Thanks to all who replied. The form "if X <= [a,b] then" reads more
intuitively to me, and changing the code to that form does not change
the behavior. I finally understand! :-)
At 09:06 PM 4/17/2007, you wrote:
>Sean Cross wrote:
> > I would suggest
> >
> > If (X = []) or (X = [a]) or (x = [b]) or (X = [a,b]) then...
> >
> > But the original code seems fine to me.
>
>What I think is the most direct way of writing it is this:
>
>if X <= [a,b] then
>
>That's checking whether X is a subset of {a,b}.
>
>You could also do this:
>
>if X + [a,b] = [a,b] then
>
>--
>Rob
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Regards,
Sid Gudes
PIA Systems Corporation
[EMAIL PROTECTED]
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