As I said I already looked in the docs, and know these basic examples, but
I don't know how to do:
*"How can I say in a vector of records e.g. "set name of element to "foo"
where id is equal 1"?"*
The remove by Id works, I posted it only to show something which might be
similar to the update I'm looking for.
I also wrote filter:
(nth (filtered (filter #(= (:id %) id) @dataprovider/products)) 0)
This gives me the element I need to update, but I still don't know how I
update this element in the vector.
Am Mittwoch, 9. April 2014 00:27:41 UTC+2 schrieb Gary Trakhman:
>
> Maybe this will help:
>
> > (update-in [[] 2 3 4] [0] (constantly 1))
> [1 2 3 4]
>
> > (update-in [[] 2 3 4] [2] (constantly 1))
> [ [ ] 2 1 4]
>
> > (update-in [[] 2 3 4] [1] (constantly 1))
> [ [ ] 1 3 4]
>
> > (update-in [[] 2 3 4] [0 :a] (constantly :b))
> java.lang.IllegalArgumentException: Key must be integer
>
> > (update-in [[] 2 3 4] [0 0 :a] (constantly :b))
> [ [{:a :b}] 2 3 4]
>
>
> On Tue, Apr 8, 2014 at 6:22 PM, Ivan Schuetz <[email protected]<javascript:>
> > wrote:
>
>> I would use merge to update the record with the map... but I don't know
>> how to get it from filter operation. Maybe I should not solve this with
>> 1-liner.
>>
>> Am Mittwoch, 9. April 2014 00:14:09 UTC+2 schrieb Ivan Schuetz:
>>
>>> Ahh dataprovider/products should be "items". Forgot to "simplify".
>>>
>>>
>>> Am Mittwoch, 9. April 2014 00:12:48 UTC+2 schrieb Ivan Schuetz:
>>>>
>>>> Hi,
>>>>
>>>> sorry I don't get it. I just started learning Clojure.
>>>>
>>>> I did this to remove element with id 1
>>>>
>>>> (commute items #(remove (fn [x](= (:id x) id)) %))
>>>>
>>>> From your statement I understand update-in would work for the update,
>>>> but I don't know the syntax. Something like
>>>>
>>>> (commute dataprovider/products #(update-in % {:id id} (->Item ???)
>>>> ))
>>>>
>>>>
>>>>
>>>>
>>>> Am Mittwoch, 9. April 2014 00:01:00 UTC+2 schrieb Gary Trakhman:
>>>>>
>>>>>
>>>>>> But 1. Can't find examples with records, 2. Not sure if I can use it
>>>>>> to update a different field than the one I'm using to do the query. In
>>>>>> the
>>>>>> examples fields seem to be the same.
>>>>>>
>>>>>>
>>>>>>
>>>>> Leave off the last path segment and return the full updated record,
>>>>> not just the new field's value.
>>>>>
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