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

C H
C H
6,587 Points
Posted by C H
C H
6,587 Points

My code keeps crashing TTT and the javascript console and I can't figure out why it's not working.

I can't figure out what's wrong with my code. I got the code to run in the console when I used console.log() inside of the second function where the 'text' variable is now. I then replaced console.log() with the 'print' function, however this didn't work. This is when I tried to concatenate to an empty string variable, 'text', before calling the function. However, it's still not working for me. Please help!

  var text= ' ';

//same function as used by instructor
  function print(message) {
    var outputDiv = document.getElementById('output');
    outputDiv.innerHTML = message;
  }

//loops through array writing it to variable text
  function textList(array) {
    for (var i= -1; up= array.length; ++i<up) {
      for(var key in array[i]) {
        if (key === 'name') {
          text += '<h2>', key, ': ', array[i][key],'</h2>';
        }
        else {
          text += '<p>', key, ': ', array[i][key],'</p>';
        }
      }
    }
  }

  textList(students);
  //for testing purposes, would be replaced with: print(text);
  console.log(text);
C H
C H
6,587 Points
C H
C H
6,587 Points

Here's the fixed code for anyone curious:

  var text= '';

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

  function textList(array) {
    for (var i= -1, up= array.length; ++i<up;) {
      for(var key in array[i]) {
        if (key === 'name') {
          text += '<h2>' + key + ': ' + array[i][key] + '</h2>';
        }
        else {
          text += '<p>'+ key + ': ' + array[i][key] + '</p>';
        }
      }
    }
  }

  textList(students);
  print(text);

1 Answer

Colton Ehrman
PLUS
Colton Ehrman
Courses Plus Student 5,859 Points
Colton Ehrman
Colton Ehrman
Courses Plus Student 5,859 Points

You are using your first for loop incorrectly, the second part should be a condition statement that looks something like i < array.length... here is a sample structure for a for loop 

for (var i = 0; i < 10; i++) {
    //loop code
}

This loop will run 10 times, your code is crashing because you have an infinite/invalid loop.

C H
C H
6,587 Points
C H
C H
6,587 Points

Thank you, I now have gotten everything working with some screwing around.