[DUG] Enable CheckBox

[Bob Pawley]

Hi

The following works well and it is simple enough that I can almost understand it.

Thanks everyone.

Bob

if DBEdit2.Text <> '' then
DBCheckBox4.Enabled := true
else
DBCheckBox4.Enabled := false
  ----- Original Message ----- 
  From: Colin Johnsun 
  To: NZ Borland Developers Group - Delphi List 
  Sent: Monday, April 26, 2010 5:53 PM
  Subject: Re: [DUG] Enable CheckBox


  Yeah, that was my thinking on the topic too! But you said it much better :)


  BTW, I'm wondering if Bob, the originator of this thread, wants to chime in and let us know if any of these suggestions helped or not.


  On 27 April 2010 10:34, Jolyon Smith <jsmith at deltics.co.nz> wrote:

    Maybe it’s just me, but “A doesn’t equal B” surely reads more closely to the real meaning than “not (A does equal B)”.



    Apart from anything else, the latter requires parentheses to avoid the compiler getting confused and trying to do : “(Not A) equals (B)”.  i.e. the latter syntax is also to the compiler less close to the real meaning (since it requires disambiguation).



    From a human perspective the scanning is more fluid:  A <> B, reads left to right entirely as intended:  “A does not equal B”.



    NOT (A = B) on the other hand requires me to read it like a syntax tree parser:  “NOT “ … (OK, store the fact that I have to logically invert what follows, keep a mental note of parentheses) … then what follows is “( A is equal to B )” , right OK, so “A is equal to B inverted”, i.e. A does not equal B.



    In other words, exactly what is menat literally and clearly when I write… A <> B.



    But as I say, maybe it’s just me.



    NOT (I think like a computer).



    ;)






------------------------------------------------------------------------------


  _______________________________________________
  NZ Borland Developers Group - Delphi mailing list
  Post: delphi at delphi.org.nz
  Admin: http://delphi.org.nz/mailman/listinfo/delphi
  Unsubscribe: send an email to delphi-request at delphi.org.nz with Subject: unsubscribe
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://listserver.123.net.nz/pipermail/delphi/attachments/20100427/6bc6825b/attachment.html