Hi, I tried to find out how TObjArray::Sort work, but could not find the implentation of the method QSort which is used in there. But my main question is whether the sorting uses only the TObject::Compare method or whether IsEqual is also involved (form what I read in the users guide I guess not). In general it would be good to know where in the ROOT container classes Compare and IsEqual are used. Maybe the methods in TObject can get little docu about that? The user's guide tells about IsEqual that it is used in FindObject, but I know it's used also in TObjArray::IndexOf and TCollection::Contains Cheers Gero PS: Using 3.05_07, but also tried the most recent HTML documentation. ----------------------------------------------------------------------- Gero Flucke 1a / 603 DESY Notkestr. 85 22607 Hamburg +49-(0)40-8998-2454
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