list manipulation - How to map over inner keys of nested Associations?

Considering an association:

<|"a" -> <|aa-> "asc", bb-> "asd", cc-> 0, ImageType -> "asd", dd-> "asd"|>|>

How can I make the inner keys strings?

  <|"a" -> <|"aa"-> "asc", "bb"-> "asd", "cc"-> 0, "ImageType" -> "asd", "dd"-> "asd"|>|>

Answer

assoc= <|"a" -> <| aa-> "asc", bb->"asd", cc->0, ImageType->"asd", dd-> "asd"|>|>;
KeyMap[ToString]/@assoc

(* <|"a" -> <|"aa" -> "asc", "bb" -> "asd", "cc" -> 0, 
   "ImageType" -> "asd", "dd" -> "asd"|>|> *)

Update:

but what if I have n levels?

I hope there is a better/cleaner way to deal with nested associations than the following:

assoc2= <| a-> <| aa-> "asc", bb->"asd", cc->0, ImageType->"asd", 
          dd-> <|dd1->"asd", dd2->"asd2"|>|>|>;


Replace[assoc2/. Association->foo, Rule[a_,b_]:>Rule[ToString[a],b],
        {0,Infinity}]/. foo->Association
(* <|"a" -> <|"aa" -> "asc", "bb" -> "asd", "cc" -> 0, 
   "ImageType" -> "asd", 
   "dd" -> <|"dd1" -> "asd", "dd2" -> "asd2"|>|>|> *)

Comments

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