[REBOL] Re: Loop with negative count
From: greggirwin:mindspring at: 27-Dec-2006 19:02
Hi Tim,
>>> help loop
TJ> makes no reference to negative values for the 'count argument.
TJ> consider the following console session
>>> test: []
TJ> == []
>>> loop -4 [append test "hello"]
>>> test
TJ> == []
TJ> Can we reliably expect that a negative argument will be ignored?
So far. :) In the case of LOOP and REPEAT, it seems safe to say that
negative values make no sense, and will always be ignored. Others may
argue that REBOL should throw an error, but I imagine Carl considered
that behavior and chose not to do it, so you're probably safe. Maybe
we can get a quick answer from him to be sure though.
I wouldn't feel safe saying the same thing about all other functions.
For example, FORSKIP/FORALL changed, but hopefully for the better
since negative numbers would loop forever before, and now throw an
error.
-- Gregg
