Setting local variable in a JavaScript callback function

Question

I\'m relatively new to JavaScript and I thought I knew how callback functions worked but after a couple of hours of searching the web I still do not understand why my code i

Answer 1

The success function doesn't execute immediately, but only after the HTTP-response arrives. Therefore, array is still undefined at this point. If you want to perform operations on the HTTP-response data, do it from within the success function, or alternatively, define that operation inside of a function and then invoke that function from within the success callback.