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

Posted by Carlos Chang Cheng
Carlos Chang Cheng
Courses Plus Student 12,030 Points

I'm really stuck in this endless loop. Any feedback will be welcome!!!

var students = [ { name: 'Dave', track: 'Front End Development', achievements: 158, points: 14730 }, { name: 'Jody', track: 'iOS Development with Swift', achievements: '175', points: '16375' }, { name: 'Jordan', track: 'PHP Development', achievements: '55', points: '2025' }, { name: 'John', track: 'Learn WordPress', achievements: '40', points: '1950' }, { name: 'Trish', track: 'Rails Development', achievements: '5', points: '350' } ];

var message; var result="" ; var studentList=""; var search="";

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

while(true){ search = prompt('Search for a student. Type quit if you want to leave'); if (search === 'quit') { break; } for (var i = 0; i < studentList.length; i+=1) { students = studentlList[i]; if(search === students.name){ result += "<p>Student: " + students[i].name + "</p>"; result += "<p>Track: " + students[i].track + "</p>"; result += "<p>Points: " + students[i].points + "</p>"; result += "<p>Achievements: " + students[i].achievements + "</p>"; message = result; print(message); } else { print(search + ' not in the list'); break; } }

}

Zachary Kaufman
Zachary Kaufman
1,463 Points
Zachary Kaufman
Zachary Kaufman
1,463 Points

I'll look for the code real quick but for future reference when you are putting code in the treehouse community start it with three followed by the word "javascript" and end with three more :)

var students = [ 
{ name: 'Dave', track: 'Front End Development', achievements: 158, points: 14730 }, 
{ name: 'Jody', track: 'iOS Development with Swift', achievements: '175', points: '16375' }, 
{ name: 'Jordan', track: 'PHP Development', achievements: '55', points: '2025' }, 
{ name: 'John', track: 'Learn WordPress', achievements: '40', points: '1950' }, 
{ name: 'Trish', track: 'Rails Development', achievements: '5', points: '350' } ];

var message; 
var result="" ; 
var studentList=""; 
var search="";

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

while(true) { 
  search = prompt('Search for a student. Type quit if you want to leave'); 
  if (search === 'quit') { 
    break; 
  } 
  for (var i = 0; i < studentList.length; i+=1) { 
    students = studentlList[i]; 
    if(search === students.name) { 
      result += "<p>Student: " + students[i].name + "</p>"; 
      result += "<p>Track: " + students[i].track + "</p>"; 
      result += "<p>Points: " + students[i].points + "</p>"; 
      result += "<p>Achievements: " + students[i].achievements + "</p>"; message = result; print(message); 
    } else { 
      print(search + ' not in the list'); break; 
    } 
  }

}
Aman Mundra
Aman Mundra
2,755 Points
Aman Mundra
Aman Mundra
2,755 Points

The while loop does terminate when you type in 'quit'.

However, your for loop has an odd end bound - '''studentList''' is defined as a blank, empty String. As such it has a length = 0. So when you terminate your loop with '''i < studentList.length''', you are basically writing '''i < 0''', which implies the for loop never runs.