I've seen postwalk and prewalk but never really played around with them so
I will give it a shot.
Thanks for your input!
Ryan
On Tuesday, December 10, 2013 10:29:51 AM UTC+2, Jeroen van Dijk wrote:
>
> Don't forget about the option of walking over a map by using
> clojure.walk/postwalk or clojure.walk/prewalk
>
> I use these functions often lately. Especially useful if you have to
> update values in your map and they could occur anywhere. It is a bit tricky
> to get working at first, because the return value of each step needs to
> match the structure that is currently walked. For that reason you sometimes
> need to switch between a postwalk instead of a prewalk etc.
>
> Try this for a demo
>
> (def m
> {"outerKeyA" {:innerKeyA {"string id" {:foo 1 :bar 2}}}
> "outerKeyB" {:innerKeyB {"string id" {:bar 5 :baz 10}}}})
>
> (clojure.walk/postwalk-demo m)
>
>
>
>
> On Thu, Dec 5, 2013 at 11:06 AM, Ryan <[email protected] <javascript:>>wrote:
>
>> Thanks guys for the useful answers :)
>>
>> Ryan
>>
>>
>> On Wednesday, December 4, 2013 1:27:57 AM UTC+2, James Ferguson wrote:
>>>
>>> `update-in` could be helpful, depending on what exactly you're doing.
>>>
>>> (doseq [keyA keys, keyB otherkeys]
>>> (update-in m [keyA keyB] some-function))
>>>
>>> On Tuesday, December 3, 2013 6:05:14 PM UTC-5, Ryan wrote:
>>>>
>>>> Hi all,
>>>>
>>>> I am trying to figure out a better way to loop the following map than
>>>> using nested doseq. The map has the following structure:
>>>>
>>>> (def m
>>>>> {"outerKeyA" {:innerKeyA {"string id" {:foo 1 :bar 2}}}
>>>>> "outerKeyB" {:innerKeyB {"string id" {:bar 5 :baz 10}}}})
>>>>
>>>>
>>>> So, right now i am doing the following:
>>>>
>>>> (doseq [[outer-keys collections] m]
>>>>> (doseq [[collection-name collection] collections]
>>>>> (doseq [[string-id data] collection]
>>>>> ;; do stuff with all the above
>>>>> )))
>>>>
>>>>
>>>> Is there a more idiomatic/better way to do deeply nested
>>>> iterations/traversal of map of maps?
>>>>
>>>> Thank you for any replies!
>>>>
>>>> Ryan
>>>>
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