Aihong, just make the Or of the two options: myMap->Write("myMap", TObject::kOverwrite | TObject::kSingleKey); Rene Brun Aihong Tang wrote: > > Hi, > > I am trying to save a TMap object in to a TFile. > I want overwrite the existing object in the file and I also want the map > to be saved as a single key. > > In the Object::Write(), I found: > > // The option can be a combination of: > // kSingleKey and kOverwrite > // Using the kOverwrite option a previous key with the same name is > // overwritten. > // The kSingleKey option is only used by TCollection::Write() to write > // a container with a single key instead of each object in the > container > // with its own key. > > My question is how to combine these two options? > Should I try myMap->Write("myMap", TObject::kOverwrite && > TObject::kSingleKey) ? > > Thanks! > > Aihong
This archive was generated by hypermail 2b29 : Tue Jan 02 2001 - 11:50:31 MET