Javascript Foreach Function Expected

Question

I am using a function which takes a callback paramater to which im passing my own function. I'm however getting the error function expected

GpsGate.Server.MyService.getTracksByUser(groupName, user.username, getTracksByUser_callback());

function getTracksByUser_callback(result)
{
  var responseData = '<response>';
  result.tracks.foreach( //error on this line
    function addTrack(track) {
      responseData += '<track>';
       //ommited
      responseData += '</track>';
     }
  );
  responseData += '</response>';
  response.body = responseData;
}

looking at examples http://msdn.microsoft.com/en-us/library/ie/ff679980(v=vs.94).aspx im unsure why it is not working

results.tracks.foreach isn't a function. If it's supposed to be an array, it should be forEach — Matt Burland
– Matt Burland, Commented Sep 29, 2014 at 18:16
Make sure to post the full error message and context in the future. — user2864740
– user2864740, Commented Sep 29, 2014 at 18:24

Mike Robinet · Accepted Answer · 2014-09-29 18:17:26Z

3

You are not passing the function, you are executing the function and passing the result.

Remove the parenthesis:

GpsGate.Server.MyService.getTracksByUser(groupName, user.username, getTracksByUser_callback);

There is also the error Matt Burland pointed out in the comments, where it should be forEach not foreach.

answered Sep 29, 2014 at 18:17

Mike Robinet

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2 Comments

user3576112 Over a year ago

thanks! removing the parenthesis however moves the function expected error to the getTracksByUser call

Mike Robinet Over a year ago

Move the function definition before you attempt to use it.

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