javascript - checking individual element of an array by calling a method -

can optimize code bit more reduce number of line?

i checking/passing individual array elements? can make re-write in generic way?

for (var = 0; < $scope.studentreport.students.length; i++) {     if (_isvaluenan($$scope.studentreport.students[i].age))         $$scope.studentreport.students[i].age = null;      if (_isvaluenan($$scope.studentreport.students[i].number))         $$scope.studentreport.students[i].number = null;      if (_isvaluenan($$scope.studentreport.students[i].height))         $$scope.studentreport.students[i].height = null; }   var _isvaluenan = function (item) {     var result = false;     if (typeof item == 'number' && isnan(item))         result = true;     return result; } 

you can nullify property internally in function, , pass item , property value in independently. example:

for (var = 0; < $scope.studentreport.students.length; i++) {     _checkvaluenan($$scope.studentreport.students[i], "age");     _checkvaluenan($$scope.studentreport.students[i], "number");     _checkvaluenan($$scope.studentreport.students[i], "height"); }   var _checkvaluenan = function (item, valuename) {     if (typeof item[valuename] == 'number' && isnan(item[valuename]))         item[valuename] = null; } 

edit: leading on vicky gonsalves answer, additionally check of properties of object, might more scalable solution.

var _checkallvaluenan = function (item) {     for(var key in item) { // iterates item properties         if (!item.hasownproperty(key)) continue; // ensures not prop of prototype         if (typeof item[key] == 'number' && isnan(item[key])) item[key] = null;     } }  (var = 0; < $scope.studentreport.students.length; i++) {     _checkallvaluenan($scope.studentreport.students[i]); }