[nycfoxsig] Correction/Clarification
- From: Lew <lew1716@xxxxxxxxxxxxx>
- To: nycfoxsig@xxxxxxxxxxxxx
- Date: Tue, 14 Aug 2007 09:34:46 -0400
Our speaker has offered the following correction/clarification to my
introduction to his topic:
I should clarify that the presentation I'm giving is for a LOGICAL N-TIER
design in VFP....where the UI can
see the Data Layer (i.e., where the form can see the cursor created in the
dataobject). Your suggestion
earlier seemed to give an impression that I was talking about PHYSICAL N-TIER
design, where the processes are
all in different physical spaces/memory.
... so I asked:
I don't understand the distinction. Don't grids and lb's "see" cursors in the
data layer(Unless we use arrays
exclusively)?
Michael explained:
PHYSICAL n-tier is like working with COM objects...where you instantiate the
object and it's its own "black
box" of sorts, only giving you what you ask of it. LOGICAL n-tier is more
transparent.
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