Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trial
angelod
6,694 PointsWhy doesn't this work?
says something about: Uncaught TypeError: Cannot read property 'name' of undefined at students.js:13
angelod
6,694 Pointsnvm it works but not sure how to add the titles of the property beside the value of it. it just shows the value, so like for track it just stats the track value not track:
how do I add this? https://w.trhou.se/8za3xwma2y
1 Answer
Jennifer Nordell
Treehouse TeacherHi there, Angelo! Yes, you were missing your document.write() to print out the list of students, but there are two more problems here. The reason you were getting that name is not defined is that on your last iteration of the loop, you were trying to access an index outside of the array.
You wrote:
(var i = 0; i <= students.length; i+=1 )
But you meant to write:
(var i = 0; i < students.length; i+=1 )
Note the < instead of <= before students.length. If 5 students are in the array it will have a length of 5. But you are accessing the array starting at an index of 0. This means that the 5th student will be at an index of 4. On the very last iteration, you were trying to access the index of 5, which doesn't exist.
Secondly, your code will only ever print out the last student (if you added the document.write()). In the line where you add the <h2> element, you are not concatenating onto the message string, but overwriting it completely. Here, you simply missed a + sign.
You wrote:
message = "<h2>" + students[i].name + "</h2>";
But that should be:
message += "<h2>" + students[i].name + "</h2>";
Hope this helps!
angelod
6,694 Pointsty, but how do I add this "but not sure how to add the titles of the property beside the value of it. it just shows the value, so like for track it just stats the track value not track:
how do I add this? https://w.trhou.se/8za3xwma2y "
Jennifer Nordell
Treehouse TeacherAngelo Doe Personally, I think I would just put the name of the property in the HTML like so:
for (var i = 0; i < students.length; i+=1 ) {
message += "<h2>Name: " + students[i].name + "</h2>";
message += "<p>Track: " + students[i].track + "</p>";
message += "<p>Achievements: " + students[i].achievements + "</p>";
message += "<p>Points: " + students[i].points + "</p>";
};
angelod
6,694 Pointsangelod
6,694 Pointsnvm I did it write, I just added document.write(message); and it all came up. idk why it said that in console though any ideas on that?