Syntax:

    users = queryNew( "id,userType,name", "integer,varchar,varchar" );

    queryAddRow(users, [{
        id: 1,
        userType: "user",
        name: "John"
    },{
        id: 2,
        userType: "admin",
        name: "Sam"
    },{
        id: 3,
        userType: "user",
        name: "Tom"
    }]);

    adminUsers = users.filter( function( user ){
        return user.userType == "admin";
    } );