Hi David,
I do not think they exist but I may be wrong. I will have to check on
it. VBS is very strict except its variant variables themselves, allowing
type casting on the run.
Bruce
Sent: Monday, March 26, 2012 5:11 PM
Subject: ShortCircuit logical operators
Hello,
I am curious to learn if VBS has any support for short-circuit
operators, as in some higher level languages? The VBS reference is
silent on this point. For example, the expression:
if (A and B) or (C and D) then
...
end if
can be 'short-circuit' to the then portion if A is true -- *WITHOUT*
evaluating B, C, or D. This can come in very handy if verifying
something is in range of an array index *BEFORE* evaluating B, C, or
D which may depend upon a valid index variable. You can also see that
if this expression must be split apart into their own if statements,
the code can become very complicated, duplicated, and error prone in
a hurry. If I have to break it apart, I think I'd opt for boolean
functions (more than one would be needed) to use in the expression.
but, shortCircuit operators are a lot more convenient.
Thanks!
David Helkenn
