Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript JavaScript Loops, Arrays and Objects Tracking Multiple Items with Arrays Two-Dimensional Arrays

Jackie Martin
PLUS
Jackie Martin
Courses Plus Student 6,740 Points

I'm only getting the first song and artist... What am I doing wrong?

I can only get the first song to display. This is the code on my workspace:

var playList = [
  ['I Did It My Way', 'Frank Sinatra',
  'Respect', 'Aretha Franklin',
  'Imagine', 'John Lennon',
  'Born to Run', 'Bruce Springsteen',
  'Louie Louie', 'The Kingsmen',
  'Maybellene', 'Chuck Berry']
];

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

function printSongs( songs ) {
  var listHTML = '<ol>';
  for ( var i = 0; i < songs.length; i += 1) {
    listHTML += '<li>' + songs[i][0] + ' by ' + songs[i][1] + '</li>';
  }
  listHTML += '</ol>';
  print(listHTML);
}

printSongs(playList);

3 Answers

Hello

I could not figure out the link to the challenge, but I am pretty sure the playList should look like this:

var playList = [['I Did It My Way', 'Frank Sinatra'],['Respect', 'Aretha Franklin'], ['Imagine', 'John Lennon'], ['Born to Run', 'Bruce Springsteen'], ['Louie Louie', 'The Kingsmen'], ['Maybellene', 'Chuck Berry']];

for the logic to work.

Thanks

Dave McFarland
STAFF
Dave McFarland
Treehouse Teacher

Hi Jackie,

markmneimneh is correct. You did create a two-dimensional array; however, instead of adding one array per song/singer pair, you add one array to store all of the songs and singers. You need to put each pair in its own array like this ['I Did It My Way', 'Frank Sinatra'] so your playlist should look like this:

var playList = [
  ['I Did It My Way', 'Frank Sinatra'],
  ['Respect', 'Aretha Franklin'],
  ['Imagine', 'John Lennon'],
  ['Born to Run', 'Bruce Springsteen'],
  ['Louie Louie', 'The Kingsmen'],
  ['Maybellene', 'Chuck Berry']
];
Jackie Martin
PLUS
Jackie Martin
Courses Plus Student 6,740 Points

Oh cool. Thanks for the quick response. Works great!