Could we have an operation like append() for slices? How about:
m := insert(m, "key", "value"). It returns m unchanged if it's allocated, otherwise, it allocates. We're already familiar with this kind of function. -- Marcin On Mon, Sep 23, 2019 at 10:58 PM abuchanan via golang-nuts < golang-nuts@googlegroups.com> wrote: > Ah, thanks Ian, that's exactly the kind of requirement I was looking for. > > (also, you said "without" but you probably meant "while") > > Perhaps this is a job for "go vet". And/or, looks like staticcheck.io has > a check I can try: https://staticcheck.io/docs/checks#SA5000 > > > > > > On Monday, September 23, 2019 at 9:45:37 PM UTC-7, Ian Lance Taylor wrote: >> >> On Mon, Sep 23, 2019 at 2:40 PM abuchanan via golang-nuts >> <golan...@googlegroups.com> wrote: >> > >> > Is there anything written down on why assignment to a nil map causes a >> panic? I'm curious if there were carefully considered tradeoffs while >> making this decision. >> > >> > Assignment to nil maps has caused most of the unexpected panics I've >> seen. Many times these happen in production and cause an incident. Every >> time it happens I think, "we've got to do something about this." >> > >> > I'm not sure what the best solution is yet, but there must be something >> better than the status quo. Would it be possible to have assignments >> automatically initialize a nil map? >> >> I agree that this is awkward. But we've never been able to think of a >> way to make an assignment to a nil map initialize the map without also >> preserving the very useful property that the zero value of any Go type >> can be represented by a sequence of zero bytes. >> >> Ian >> > -- > 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/d9cc8fb3-7d73-48c0-8c60-9d9b1022054c%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/d9cc8fb3-7d73-48c0-8c60-9d9b1022054c%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CA%2Bv29LvMsYoVs4Q6TiUdNfb4eJjWcAcD5t4xaxuxLxwqpvo9Dg%40mail.gmail.com.
