如何在ajax请求中通过索引访问客户数组

我的函数如下所示:-

 function getCustomers() {
        var len = 5;
        var customers = new Array(len);
        var _promises = [];
        for (var i = 0; i < 5; i++) {

             var p = dataService.get(sData, 'Customer').then(function (data) {
                 if (data.entity === "Customer" && data.id > 0) {
                       //*******I am in need to access customers by index (i)**********;
                       //customers[i] = data.id
                       return alert("loop "+i); 
     //***** Issue-this alerts 5 times "loop 6" ***///////
                    }
             })

             _promises.push(p);
            }


        }

        $q.all(_promises).then(function () {

        })
    }

这就是Angular(数据服务)的样子

 function read(data, entityName) {
        var url = "API_Url"
        return $http({
            method: 'GET',
            url: url,
        })
        .then(success)
        .catch(exception);

       function success(response){
       return response.data;
       }
    }