queryLogic.filterMembersAndGetCount(a, [b,] bData)

filterMembersAndGetCount is just like filterMembers, except it includes a count of the number of records that would be returned if the pagination properties were removed.

In the following example, notice how there are 3 records of {type: "dog"} in the source data, but only two records are provided in data:

import {QueryLogic} from "can";

const queryLogic = new QueryLogic();

const filtered = queryLogic.filterMembersAndGetCount(
  {filter: {type: "dog"}, page: {start: 0, end: 1}},
  {},
  [
    {id: 1, type:"cat"},
    {id: 2, type: "dog"},
    {id: 3, type: "dog"},
    {id: 4, type: "zebra"},
    {id: 5, type: "dog"}
  ]
); 
console.log( filtered ); //-> {data: [{id: 2, type: "dog"},{id: 3, type: "dog"}], count: 3}