On Fri, Dec 24, 2021 at 9:38 AM Kevin Chowski <ke...@chowski.com> wrote: > > On Friday, December 24, 2021 at 10:08:23 AM UTC-7 cuiw...@gmail.com wrote: >> >> does the range expr will be evaluated means when range expr is slice, the >> slice header will be copy, and when range expr is array, array will be coy? > > > I believe this is true, but I don't quite know why it is guaranteed in the > specification. Someone else may be able answer this question with more > evidence.
Yes, the slice header or the entire array will be copied when the loop starts (at least conceptually copied--the compiler can eliminate the actual copy if it doesn't make any difference). This clarifies what happens if the range loop changes the slice or array during the loop. 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/CAOyqgcUh6tJ%3DFNx_PyKfxCejvW4cUFbwd1nyP1vjGTfZQ9oyqw%40mail.gmail.com.
