Docmarten

// Controller
.controller('ProdsCtrl', function($scope,$http,Prods,$q) {
    // first push
    $scope.prods= Prods.all();
}


// Services
.factory('Prods', function($http,$q) {
var promise1 = $http({method: 'GET', url: vendorA_url, cache: 'true'})
   .success(function(data, status, headers, config) {
	vendorProds = data["products"] ;
	// reformat results
	for (var x=0;x<vendorProds.length;x++) {
	   allProds.push({vendor:vendorID,prod_id:vendorProds[x].id,prod_name:vendorProds[x].name,prod_cost:vendorProds[x].cost}) ;
	}
   }).error(function(data,status,headers,config) {
	allProds.push({vendor:vendorID,error_message:"Unable to complete request to:"+vendorA_url}) ;
   }) ;
}) ;

var promise1 = $http({method: 'GET', url: vendorB_url, cache: 'true'})
   .success(function(data, status, headers, config) {
	vendorProds = data["productList"] ;
	// reformat results
	for (var x=0;x<vendorProds.length;x++) {
	   allProds.push({vendor:vendorID,prod_id:vendorProds[x].product_id,prod_name:vendorProds[x].product_name,prod_cost:vendorProds[x].product_cost}) ;
	}
   }).error(function(data,status,headers,config) {
	allProds.push({vendor:vendorID,error_message:"Unable to complete request to: "+vendorB_url}) ;
   }) ;
}) ;

$q.all([promise1, promise2]).then(function(allProds){
	console.log(data[0], data[1]);
});

return {
   all: function() {
      return allProds ;
   }
}