ios - Mutating NSDictionary inside NSArray -

is there quick way of mutating nsarray of nsdictionaries? have big nsarray , want update value particular key inside nsdictionary. there quick way of mutating inner dictionaries update them.

assuming original array contains immutable dictionaries 1 way create new array mutable copies of of original dictionaries.

nsmutablearray *newarray = [nsmutablearray arraywithcapacity:oldarray.count]; (nsdictionary *dict in oldarray) {     [newarray addobject:[dict mutablecopy]]; } 

now of work on newarray.