Andrei Alexandrescu, el 18 de noviembre a las 07:22 me escribiste: > Leandro Lucarella wrote: > >Andrei Alexandrescu, el 17 de noviembre a las 18:45 me escribiste: > >>>3. If you **really** care about performance, you should only append when > >>>you > >>>don't know the length in advance. If you know the length, you should > >>>always > >>>pre-allocate. > >>We will have collections and all those good things, but I don't see > >>how the proposal follows from the feedback. My perception is that > >>this is a group of people who use D. Bartosz' concern didn't cause > >>quite a riot, so as far as I can tell there is no big issue at > >>stake. > > > >I didn't say anything (until now) because this was discussed already. > >Dynamic arrays/slices appending is horribly broken (I know it's well > >defined, and deterministic, but you are just condemned to make mistakes, > >it just doesn't work as one would expect, even when you know how it works > >you have to keep fighting your intuition all the time). > > In which ways do you think arrays horribly broken? Same as Bartosz mentions?
Yes, I think dynamic arrays are grouping 2 separate things: a proper dynamic array able to efficiently appending stuff (without hacks like the size cache) and a slice (a read-only view of a piece of memory); a "random range" if you want to put it in terms of D. A dynamic array should be a reference type, a slice a value type. I explained my view before. I wont explain it with much detail again (I hope you remember the thread). > One question is whether you actually have had bugs and problems > coding, or if arrays stopped you from getting work done. I had many bugs because of the reallocation when appending. > >But it's a little pointless to keep making riots, when we were so close > >to finally fix this with T[new]/whatever and it all went back. > > Hmmmm... resignation is not a trait of this group :o). It is after a good fight :) >From time to time this kind of issues (that are present in the group since I can remember, which is about 4 years maybe) keep popping in the NG. I get tired of repeating myself over and over again (like may others, I guess). -- Leandro Lucarella (AKA luca) http://llucax.com.ar/ ---------------------------------------------------------------------- GPG Key: 5F5A8D05 (F8CD F9A7 BF00 5431 4145 104C 949E BFB6 5F5A 8D05) ---------------------------------------------------------------------- Hey, it's George. I got nothing to say. -- George Constanza, dejando un mensaje en la contestadora de Jerry
