On Wed, Jun 23, 2010 at 3:01 PM, Dheeraj Pandey <dhee...@alumni.utexas.net>wrote:
> Java doesn't have such a thing. Is this by design? If yes, would love to > understand the rationale of why > clearing-everything-and-reinserting-(N-1)-values is so much better than: > (a) providing an API to do so, and > There is actually a pending change to provide a much nicer API for this sort of modification. It will probably be in the next release, so if you can be patient things should improve soon! > (b) providing a more optimized implementation that is not O(n) on a delete. > This would really be up to the application though: it is often the case that repeated fields are order dependent, so deletes may be worst case O(n) in order to shift the elements. Something like SwapElements in the C++ implementation would allow the client to do something more efficient if they do not care about order, though I'm not sure if the aforementioned change will provide this. > Thanks > Dheeraj > > > On Wed, Jun 23, 2010 at 7:21 AM, Igor Gatis <igorga...@gmail.com> wrote: > >> C++ code has the RemoveLast method. If there is such thing in Java, you >> could remove 1 item by shifting everything one position earlier and than >> calling RemoveLast. Batch removal can be also accomplished in the same with >> two counters. >> >> >> On Wed, Jun 23, 2010 at 7:03 AM, Thomas Broyer <t.bro...@gmail.com>wrote: >> >>> >>> On 23 juin, 07:02, Dheeraj <dhee...@gmail.com> wrote: >>> > How do I delete an entry from a list in a protobuf (repeated field)? I >>> > can add, I can modify, but I cannot delete using any of the generated >>> > APIs. A getList() returns an unmodifiable collection. >>> >>> Clear the field and then re-add values. You can also set the field >>> with a List<?> (setField with the FieldDescriptor for your repeated >>> field), which has the same effect. >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Protocol Buffers" group. >>> To post to this group, send email to proto...@googlegroups.com. >>> To unsubscribe from this group, send email to >>> protobuf+unsubscr...@googlegroups.com<protobuf%2bunsubscr...@googlegroups.com> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/protobuf?hl=en. >>> >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "Protocol Buffers" group. >> To post to this group, send email to proto...@googlegroups.com. >> To unsubscribe from this group, send email to >> protobuf+unsubscr...@googlegroups.com<protobuf%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/protobuf?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Protocol Buffers" group. > To post to this group, send email to proto...@googlegroups.com. > To unsubscribe from this group, send email to > protobuf+unsubscr...@googlegroups.com<protobuf%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/protobuf?hl=en. > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To post to this group, send email to proto...@googlegroups.com. To unsubscribe from this group, send email to protobuf+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/protobuf?hl=en.
