Solved

Flip TRUE/FALSE

Posted on 2014-01-28
6
200 Views
Last Modified: 2014-02-01
Hi,

Generally I use the following to test if something is true/false then flip it, surely there is a one line method which will flip true/false..

    If Not ActiveSheet.Shapes("graphblur").Visible Then
        ActiveSheet.Shapes("graphblur").Visible = True
    Else
        ActiveSheet.Shapes("graphblur").Visible = False
    End If
0
Comment
Question by:DemonForce
  • 3
  • 2
6 Comments
 
LVL 10

Expert Comment

by:Korbus
ID: 39815608
The XOR logical operation can do this.
If you XOR a bit with itself, it will flip.  (if you XOR a BYTE with itself, it will flip all the bits.)

http://msdn.microsoft.com/en-us/library/wz3k228a.aspx

So...

ActiveSheet.Shapes("graphblur").Visible = ActiveSheet.Shapes("graphblur").Visible  Xor ActiveSheet.Shapes("graphblur").Visible
0
 
LVL 9

Accepted Solution

by:
nick2253 earned 500 total points
ID: 39815669
The XOR operation with itself will most definitely not flip a bit.

You have to XOR a bit with 1 to flip a bit using XOR.  You can clearly see it from the XOR truth table:
1 XOR 1 = 0
1 XOR 0 = 1

Open in new window

(flipping the bit, what you want to achieve)

vs
1 XOR 1 = 0
0 XOR 0 = 0

Open in new window

(always makes it 0, what you don't want)

So:
ActiveSheet.Shapes("graphblur").Visible = True Xor ActiveSheet.Shapes("graphblur").Visible 

Open in new window

0
 
LVL 10

Expert Comment

by:Korbus
ID: 39815703
Gosh,  you are abosultely right nick, one must Xor with 1, rather than itself to flip a value!

(So, what was I thinking about!?   Perhaps the swapping of two variables in memory?
http://c4learn.com/c-programs/swap-two-numbers-without-using-third.html)


Sorry about that!
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 46

Expert Comment

by:Martin Liss
ID: 39815741
ActiveSheet.Shapes("graphblur").Visible = Not ActiveSheet.Shapes("graphblur").Visible
0
 
LVL 10

Expert Comment

by:Korbus
ID: 39821688
Face palm (again).
Martin's answer is the best.
0
 
LVL 46

Expert Comment

by:Martin Liss
ID: 39821708
Thanks Korbus, now hopefully DemonForce will agree:)
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Dealing with unintended Excel Active-X resizing quirks (VBA code simulates "self correction") David Miller (dlmille) Intro Not everyone is a fan of Active-X controls in spreadsheets (as opposed to the UserForm approach, the older Form controls …
Introduction This Article briefly covers methods of calculating the NPV and IRR variants in Excel as well as the limitations in calculating and interpreting IRR results. Paraphrasing Richard Shockley, author of my favourite finance reference tex…
This Micro Tutorial will demonstrate in Google Sheets how to use the HYPERLINK function to create live links inside your spreadsheet.
This Micro Tutorial demonstrates in Microsoft Excel how to consolidate your marketing data by creating an interactive charts using form controls. This creates cool drop-downs for viewers of your chart to choose from.

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

18 Experts available now in Live!

Get 1:1 Help Now