I'm trying to decouple algorithm from type. if an algorithm works on a collection, it ought to work on either a map or slice. It appeared that result.Value facilitated the decoupling entirely, until I ran into the limitation with array/slice. It seems odd that I have to use the unsafe the package with array/slice esp. given the support provided for maps with SetMapIndex. I figure I must be missing something…
On Fri, Jun 4, 2021 at 8:44 PM Kurtis Rader <kra...@skepticism.us> wrote: > More context would be useful; i.e., what are you really trying to do and > why? Such information often allows people to provide better answers; > including whether this is an example of the [XY Problem]( > https://xyproblem.info/) or you have a misunderstanding how slices work. > Given your play.golang.org reproducer neither of those responsies seem > likely but nonetheless... > > On Fri, Jun 4, 2021 at 8:29 PM Deiter <hwaterf...@gmail.com> wrote: > >> The reflect package provides the SetMapIndex method for updating elements >> in a map that are represented by a reflect.Value type, but I don’t see an >> equivalent for array/slice. >> >> The sample app (link provided below) includes an example of map that’s >> been made accessible through a a reflect.Value type variable. One of the >> elements in the map is updated using SetMapIndex. >> >> The sample app also includes an example of a slice containing exactly the >> same data as the map. As far as I can tell, the only way to update an >> element of the slice through a reflect.Value type variable is to introduce >> unsafe package >> >> Is there a better way that I’m missing that doesn’t require the use of >> the unsafe package >> >> SetMapIndex() equivalent for slice/array >> <https://play.golang.org/p/X6gsBUW4ME4> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "golang-nuts" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to golang-nuts+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/golang-nuts/e292b828-4ba9-420d-af2d-8c98fc451ef9n%40googlegroups.com >> <https://groups.google.com/d/msgid/golang-nuts/e292b828-4ba9-420d-af2d-8c98fc451ef9n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > Kurtis Rader > Caretaker of the exceptional canines Junior and Hank > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAP6bC04D20ZAXycTGPQ-m2gdT8d3Ya9rG%3D08cUAUvdjswp2Y2g%40mail.gmail.com.
