nash',
    track: 'C#',
    achievements: '550',
    points: '1316'
  },

];

  /* Part two */

    for (var i = 0; i < students.length; i++) {
    var query = students[i];
    response += '<h2>Student:'+ query.name +'</h2>';
    response += '<h2>Skills:'+ query.track +'</h2>';
    response += '<h2>Achievements:'+ query.achievements +'</h2>';
    response += '<h2>Points:'+ query.points +'</h2>';
  }

print(response);
Guillaume Proulx
Guillaume Proulx
Courses Plus Student 11,949 Points

This code works for me :

I got this output in the dive with the id #output

Student:Steve Butabi Skills:Web Achievements:668 Points:1556 Student:Forrest Runner Skills:IOS Achievements:1125 Points:2836 Student:Laslie Thomson Skills:Graphic Design Achievements:315 Points:553 Student:Tom Kukac Skills:Android Achievements:995 Points:2365 Student:Robert Nash Skills:C# Achievements:550 Points:1316

If that's what you wanted, then you're good to go my friend ! You can get rid of the 'var student;' though

1 Answer

Iain Simmons
MOD
Iain Simmons
Treehouse Moderator 32,305 Points
Iain Simmons
Iain Simmons
Treehouse Moderator 32,305 Points

Yeah it works! Instead of declaring a new variable query in the loop, you might as well use student, since you declare that at the top but don't use it.

And you could have used a for..in loop to access all the properties in each object instead of hard coding the keys, but that's fine.

Here's how I did it:

var html = '';
var students = [
  {
    name: 'Iain Simmons',
    track: 'Full Stack JavaScript',
    achievements: 219,
    points: 18767
  },
  {
    name: 'Dave McFarland',
    track: 'Full Stack JavaScript',
    achievements: 197,
    points: 18375
  },
  {
    name: 'Kenneth Love',
    track: 'Learn Python',
    achievements: 38,
    points: 8504
  },
    {
    name: 'Andrew Chalkley',
    track: 'Full Stack JavaScript',
    achievements: 175,
    points: 14544
  },
  {
    name: 'Nick Pettit',
    track: 'Front End Web Development',
    achievements: 79,
    points: 6470
  }
];

function print(nodeID, message) {
  document.getElementById(nodeID).innerHTML = message;
}

function buildDefinitionList(obj) {
  var prop;
  var dListHTML = '<dl>';
  for (prop in obj) {
    dListHTML += '<dt>' + prop + '</dt>';
    dListHTML += '<dd>' + obj[prop] + '</dd>';
  }
  dListHTML += '</dl>';
  return dListHTML;
}

function buildStudentList(list) {
  var i;
  var uListHTML = '<ul>';
  for (i = 0; i < list.length; i++) {
    uListHTML += '<li>' + buildDefinitionList(list[i]) + '</li>';
  }
  uListHTML += '</ul>';
  return uListHTML;
}

html = buildStudentList(students);
print('output', html);