On Mon, 29 Mar 1999, Wei Xie wrote: > > Dear Rooter, > > Maybe the question is already exist in ROOT digest but I failed to > find it: > > How to know if an object is exist or not ? > you can use: Bool_t is_alive = obj->Testbit(kNotDeleted); however this is n o t 100 % save, since obj may point to any meanwhile overwritten area in memory. If you dont use the lower 24 bits of fBits otherwise you could make it quite save. > One more question is : > > Is there a easy way to lookup ROOT digest if my question has > already been answered or not, e.g. to find a my keyword is in the > contant (not subject) of a e-mail ? Trying to go through every > message is really not easy. > Cant help on this Cheers Otto ---------------------------------------------------------------------------- Otto Schaile Sektion Physik der LMU Muenchen Phone: (+49 89)289 14070 Am Coulombwall 1, D-85748 Garching, Germany FAX: (+49 89)289 14072 EMail: Otto.Schaile@Physik.Uni-Muenchen.DE
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