variable access problem. Please Help!

Hello on line 30 of my javascript I log an array to the console. on line 31 i try to access a specific item in that array and the result is always undefined. I don’t know how this is possible.

Please share your code, otherwise we are not going to be able to check it.

This is because $.getJSON is asynchronous. The for loop will complete before the data all comes back.
For example, do this:


You will see that i is always 8. isStreaming[8] is undefined.

For more information on this specific issue, see this:

I would greatly recommend you learn more about asynchronous JavaScript and callbacks. It is an essential “feature” (or as some call it “Callback Hell”) of Javascript.

Here is a great free tutorial: