Thanks, Ron. I have an Ada background and am familiar with the OOP
paradigm and C, but not so much C++. Also, I've been away from that
stuff for years and I'm relearning a lot of what I've forgotten! You
know what they say... use it or lose it!
Dave
At 02:29 PM 3/26/2012, you wrote:
I don't believe VBScript short-circuits logical operators.
I'm not sure whether JScript does either, but this question and the
previous one have prompted me to say this anyway: if you are already
familiar with ALGOL-derived languages like C or Java, you might find
that JScript fits your mental model better.
On 3/26/2012 5:11 PM, David Helkenn wrote:
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
