1. Re: Short Circuiting
- Posted by Joe Phillips <bubba at TXWES.EDU>
Jun 23, 1998
-
Last edited Jun 24, 1998
At 07:56 PM 6/23/98 -0400, you wrote:
>>Boom! As soon as a length < 3 comes along, the code crashes. So it's
>>modified to:
>>
>> if length( s ) > 2 then
>> if compare( s[1..3], "EOF" ) = 0 then
>> ...
>> end if
>> else
>> ...
>> end if
>>
>>Only now, I'm stuck not being able to get to the 'else' portion of the
>>logic. Grrr...
>
To get the above code to work, you could create a function into which you
send s. This would provide a single point of logic that would allow a
simple if-then-else structure as you desire. (Although a short-circuit
logic would be cleaner)
( the extra sequence s2 allows allows flexibility )
check_s( sequence s1, sequence s2)
if length(s1)>= length(s2) then
if compare(s1[1..length(s2)],s2) then
return true
end if
end if
return false
end procedure
if check_s(s,"EOF") then
.
.
else
.
.
end if
Joe Phillips, Assistant Director
Information Technology Services
Texas Wesleyan University 817-531-4284
