Nodejs Synchronous For each loop

Question

I want to do a for each loop but have it run synchronously. Each iteration of the loop will do an http.get call and that will return json for it to insert the values into a

Answer 1

To loop and synchronously chain asynchronous actions, the cleanest solution is probably to use a promise library (promises are being introduced in ES6, this is the way to go).

Using Bluebird, this could be

Var p = Promise.resolve();
forEach(sets, function(item, index, arr) {
    p.then(new Promise(function(resolve, reject) {
         http.get(theUrl, function(res) {
         ....
         res.on('end', function() {
              ...
              resolve();
         }
    }));
});
p.then(function(){
   // all tasks launched in the loop are finished
});