<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:p="urn:schemas-microsoft-com:office:powerpoint" xmlns:a="urn:schemas-microsoft-com:office:access" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" xmlns:b="urn:schemas-microsoft-com:office:publisher" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc="urn:schemas-microsoft-com:office:odc" xmlns:oa="urn:schemas-microsoft-com:office:activation" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" xmlns:Repl="http://schemas.microsoft.com/repl/" xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda="http://www.passport.com/NameSpace.xsd" xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc="http://schemas.microsoft.com/data/udc" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec="http://www.w3.org/2001/04/xmlenc#" xmlns:sp="http://schemas.microsoft.com/sharepoint/" xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf="http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss="http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:dssi="http://schemas.microsoft.com/office/2006/digsig" xmlns:mdssi="http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:mver="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:mrels="http://schemas.openxmlformats.org/package/2006/relationships" xmlns:spwp="http://microsoft.com/sharepoint/webpartpages" xmlns:ex12t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ex12m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:pptsl="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:spsl="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" xmlns:Z="urn:schemas-microsoft-com:" xmlns:st="" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#993366;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Maybe
it’s just me, but “A doesn’t equal B” surely reads more
closely to the <i>real meaning</i> than “not (A does equal B)”.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Apart
from anything else, the latter <b>requires</b> 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).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>From
a human perspective the scanning is more fluid: A <> B, reads left
to right entirely as intended: “A does not equal B”.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>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.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>In
other words, exactly what is menat literally and clearly when I write… A
<> B.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>But
as I say, maybe it’s just me.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>NOT
(I think like a computer).<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>;)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#993366'><o:p> </o:p></span></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
delphi-bounces@delphi.org.nz [mailto:delphi-bounces@delphi.org.nz] <b>On Behalf
Of </b>David O'Brien<br>
<b>Sent:</b> Tuesday, 27 April 2010 11:54 a.m.<br>
<b>To:</b> NZ Borland Developers Group - Delphi List<br>
<b>Subject:</b> Re: [DUG] Enable CheckBox<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-NZ style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Mainly because it makes me think about the real meaning when
looking at the code again </span><span lang=EN-NZ style='font-size:11.0pt;
font-family:Wingdings;color:#1F497D'>J</span><span lang=EN-NZ style='font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-NZ style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
delphi-bounces@delphi.org.nz [mailto:delphi-bounces@delphi.org.nz] <b>On Behalf
Of </b>Colin Johnsun<br>
<b>Sent:</b> Tuesday, 27 April 2010 11:47 a.m.<br>
<b>To:</b> NZ Borland Developers Group - Delphi List<br>
<b>Subject:</b> Re: [DUG] Enable CheckBox<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-NZ><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-NZ>I like David's version but why not get rid
of the "not" to:<o:p></o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-NZ><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-NZ>DBCheckBox4.Enabled := DBEdit2.Text
<> '';<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-NZ><o:p> </o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-NZ>Cheers,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-NZ><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-NZ><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-NZ>On 27 April 2010 09:40, Ian Drower <<a
href="mailto:idrower@gmail.com">idrower@gmail.com</a>> wrote:<o:p></o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-NZ>Hi Bob<br>
I'd use <br>
if DBEdit2.Text <> '' then<br>
DBCheckBox4.Enabled := true<br>
else<br>
DBCheckBox4.Enabled := false<br>
<br>
Ian<o:p></o:p></span></p>
<div>
<div>
<p class=MsoNormal><span lang=EN-NZ><br>
<br>
<br>
On 27/04/2010 10:52 a.m., David O'Brien wrote: <o:p></o:p></span></p>
</div>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:11.0pt;color:#1F497D'>Why the four quotes in the
false and a space in the true?</span><span lang=EN-NZ><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:11.0pt;color:#1F497D'> </span><span
lang=EN-NZ><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:11.0pt;color:#1F497D'>I would use something like:</span><span
lang=EN-NZ><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:11.0pt;color:#1F497D'> </span><span
lang=EN-NZ><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>DBCheckBox4.Enabled := not (DBEdit2.Text =
'') ;</span><span lang=EN-NZ><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:11.0pt;color:#1F497D'> </span><span
lang=EN-NZ><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0cm 0cm 0cm;
border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='font-size:10.0pt'>From:</span></b><span style='font-size:10.0pt'> <a
href="mailto:delphi-bounces@delphi.org.nz" target="_blank">delphi-bounces@delphi.org.nz</a>
[<a href="mailto:delphi-bounces@delphi.org.nz" target="_blank">mailto:delphi-bounces@delphi.org.nz</a>]
<b>On Behalf Of </b>Bob Pawley<br>
<b>Sent:</b> Tuesday, 27 April 2010 10:39 a.m.<br>
<b>To:</b> NZ Borland Developers Group - Delphi List<br>
<b>Subject:</b> [DUG] Enable CheckBox</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>Hi</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>I am attempting to enable a checkbox only
when a DBEdit has a value. (Disabled when no string in DBEdit.)</span><span
lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>Following is my code which disables the
CheckBox after a delete from the DBEdit.</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>But it is not enabled when I add a string
to the DBEdit.</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>------</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>procedure TForm4.DBEdit2Change(Sender:
TObject);<br>
begin</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'> if<br>
DBEdit2.Text = ' '</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'> then<br>
DBCheckBox4.Enabled := True</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'> Else if DBEdit2.Text = ''''</span><span
lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'> then<br>
DBCheckBox4.Enabled := False ;</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>end;</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>Thanks for any help.</span><span
lang=EN-NZ><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-NZ style='font-size:10.0pt'>Bob</span><span lang=EN-NZ><o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<pre><span lang=EN-NZ><o:p> </o:p></span></pre><pre><span lang=EN-NZ>_______________________________________________<o:p></o:p></span></pre><pre><span
lang=EN-NZ>NZ Borland Developers Group - Delphi mailing list<o:p></o:p></span></pre><pre><span
lang=EN-NZ>Post: <a href="mailto:delphi@delphi.org.nz" target="_blank">delphi@delphi.org.nz</a><o:p></o:p></span></pre><pre><span
lang=EN-NZ>Admin: <a href="http://delphi.org.nz/mailman/listinfo/delphi"
target="_blank">http://delphi.org.nz/mailman/listinfo/delphi</a><o:p></o:p></span></pre><pre><span
lang=EN-NZ>Unsubscribe: send an email to <a
href="mailto:delphi-request@delphi.org.nz" target="_blank">delphi-request@delphi.org.nz</a> with Subject: unsubscribe<o:p></o:p></span></pre></blockquote>
<p class=MsoNormal><span lang=EN-NZ><o:p> </o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-NZ><br>
_______________________________________________<br>
NZ Borland Developers Group - Delphi mailing list<br>
Post: <a href="mailto:delphi@delphi.org.nz">delphi@delphi.org.nz</a><br>
Admin: <a href="http://delphi.org.nz/mailman/listinfo/delphi" target="_blank">http://delphi.org.nz/mailman/listinfo/delphi</a><br>
Unsubscribe: send an email to <a href="mailto:delphi-request@delphi.org.nz">delphi-request@delphi.org.nz</a>
with Subject: unsubscribe<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-NZ><o:p> </o:p></span></p>
</div>
</div>
</div>
</div>
</body>
</html>