1. Testing a sequence
I'm writing an add on to a program which needs a 'virtual' set of flags
which I'm setting up as elements of a length 12 sequence (VF).
The setting of the flags is not a time worry, but when I want to find out
if any of them have gone high I need to do so real quick.
What I'd like to know is do I have to test every element with a for-next
type loop or can I check if any of the elements has gone 1 by simply
checking - If vf.
Andrew (Razor) Sharp
2. Re: Testing a sequence
Why not make each flag as a bit in an integer, eg:
integer flag
flag =..... --etc
.....
.....
-- Test if any flags are "high...real quick"
if flag then -- yes! a flag is set
else -- no 
sorry. all flags are reset (ie zero)
end if
-----Original Message-----
From: Andrew Sharp <asharp at CHILLI.NET.AU>
To: EUPHORIA at LISTSERV.MUOHIO.EDU <EUPHORIA at LISTSERV.MUOHIO.EDU>
Date: Thursday, January 07, 1999 10:48 AM
Subject: Testing a sequence
>I'm writing an add on to a program which needs a 'virtual' set of flags
>which I'm setting up as elements of a length 12 sequence (VF).
>The setting of the flags is not a time worry, but when I want to find out
>if any of them have gone high I need to do so real quick.
>What I'd like to know is do I have to test every element with a for-next
>type loop or can I check if any of the elements has gone 1 by simply
>checking - If vf.
>Andrew (Razor) Sharp
>
3. Re: Testing a sequence
- Posted by Lucius Hilley III <lhilley at CDC.NET>
Jan 06, 1999
-
Last edited Jan 07, 1999
Someone stated using the bits of an integer for flagging.
Great idea but they didn't supply code showing how to actually
set the different bits of the integer. I suggest that method
be tested against the following method for speed.
function loop_test(sequence flag)--He hopes to avoid this.
for A = 1 to length(flag) do
if flag[A] then
return A -- OR use 1 if you don't care where.
end if
end for
end function
function find_test(sequence flag)--This should work much better.
return find(flag, 1) -- OR
-- return (find(flag, 1) > 0) --if you don't care where.
end function
sequence flag
flag = repeat(0, 12)-- You stated length 12.
--HIS actual code would do the flagging that is being done randomly here.
if rand(2) = 1 then
flag[rand(12)] = rand(2) - 1 --Just might flag it somewhere.
flag[rand(12)] = rand(2) - 1 --If it did. It just might flag another or
-- it might remove the flag.
end if
? loop_test(flag)--Both will report the same number
? find_test(flag)--But if both are done repeatedly find_test()
--Will be faster.
_________________________
"I'm good ! Not god." Lucius L. Hilley III - 1998
_________________________
Lucius L. Hilley III lhilley at cdc.net
http://www.cdc.net/~lhilley
http://www.dragonvet.com
_________________________
<IMG SRC="http://www.cdc.net/~ceace/images/lu4.jpg">
_________________________
On Wed, 6 Jan 1999 16:23:41 -0500, Andrew Sharp <asharp at CHILLI.NET.AU> wrote:
>I'm writing an add on to a program which needs a 'virtual' set of flags
>which I'm setting up as elements of a length 12 sequence (VF).
>The setting of the flags is not a time worry, but when I want to find out
>if any of them have gone high I need to do so real quick.
>What I'd like to know is do I have to test every element with a for-next
>type loop or can I check if any of the elements has gone 1 by simply
>checking - If vf.
>Andrew (Razor) Sharp
