asynchronous for each

[darkdragon-001]

I find myself doing the following over and over again:

var items = [1,2,3,4]; // some array
var itemsP = items.map(function(item){
  // do some blocking operation with item which returns a promise
  return item;
});
return q.all(itemsP);

Maybe it makes sense do define a function Q.each or Q.map as follows

Q.each = function(arr, func) {
  return q.all(arr.map(func));
}

[benjamingr]

I think the API surface is pretty frozen at this point, but you can either use a library with these helpers like https://github.com/petkaantonov/bluebird or implement them yourself (like you did above)