Question

I’m a noob to JSON, and would like to do a foreach through all the variables that are given to the callback after a user of my Facebook application invites many users to it, using Requests 2.0

According to Facebook, this is the callback that is received.

{
  "request_ids": [
    0: "[request_id]",
    1: "[request_id]"
  ]
}

When I try to validate that with JSON Lint, it comes up as invalid. That doesn’t help me at all. I understand that the JSON is stored in a variable called response. You can look that up here.

I want to do a foreach of all the request id’s so that it’ll go something like this. Damn I don’t know how to do for/foreach loops in javascript.

for (response["*"] key in response){
    document.write("ajaxcontrols.php?createSlapAction=REQUEST_ID");
}

Answer 1

Do a loop like this:

for(var i = 0; i < response.request_ids.length; i++) {
  alert("Invitation ID: " + response.request_ids[i]);
}