AFNetworking/AFNetworking — pull request #1995 by barzhomi (2014-04-15 12:21:24+00:00)
Title: Adding the support of array values in AFDictionaryByRemovingKeysWithNullValues function

The implementation of AFDictionaryByRemovingKeysWithNullValues function in the master branch does not removing the null values from the part of serialized JSON if that part is array. So I've fixed that for me, hope that also will be useful for you.