Hi Xie, it is not the question to ROOTTALK, it is the question to Bjarne Stroustrup, the author of C++. Victor 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 ? > > 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. > > Sincerely yours > Xie -- Victor M. Perevoztchikov perev@bnl.gov perev@vxcern.cern.ch Brookhaven National Laboratory MS 510A PO Box 5000 Upton NY 11973-5000 tel office : 516-344-7894; fax 516-344-4206; home 516-345-2690
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