Browsing in Pharo, I found that Dictionary has a subclass KeyedTree, which is in effect a set of nested dictionaries. Retrieval is by quoting a path, which is simply an array of keys. So in your case it would read:

dict1 atPath: #(���key1��� ���key2��� ���key3���).

This might be more efficient than repeated use of the DNU mechanism. It is not clear (to me, at least) how to construct the nested dictionaries as a KeyedTree in the first place, but this might be an alternative approach.

Hope this helps

Peter Kenny

From: Pharo-users [mailto:pharo-users-bounces@lists.pharo.org] On Behalf Of Markus B��hm
Sent: 24 April 2017 18:42
To: pharo-users@lists.pharo.org
Subject: [Pharo-users] Hot to retrieve values from Nested Dictionaries

May I ask:

What's the idiomatic way to retrieve values from nested dictionaries?

(((dict1 at: 'key1') at: 'key2') at: 'key3')

Are all the brackets really necessary?

BR Mike