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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects The Build an Object Challenge, Part 2

Posted by luckeday
luckeday
6,123 Points

What is 'undefined' in my code?

Here is my code for the Build an Object Challenge, Part 2:

function print(message) {
  document.write(message);
}

function profile(name, track, points, achv) {
  print('Student: ' + name + '<br>');
  print('<ol>Track: ' + track + '<br>');
  print('Points: ' + points + '<br>');
  print('Achievements: ' + achv + '</ol>');
}

var students = [
  { name: 'John', track: 'iOS', achievements: '30', points: '344' },
  { name: 'Shaun', track: 'Web Design', achievements: '20', points: '145'},
  { name: 'Martha', track: 'FED', achievements: '13', points: '453'},
  { name: 'Alice', track: 'Android', achievements: '35', points: '390' },
  { name: 'Stewart', track: 'CSS', achievements: '11', points: '470' }
];

for (var prop in students) { 
  print(profile
 (students[prop].name, 
  students[prop].track, 
  students[prop].points, 
  students[prop].achievements)
 );
  }

Just before 'Student:' it comes up as undefined? What is causing this? I cannot find it for the life of me. Thank you.

2 Answers

Shawn Anderton
Shawn Anderton
24,124 Points
Shawn Anderton
Shawn Anderton
24,124 Points

You don't need to use the print function in for loop. Your are already using it in the profile function. to print the data.

rydavim
rydavim
18,813 Points
rydavim
rydavim
18,813 Points

You don't need to call the print function when you call profile, because profile already prints the information.

for (var prop in students) { 
  print(profile // Don't use print here, just call the profile function.
 (students[prop].name, 
  students[prop].track, 
  students[prop].points, 
  students[prop].achievements)
 );
  }