In reply to a question from Jean Ries <[email protected]>, Ricardo Ovaldia
<[email protected]> writes
> I find that sometimes -discard- does not always work, so I like
> using -program drop _all- instead.
and Nick Cox <[email protected]> commented further that
> -discard- as I understand it includes -program drop _all-.
That is very close, but the distinction is a bit more subtle. -discard- drops
all "automatically loaded programs" and that means any programs defined by any
ado-file. It does not drop programs defined interactively or in do-files.
-program drop _all- does not distinguish and drops them all. It would be
extremely rare, but neither will drop a program if that program is currently
running, for example if -discard- were a line in the program itself or a
subprogram called by the program.
-- Vince
[email protected]
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