In that case, for a nested struct from top to bottom, all the values are copies as values, correct? i.e, string, int, float, array etc will be copied by value & map, slice, channel etc will be copied as pointers if they are initialized?
https://play.golang.org/p/NzH8LVyQ0rp code works as I wanted. Generally, what practice should I follow? If I want a shared variable, should I have to keep all the variables as pointers like in the example (https://play.golang.org/p/NzH8LVyQ0rp) or like the way I showed earlier? On Tuesday, March 6, 2018 at 3:40:47 PM UTC-5, Burak Serdar wrote: > > On Tue, Mar 6, 2018 at 1:23 PM, <bharat...@gmail.com <javascript:>> > wrote: > > go version 1.10 > > > > > > Operating system and processor architecture > > > > GOHOSTARCH="amd64" > > GOHOSTOS="darwin" > > However, this happens in play.golang.org env as well. > > > > > > Checkout the code. > > > > https://play.golang.org/p/v6u7R_nbGRp > > doc1 := Document{} > // Here, doc1.Data is nil > > ds := DataStore{Doc: doc1} > // Here, ds.Doc has a copy of doc1, and ds.Doc.Data is nil > > ds.Doc.Data = DocData{} > // Here, ds.Doc.Data is initialized, but not doc1.Data, because > ds.Doc is a copy of doc1 > > > On the other hand: > > doc2 := Document{Data: DocData{}} > // Here, doc2.Data is initialized to an empty map > ds2 := DataStore{Doc: doc2} > // And here, ds2.Doc is a copy of doc2, which contains a reference to > that empty map. The underlying maps are shared. > > > > > > > > > In the example, if the struct (Document) is not initialized at first, > there > > is no place holder for future values pointing to same object. Is this > > intended? > > > > -- > > 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...@googlegroups.com <javascript:>. > > For more options, visit https://groups.google.com/d/optout. > -- 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. For more options, visit https://groups.google.com/d/optout.
