jquery - Removing Multiple Objects from Javascript Array Breaks Half Way Through -

i have array of few hundred json objects...

var self.collection = [object, object, object, object, object, object…] 

each 1 looks this...

0: object    id: "25093712"    name: "john haberstich" 

i'm iterating through array searching each array.id see if matches ids in second array...

   var fbcontactids = ["1072980313", "2502342", "2509374", "2524864", "2531941"]      $.each(self.collection, function(index, k) {         if (fbcontactids.indexof(k.id) > -1) {             self.collection.splice(index, 1);         };     }); 

however code works splice 3 of objects self.collection array , breaks , gives following error:

uncaught typeerror: cannot read property 'id' of undefined  

the line causing error one...

if (fbcontactids.indexof(k.id) > -1) { 

could tell me i'm dong wrong here?

because length of collection change, trick loop rear front

for (var index = self.collection.length - 1; index >= 0; index--) {     k = self.collection[index];     if (fbcontactids.indexof(k.id) > -1) {         self.collection.splice(index, 1);     }; }