Thanks a lot again!
Sorry if I’m bothering you so much but there’s something not clear for me, yet…
I have N (for the following exercise let’s this N being 2) files with, each, one “normal” tree (“fast”) with a lot of entries and one tree (“slow”) with just one entry.
I put “slow” trees into a chain (the pointer is “slow”) (for the “fast” ones is the same in a chain with the pointer “slow”) and I have:
[code]root [37] slow->Scan(“Entry$:This->GetTreeNumber()”)
- Row * Entry$ * This->Get *
-
0 * 0 * 0 * -
1 * 1 * 1 *
(Long64_t)2[/code]
Then I try to Build the Index based on TreeNumber since then I would like Add this as Friend of the “fast” chain and getting the entry trough the GetTreeNumber(): when the “fast” chain changes file and so tree I want also the “slow” one changing tree and then giving back always its “fixed” values.
root [38] slow->BuildIndex("This->GetTreeNumber()")
(Int_t)2
root [39] slow->GetEntryNumberWithIndex(0)
(const Long64_t)1
root [40] slow->GetEntryNumberWithIndex(1)
(const Long64_t)0
root [41] slow->GetEntryNumberWithIndex(2)
(const Long64_t)0
I’m failing in understanding the result or the entry number I get back are wrong?! I should obtain 0, 1 and then always 0 or 1 or, better some “error” number (like -1…), isn’t it?
Ciao,
Matteo