On 2005 Jan 13, at 16:13, Carlos Ribeiro wrote:
...
> +1, specially for the last sentence. An adapter with local state is
> not an adapter anymore! It's funny how difficult it's to get this...
> but it's obvious once stated.
...? A StringIO instance adapting a string to be used as a
readablefile is not an adapter?! It's definitely a pristine example of
the Adapter Design Pattern (per Gof4), anyway... and partly because of
that I think it SHOULD be just fine as an ``adapter''... honestly I
fail to see what's wrong with the poor StringIO instance keeping the
"we have read as far as HERE" index as its "local state" (imagine a
readonlyStringIO if you want, just to make for simpler concerns).
Or, consider a View in a Model-View-Controller arrangement; can't we
get THAT as an adapter either, because (while getting most data from
the Model) it must still record some few presentation-only details
locally, such as, say, the font to use?
I'm not sure I'm all that enthusiastic about this crucial aspect of
PJE's new "more pythonic than Python" [r]evolution, if it's being
presented correctly here.
Alex
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