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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for April 16th, 2019

Delphi annoyance: in debug mode, no breakpoints are being adhered to, no blue bullets

Posted by jpluimers on 2019/04/16

For all Delphi Galileo versions (the BDS based Delphi versions: 8 until now), I have bumped into this annoyance:

Over time, while working on an application, running it in DEBUG mode in the debugger, wil not fire any breakpoints and all blue bullets (meaning the lines have code generated) are gone.

There are no warnings or (error) dialogs leading to this situation.

The only remedy is to quit Delphi, start it again, then do a full rebuild of the application.

Of course this happens more often with large applications than with small ones.

Is there anyone who has a reliable method to:

  • signal this before it happens
  • workaround it in a better way

–jeroen

Posted in Delphi, Development, Software Development | 1 Comment »

Lesson learned: do not copy/paste code from the `Visual` WordPress.com editor…

Posted by jpluimers on 2019/04/16

[WayBack] Lesson learned: do not copy/paste code from the Visual WordPress.com editor; copy from the Text editor or the Preview… – Jeroen Wiert Pluimers – Google+.

Note: likely the HTML below got rendered badly by WordPress.com, so the gist below has the same text as a MarkDown file.

Ever wonder why copy-pasting code from your WordPress.com post fails?

The first statement fails, but the second works:

[root@linux:/etc] # useradd --create-home --shell /bin/false autossh24
useradd: unrecognized option '--shell /bin/false'
...
[root@linux:/etc] # useradd --create-home --shell /bin/false autossh24
[root@linux:/etc] #

The reason is that the first is copied from the Visual WordPress.com editor that renders this HTML inserting   which is a different unicode characer (0x00A0) than a normal space (0x0020):

<blockquote><p><code data-mce-selected="1"># <strong>useradd --create-home --shell&nbsp;/bin/false autossh24</strong></code></p></blockquote>

However, the the second copied from the Text WordPress.com editor succeeds because it has all regular spaces:

<blockquote><code># <strong>useradd --create-home --shell /bin/false autossh24</strong></code></blockquote>

Luckily the Preview render is correct:

<blockquote><p><code># <strong>useradd --create-home --shell /bin/false autossh24</strong></code></p></blockquote>

Lesson learned: do not copy/paste code from the Visual WordPress.com editor; copy from the Text editor or the Preview.

–jeroen

[WayBack] Ever wonder why copy-pasting code from your WordPress.com post fails?

Read the rest of this entry »

Posted in Development, PHP, Scripting, SocialMedia, Software Development, Web Development, WordPress, WordPress | Leave a Comment »

delphi – IfThen(Assigned(Widget), Widget.Description, ‘No Widget’) doesn’t crash. Should it? – Stack Overflow

Posted by jpluimers on 2019/04/16

Very interesting question [WayBack] delphi – IfThen(Assigned(Widget), Widget.Description, ‘No Widget’) doesn’t crash. Should it? – Stack Overflow.

Three important things here:

  • depending on inlining and kind of arguments, function calls can evaluate their arguments one or multiple times
  • lacking formal language specification, you never know if a method will be inlined or not
  • function calls should not have side effects

Via another interesting discussion at [WayBack] Inline functions are not guaranteed to evaluate their arguments exactly once… – David Heffernan – Google+

–jeroen

Posted in Delphi, Development, Software Development | Leave a Comment »

 
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