Hi, If you are in tests context, you can have a look at go-testdeep [1] and its Shallow operator [2] like in: https://go.dev/play/p/kNItQmDOJDy
Regards, Max. [1]: https://github.com/maxatome/go-testdeep/ [2]: https://go-testdeep.zetta.rocks/operators/shallow/ Le mardi 18 juillet 2023 à 17:55:57 UTC+2, Jochen Voss a écrit : > Thanks Jason, I get your point about DeepEqual now :) > > On Tuesday, 18 July 2023 at 16:52:51 UTC+1 Jason Phillips wrote: > >> Also note: reflect.DeepEqual doesn't *just* compare the contents of the >> map. It only compares contents if the maps aren't "the same map object". >> From the documentation: >> >> > Map values are deeply equal when all of the following are true: they >> are both nil or both non-nil, they have the same length, and either they >> are the same map object or their corresponding keys (matched using Go >> equality) map to deeply equal values. >> >> Comparing if they're "the same map object" is done in the way described >> earlier, which seems exactly what you're looking for. >> >> On Tuesday, July 18, 2023 at 11:44:53 AM UTC-4 Jason Phillips wrote: >> >>> reflect.Value.UnsafePointer() is probably not safer than using unsafe >>> directly, assuming you're using unsafe in a way that doesn't break the >>> rules. Reflect is doing effectively the same unsafe.Pointer conversion >>> under the hood [1]. It's certainly easier on the eyes, in my opinion, >>> though. >>> >>> [1] - >>> https://cs.opensource.google/go/go/+/refs/tags/go1.20.6:src/reflect/value.go;l=103 >>> >>> On Tuesday, July 18, 2023 at 11:25:42 AM UTC-4 Stephen Illingworth wrote: >>> >>>> >>>> I like that. I think it's is quite a smart way of doing it, >>>> >>>> I don't think you need to check both maps when choosing a key. Once >>>> you've found a candidate key in one map, you can test the other map and if >>>> it *does* exist then the two maps aren't equal. You've then saved the >>>> insertion and deletion step. I would also prefer to use rand.Int() rather >>>> than a linear search. >>>> >>>> https://go.dev/play/p/ftBGgQMuvvC >>>> >>>> >>>> On Tuesday, 18 July 2023 at 15:35:38 UTC+1 Jochen Voss wrote: >>>> >>>>> Dear all, >>>>> >>>>> To implement the "eq" operator in a simple PostScript interpreter, I >>>>> need to determine whether two maps are the same object. >>>>> >>>>> This can be done by adding a new element to one map, and checking >>>>> whether the new entry also appears in the second map, but as you can >>>>> imagine, the resulting code is quite ugly. See >>>>> https://go.dev/play/p/AfembYDt3en for an implementation of this idea. >>>>> >>>>> Is there a better way? >>>>> >>>>> Many thanks, >>>>> Jochen >>>>> >>>>> -- 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/bd04bff9-5d1b-42c6-99b5-e0fd3cc8102dn%40googlegroups.com.
