asdf.js

var items = [{
  content: 'hotdog 1'
}, {
  content: 'hotdog 2'
}, {
  content: 'hotdog 3'
}, {
  content: 'hotdog 4'
}, {
  content: 'hotdog 5'
}];

var promises = _.map(items, function(item) {
  return itemsService.save(item);
});

$q.all(promises).then(function() {
  // all done
});