Logical AND vs logical OR on empty boolean array

Just satisfying a curiousity...Can anyone tell me the logic behind this behavior (LV 7.1,8.0 and 8.2 do it)?
Logical AND on empty Bool Array = TRUE
Logical OR on empty Bool Array = FALSE
Of course there are very simple ways to work around this, but it doens't make sense. If the OR operator is FALSE for a given data set, how can the AND operator be TRUE?
Pic for proof.
Attachments:
emptyboolarray.JPG ‏41 KB

vituning wrote:
... how can the AND operator be TRUE?
The reasoning/logic has been discussed a few times in the past
e.g. http://forums.ni.com/ni/board/message?board.id=170&message.id=86827&requireLogin=False
=====================================================
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I have had some interesting times using IIF to display "X" when a bit is a word is true and "" when it is not. I THINK I understand it all now but would appreciate comments from anyone else to confirm that my understanding
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I was using, for example, the integer 8 as a bit mask to test for bit 3. In most programming language that I am familiar with, to test whether bit 3 is set in an integer X the test is "X and 8 = 8", looking for this to
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Yes your understanding is correct
This is from MSDN docuentation
Logical and Bitwise
Logical and bitwise operators perform logical manipulations between two integer terms in an expression.
Operator
Description
And
Performs a logical conjunction on two Boolean expressions, or bitwise conjunction on two numeric expressions.
see
http://msdn.microsoft.com/en-IN/library/dd255271.aspx
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

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I'm new to adf and i'm trying to build a sample project with jDevelopper 11.1.2.1.0 for my company to know if we can switch to it.
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if (newValue) {
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The strange thing is that at the "JSF Restore View" the backingbean is well created and filled with the ref of the ui components....
So here's my questions :
1) Why there is a difference when my button is on the template and when it's on the page ??? (with the backingbean)
2) Why the backingbean is not fully created (only the constructor is called and not the ui components bindings)
3) How can i realise my use case ?
4) Is there another method to implement UI Logic with template ?
5) Is there a better way to do this ?
6) How to get the context of the template ?
Thanks a lot for all of you who had the patience to read all of this, i know it's a lot
but i didn't know how to explain my problem without all thoses explanations.
I've read all the adf corner and all the given pdf books on the site (that i've found) trying to search for a solution and
didn't find one. So please don't tell me read the books, or the solution is already documented...
It would be a lot more helpfull to explain me why it's not working or why what a did is not a good solution.
Sorry for my poor english too.
Thanks a lot....
Angle
P.S 1:
In the swicthShowDetailItem method i've tried to change for using this :
if (newValue) {
RichShowDetailItem c = (RichShowDetailItem)getComponent("pt1:pt_pt1:pt_sdi2");
if (!c.isDisclosed()) {
  ((RichShowDetailItem)getComponent("pt1:pt_pt1:pt_sdi1")).setDisclosed(false);
  c.setDisclosed(true);
}It's working... but ugly and not efficient... so for me it's not a good answer....
P.S 2:
Another solution that i've found is that i could create an hidden button on the template
that call the change event and in the page create a button that queue a click event
on that button but for me it's not a solution.
P.S 3:
I dont like a JavaScript solution neither. for me, if a can bind my ui components to a backingbean
i want to be able to use them !!!
Edited by: 915518 on 19 févr. 2012 12:04
Edited by: 915518 on 19 févr. 2012 12:10

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Attachments:
DAC test.vi ‏47 KB

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Message was edited by: excLOUsiv

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Logical AND vs logical OR on empty boolean array

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