Tx, I tried Your proposal. Just as an example, it works: (ZnClient new url: 'http://api.wunderground.com/api/APIKEY/hourly/q/germany/munich.json '; contentReader: [ :entity | (NeoJSONReader on: entity readStream) mapClass: NeoJSONObject; propertyNamesAsSymbols: true; next ]; get ) hourly_forecast collect: [:e | e FCTTIME hour_padded asInteger ] P.S.: Editor in Playground shows NeoJSONObject keys in red color? Am 24.04.2017 9:00 nachm. schrieb "Udo Schneider" < udo.schneider@homeaddress.de>:
If you are using NeoJSON you might want to take a look at the NeoJSONObject class. It's basically a Dictionary with "JavaScript" behavior. I.e. you can simply use messages to access keys and non existing keys return nil. Your example can thus be written as:
val := dict1 key1 key2 key3.
When using NeoJSON you can simply configure your Mapper (Reader/Writer) to use NeoJSONObject using #mapClass:
CU,
Udo
On 24/04/2017 20:04, Markus Böhm wrote:
Tx for advice.
P.S.: I got nested dictionaries after JSON API call at wunderground weather API. To see all the response in Pharo inspector "live" is really great :-)
BR Mike
On Mon, Apr 24, 2017 at 7:51 PM, Cyril Ferlicot D. < cyril.ferlicot@gmail.com <mailto:cyril.ferlicot@gmail.com>> wrote:
Le 24/04/2017 à 19:42, Markus Böhm a écrit : > 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
Hi,
To know if brackets are necessary you can use the "Format" option in your method.
Right click -> format
or cmd/alt/ctrl + shift + f
In this case you can just write:
((dict1 at: 'key1') at: 'key2') at: 'key3'.
-- Cyril Ferlicot https://ferlicot.fr
http://www.synectique.eu 2 rue Jacques Prévert 01, 59650 Villeneuve d'ascq France