small correction: sometimes one does need to nest a for or doseq call, but
not for the usual nested iteration case
On Monday, April 21, 2014 8:57:49 AM UTC-7, Justin Smith wrote:
>
> That doseq is a no-op, because str has no side effects and doseq always
> returns nil. Also there is no need to nest doseq calls. for is much like
> doseq except it actually returns the result.
>
> user> (for [lang (:langs langs)
> k (keys lang)]
> (str k " " (k lang)))
> (":lang Clojure" ":version 1.6" ":lang Erlang" ":version 17")
>
>
> On Monday, April 21, 2014 8:32:51 AM UTC-7, Hussein B. wrote:
>>
>> Hi,
>>
>> For a data structure such as:
>>
>> (def langs {:langs [ {:lang "Clojure" :version 1.6}
>> {:lang "Erlang" :version 17} ] } )
>>
>> How to iterate all the items of the maps?
>>
>> I tried this but it is too imperative to me:
>>
>> (doseq [lang (:langs langs)
>> (doseq [k (keys lang)]
>> (str k " " (k lang))))
>>
>> Thanks for help and time.
>>
>
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