Suggestion: Add comparator for structs about golang-set HOT 4 OPEN

On Wed, Jul 10, 2024 at 4:01 PM Michael Standen ***@***.***> wrote: Here's some pseudo code for the pattern I've got. Please forgive errors. type Entity struct { ID uint64 Data1 string Data2 bool // ... UpdatedAt *time.Time } func Update(apiEntities []*Entity) error { dbEntities = db.ListEntities() origSet := mapset.NewSet(dbEntities...) updateSet := mapset.NewSet(apiEntities...) added := updateSet.Difference(origSet) // Process newly added entries removed := origSet.Difference(updateSet) // Process deleted entries } Entity's that come in via the API don't have an ID populated, this causes all data to not match. Also in this case UpdatedAt should be ignored when looking for equality. If we could pass a function to do the comparison, that would be a nice general solution. Something like: func entityEqual(a Entity, b Entity) bool { // Whatever logic here return a.Data1 == b.Data1 && a.Data2 == b.Data2 } func Update(apiEntities []*Entity) error { // ... added := updateSet.Difference(origSet, entityEqual) // ... } — Reply to this email directly, view it on GitHub <#139 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AABQ73R6UMVPORVJYVXZG23ZLW4NTAVCNFSM6AAAAABKVWYCHKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDEMRRGY3DMMBSGM> . You are receiving this because you commented.Message ID: ***@***.***>