Asynchronous Calls and Recursion with Node.js

Question

I\'m looking to execute a callback upon the full completion of a recursive function that can go on for an undetermined amount of time. I\'m struggling with async issues and was

Answer 1

If your recursive function is synchronous, just call the callback on the next line:

var start = function(callback) {
  request.get({
    url: 'aaa.com'
  }, function (error, response, body) {
    var startingPlace = JSON.parse(body).id;
    recurse(startingPlace, otherFunc);
    // Call output function AFTER recursion has completed
    callback();
  });
};

Else you need to keep a reference to the callback in your recursive function.

Pass the callback as an argument to the function and call it whenever it is finished.

var start = function(callback) {
  request.get({
    url: 'aaa.com'
  }, function (error, response, body) {
    var startingPlace = JSON.parse(body).id;
    recurse(startingPlace, otherFunc, callback);
  });
};