The Wiert Corner – irregular stream of stuff

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

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Archive for October, 2018

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Ralph Johnson: 22 years of design patterns – YouTube video of lecture

Posted by jpluimers on 2018/10/25

via [WayBack] Ralph Johnson: 22 years of design patterns. I thought you might find this interestinghttps://youtu.be/jhPLFLcxslM – Agustin Ortu – Google+ the below video.

Ralph Johnson is one of the Gang of Four: the authors of the famous Design Patterns: Elements of Reusable Object-Oriented Software book published October 21, 1994 and copyrighted 1995.

Google translated lecture announcement, slightly edited:

Ralph Johnson is world renowned for his high impact contributions to Software Engineering, particularly Object Orientation. His book “Design Patterns” has been best-selling in the history of computing (more than 500,000 copies sold in English and in translations into 13 languages). From his research group also emerged the first works on frameworks, patterns and refactoring. His students also created the first refactoring tool, the Smalltalk Refactoring Browser, on whose architecture all the refactoring tools of today are based.

His talk, “Twenty Years of Design Patterns,” will talk about the evolution of software patterns since its inception in 1994. Some have become common, and others have not. Some patterns have changed. Ralph Johnson will talk about several of the patterns that are more widely known, with a renewed understanding of what the book “Design Patterns” should have said.

Ralph moved from the Department of Computer Science at the University of Illinois to COO of Metaficient and many of his history is only at the WayBack machine, so here are some links to it:

  • Ralph Johnson: The Refactory is dedicated to helping organizations succeed with objects and design patterns. Principals include Ralph Johnson, an original member of the Gang of Four patterns.
  • Former Ralph E. Johnson homepage at the University of Illinois
  • Metaficient Management Team
  • 2016: 25 years of OOP Konferenz 2016 – Ralph Johnson
  • Ralph Johnson on Parallel Programming Patterns: Ralph Johnson, one of the four GoF authors, talks about the upcoming book “The Patterns for Parallel Programming”. He highlights the difficulties in dealing with discovering and writing down parallel programming patterns, how to choose and use such a pattern, and similarities with the initial Design Patterns book.
  • A Pattern Language for Parallel Programming: Ralph Johnson presents a pattern language that he and his colleagues are working on in an attempt to solve the hard issues of parallel programming through a set of design patterns: Structural Patterns, Computational Patterns, Parallel Algorithm Strategy Patterns, Implementation Strategy Patterns, and Concurrent Execution Patterns.

–jeroen

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Posted in Design Patterns, Development, Software Development | Leave a Comment »

Why I wish QC had been archived in full…

Posted by jpluimers on 2018/10/25

A quick search later and it seems I’m bumping into [WayBack] http://qc.embarcadero.com/wc/qcmain.aspx?d=125403 (the version I’m bugfixing is built using XE6).

The workaround listed (in my case blanking indexfieldnames in OnBeforeClose) works.

Now… imagine if this had been filed to QualityPortal instead.

I would have had to remember to search it, and maybe wouldn’t have found it as Google does fuzzy searches very well.

And due to the lower visibility it likely would have fewer comments as well…

So yeah EMB/Idera, please revisit the choice of walling up QualityPortal.

Source: [WayBack] So I just hit a weird issue in our program. A quick search later and it seems I’m bumping into this http://qc.embarcadero.com/wc/qcmain.aspx?d=125403… imagine if it had been in QualityPortal… – Asbjørn Heid – Google+

–jeroen

 

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

Finding your program with an “Access Denied” (Error code 5) after lunch break…

Posted by jpluimers on 2018/10/24

Via: [WayBack] I just returned from lunch break and found my program faulted with an “Access Denied” (Error code 5) error in a call to Mouse.GetCoursorPos and was wond… – Thomas Mueller (dummzeuch) – Google+:

All of [WayBack] GetCursorPos, [WayBack] GetCursorInfo and [WayBack] GetKeyState can cause an “Access Denied” (Error code 5) when they do not have permission for the current desktop (for instance the logon desktop when a screen-saver has kicked in).

Solution: write a wrapper around it then [WayBack] patch calls going to the original into the patch [WayBack] delphi – Explain errors from GetKeyState / GetCursorPos – Stack Overflow

–jeroen

Posted in .NET, C#, C++, Delphi, Development, Software Development, Windows Development | Leave a Comment »

Delphi: uninstalling the ancient CollabNet 1.7.5 version

Posted by jpluimers on 2018/10/24

Somehow the integration team at Embarcadero still hasn’t discovered there are [WayBack] newer CollabNet SVN Client versions than 1.7.5 which has been shipped since Delphi XE3 until Delphi XE6. The newer version (currently 1.8.8 when writing this, now 1.10.2 in 2018) have plenty [WayBack1/WayBack2] SVN security issues fixed.

The easiest way to uninstall the CollabNet SVN Client is running this small script:


call :start %ProgramFiles%
call :start %ProgramFiles(x86)%
goto :end
:start
startlocal
set CollabNet="%*\CollabNet\uninst.exe"
echo %CollabNet%
if exist %CollabNet% start "CollabNet uninstall" %CollabNet%
endlocal
goto :end
:end

view raw

uninstall-CollabNet-Subversion-Client-SVN.bat

hosted with ❤ by GitHub

Then install the [WayBack] Slik SVN client. Like [WayBack] Јοеу, I’ve switched to [WayBack] Slik SVN a long ago. Here is [WayBack] his reasoning:

I have long since stopped using the CollabNet-branded version because it’s behind a registration wall. I found Slik SVN as a good alternative. It’s exactly the same command-line client you get from CollabNet, sans the hassle in downloading it.

I hope someone at Embarcadero enters this in QC^w QualityPortal as I’m awaiting Embarcadero response about a security issue there.

–jeroen

Posted in Delphi, Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Development, QC, Software Development, Source Code Management, Subversion/SVN | 2 Comments »

Jonathan Nelson on Twitter: “toilet paper visualization of the difference between zero and null https://t.co/ku3BBRjjUY”

Posted by jpluimers on 2018/10/24

toilet paper visualization of the difference between zero and null

The thread has a few others as well:

  • NaN
  • Public versus private

Sources:

Via: [WayBack] Difference between 0 and null – CodeProject – Google+

–jeroen

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

Delphi Rio “new overall direction of removing ARC”

Posted by jpluimers on 2018/10/23

Finally: “new overall direction of removing ARC” for Delphi 10.3 Rio and later.

Via [WayBack] Delphi Rio – New IDE Configuration with Search Box – New compiler dialog – Improve code completion – Inline variables – Rafael Dipold – Google+

Hopefully zero-based strings are the next to go…

Related: [WayBack] Directions for ARC Memory Management in Delphi

–jeroen

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Posted in Delphi, Development, Software Development | 11 Comments »

Hunting for Beyond Compare on your system: bc.bat

Posted by jpluimers on 2018/10/23

For my archive bc.bat it finds Beyond Compare, then starts it with the given command line parameters. It prefers version 4 over version 3 and user settings over system settings:

:begin
@echo off
  setlocal
  IF /I %PROCESSOR_ARCHITECTURE% == amd64 goto :x64
  IF /I %PROCESSOR_ARCHITEW6432% == amd64 goto :x64
  goto :x86
:x64
  :: OS is 64bit
  set hkcuBaseKey=HKEY_CURRENT_USER\Software\Scooter Software\Beyond Compare
  set hklmBaseKey=HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Scooter Software\Beyond Compare
  
  goto :findBC
:x86
  :: OS is 32bit
  set hkcuBaseKey=HKEY_CURRENT_USER\Software\Scooter Software\Beyond Compare
  set hklmBaseKey=HKEY_LOCAL_MACHINE\SOFTWARE\Scooter Software\Beyond Compare
  goto :findBC
:findBC
  :: https://gist.github.com/rojepp/634908
  :: http://stackoverflow.com/questions/5369528/windows-batch-reg-query-key-value-to-a-variable-but-do-not-display-error-if-key
  set SupportedBeyondCompareVersions=3, 4
  for %%v in (%SupportedBeyondCompareVersions%) do (
    for /f "usebackq tokens=2* delims= " %%c in (`reg query "%hkcuBaseKey% %%v" /v ExePath 2^>NUL`) do (
      call :do set bcExe="%%d"
    )
  )
  if not [%bcExe%]==[] goto :foundBC
    for /f "usebackq tokens=2* delims= " %%c in (`reg query "%hkcuBaseKey%" /v ExePath 2^>NUL`) do (
      call :do set bcExe="%%d"
    )
  if not [%bcExe%]==[] goto :foundBC
  for %%v in (%SupportedBeyondCompareVersions%) do (
    for /f "usebackq tokens=2* delims= " %%c in (`reg query "%hklmBaseKey% %%v" /v ExePath 2^>NUL`) do (
      call :do set bcExe="%%d"
    )
  )
  if not [%bcExe%]==[] goto :foundBC
    for /f "usebackq tokens=2* delims= " %%c in (`reg query "%hklmBaseKey%" /v ExePath 2^>NUL`) do (
      call :do set bcExe="%%d"
    )
:foundBC
  if [%bcExe%]==[] ( echo no bc.exe found in registry) else (
    echo bcExe=%bcExe%
    if exist %bcExe% start "Beyond Compare" %bcExe% %*
    if not exist %bcExe% echo not found: [%bcExe%]
  )
:exit
  endlocal
:end
  goto :eof
:do
  ::echo %*
  call %*
  goto :eof

–jeroen

Posted in Batch-Files, Beyond Compare, Development, Power User, Scripting, Software Development | Leave a Comment »

DIY Filament Sensor for your 3D Printer

Posted by jpluimers on 2018/10/23

Via:

–jeroen

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Posted in 3D printing, Development, Hardware Development, LifeHacker | Leave a Comment »

G+ thread: Do i need to create one TFormatSettings instance for every thread?

Posted by jpluimers on 2018/10/23

A very interesting thread at [WayBack] Do i need to create one TFormatSettings instance for each thread that needs it? If i want the same settings (for all threads), th… – Dany Marmur – Google+

It’s about:

Recommended reading!

It made me go back to these style guides (from oldest to newest):

And Stefan Glienke reminded me naming is always hard, so I found back these from a distant past:

Note most of the above Links point to (archives of) Delphi 2007 documentation as the behaviour is that old and that the below identifiers  were not mentioned in the thread.

The FormatSettings variable was introduced in Delphi XE but only documented in XE2 and up.

Until that, other global variables like the [WayBack] SysUtils.DecimalSeparator Variable were used.

–jeroen

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Posted in Delphi, Development, internatiolanization (i18n) and localization (l10), Software Development | Leave a Comment »

Ole Albers: Just wanted to tell that the Google+ Optimizer now has a cross post to Diaspora…

Posted by jpluimers on 2018/10/23

Cool: [WayBack] Just wanted to tell that the Google+ Optimizer now has a cross post to Diaspora – Feature…. – Ole Albers – Google+.

Get it from [WayBack] Ghosttown – Optimizer – Chrome Web Store

The Google+ – Optimizer increases the user experience with Google+ until the bitter end…
With this extension you can modify and arrange your google+ stream just like you want.

Some of the Features:
* Remove unwanted content ("suggested contacts, youtube-comments,animated gifs...)
* Display additional content (stopwatch)
* Filter by Hashtag
* Autosave-Feature
* Bookmark-Feature
... and more

The first time you open a page on plus.google.com, you see this:

Then when you post a removable information bar:

That directs you to the configuration (either right click the icon, or follow http://hurz.me/gplusoptimizer), where in the main item, you can enter your diaspora host (in my case pluspora) information:

–jeroen

Posted in Chrome, G+: GooglePlus, Google, Power User, SocialMedia | Leave a Comment »

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