Alternatively, you could sprinkle (into [] ..) to feed the result of remove/filter back into a vector.
On Tue, Apr 8, 2014 at 7:16 PM, Gary Trakhman <gary.trakh...@gmail.com>wrote: > My response had the assumption that this is an example of an X-Y problem > :-). > > If you want to literally do what you said, then you can't use update-in > because the value at that point is a seq. > > If you have to continue in this way, for some reason, what you probably > want is map-indexed, which provides the index of the element as one of the > parameters to the mapping function. > > You could use a helper to build a function that only operates on that > particular element. > > I caution that you might run into a stackoverflow due to laziness if you > do this enough without realizing the seq. > > This just feels unidiomatic to me, though. > > > > > > On Tue, Apr 8, 2014 at 7:10 PM, Ivan Schuetz <ivanschu...@gmail.com>wrote: > >> 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 <ivans...@gmail.com> 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. >>>>>>> >>>>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Clojure" group. >>>> To post to this group, send email to clo...@googlegroups.com >>>> >>>> Note that posts from new members are moderated - please be patient with >>>> your first post. >>>> To unsubscribe from this group, send email to >>>> clojure+u...@googlegroups.com >>>> >>>> For more options, visit this group at >>>> http://groups.google.com/group/clojure?hl=en >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "Clojure" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to clojure+u...@googlegroups.com. >>>> >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clojure@googlegroups.com >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.