Splice在forEach循环中工作

Question

当我尝试拼接我的数组时，它会删除错误的数组，我认为它在拼接时与forEach的索引有关。 现在试了几个小时，无法让它工作：/

     dpd.users.get(function (result) {
        $scope.persons = result;

            $scope.persons.forEach(function(entry, index) {
                dpd.timesheets.get({user:entry.id}, function (result2) {

                entry.timesheets = result2;

            //splice person if timesheets of person is empty

                if (entry.timesheets.length <=0){
                   $scope.persons.splice(index, 1);
                }

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