The Wiert Corner – irregular stream of stuff

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

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Archive for April, 2019

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Woes from last year: While checking in to @plasticscm server and having a branch selected in the PlasticSCM GUI: Error — No checkout branch found.

Posted by jpluimers on 2019/04/03

I bumped into a similar situation again, and my conclusion is that getting out of PlasticSCM woes is more cumbersome to me than getting out of similar git woes.

[WayBack] Jeroen Pluimers on Twitter: “While checking in to @plasticscm server and having a branch selected in the PlasticSCM GUI: ————————— Error ————————— No checkout branch found. ————————— OK —————————… https://t.co/k13K06mOFX”

Basically

---------------------------
Error
---------------------------
No checkout branch found.
---------------------------
OK   
---------------------------

is the Plastic GUI way of saying “I think you have checked out branch A, but while checking that one in, I could not find it on the server, could it be that it got renamed or deleted?”.

The way to reliably get out of this situation (even if you are in a merge):

  1. Make a full backup of your directory tree (robocopy /mir is your friend here)
  2. Keep a note of your check-in comment
  3. Undo your changes in the current branch
  4. Checkout a branch that never got renamed
  5. Quit the Plastic GUI
  6. Start the Plastic GUI
  7. Checkout the branch you want to apply your changes on
  8. Use Beyond Compare to compare the backup tree and the current checked out tree
  9. Sync anything changed using Beyond Compare
  10. Checkin the changes in PlasticSCM using the saved check-in comment

–jeroen

PS, the Twitter thread:

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Posted in Development, PlasticSCM, Software Development, Source Code Management | Leave a Comment »

paulcbetts/refit: The automatic type-safe REST library for Xamarin and .NET

Posted by jpluimers on 2019/04/03

This is so cool: [WayBack] paulcbetts/refit: The automatic type-safe REST library for Xamarin and .NET. It’s  inspired by Square’s [WayBack] Retrofit library which does the same for Java.

They basically allow you to use attributes on interfaces to define a type-safe wrapper around any REST interface, then instantiate a connection to it for making calls.

No more manual HttpClient fiddling!

Since it requires only .NET 1.4, you can basically run it on any platform as it’s supported covered by the implementations .NET Core, Mono and the full .NET Framework.

Quite a lot of projects already use it; I got there via the first link:

–jeroen

Via: [WayBack] Exploring refit, an automatic type-safe REST library for .NET Standard https://www.hanselman.com/blog/ExploringRefit… – Jeroen Wiert Pluimers – Google+

Posted in .NET, C#, Development, Java, Java Platform, Software Development | Leave a Comment »

Delphi, attributes, RTTI and the IDE

Posted by jpluimers on 2019/04/03

Reminder to self: [WayBack] It took me a while to address an awful IDE crash issue. If you install a design time package which uses RTTI to populate custom attributes declared in… – Baoquan Zuo – Google+

TL;DR: be very careful using the built-in RTTI support objects as when they refer to custom defined attributes in packages, and the packages get unloaded, the cache does not get flushed.

Bug: RSP-11620: IDE crashes when rebuilding a project group that contains a component with customattribute

–jeroen

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

Far less active on blog on social media: some personal things that need to be done.

Posted by jpluimers on 2019/04/03

Some people already noticed me being far less active on social media including this blog.

This will continue for a while, as I am supporting two people that are very dear to me.

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Posted in About, Personal | Leave a Comment »

Friends+Me Google+ Exporter Support

Posted by jpluimers on 2019/04/02

https://www.reddit.com/r/FMGE_Support/

Posted in Uncategorized | Leave a Comment »

Some links on DUnit, JUnit and NUnit XSD specifications of their XML formats (JUnit is actually Ant XML)

Posted by jpluimers on 2019/04/02

For my link archive:

–jeroen

Posted in Agile, Development, Software Development, Unit Testing | Leave a Comment »

architecture – How much is too much Dependency Injection? – Software Engineering Stack Exchange

Posted by jpluimers on 2019/04/02

Mark Seeman posted a great answer with insights into how to architect applications: [WayBack] architecture – How much is too much Dependency Injection? – Software Engineering Stack Exchange

Some topics covered:

  • small code bases
  • pure DI over DI container
  • cases for both coarse and fine-grained DI
  • favour functional programming over OOP
  • both functional and DI ports and adapters

It links to a ton of other good reads for a quiet long weekend as well:

–jeroen

via: [WayBack] Favour Pure DI – Linas Naginionis – Google+

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

Interface methods are not assignment compatible with method references or methods of object.

Posted by jpluimers on 2019/04/02

Boy I wish that QC was still up and QualityPortal was publicly indexable as that would have saved me quite a bit of time tracking this down. Luckily I got help from Stefan Glienke (who maintains the awesome Spring4D library based on modern Delphi compiler support) when I mentioned

How good are you with reference to function?
I’ve an odd compiler thing throwing errors when using interfaces but not with classes.

So, for posterity:

Unlike C#, in Delphi interface methods are not compatible with method references or methods of object.

This has many manifestations, which means you can get a variety of compiler errors. I’ve listed the ones I could find below, but presume there are more and if I find more will update this post.

These are the errors you can get:

  • E2010 Incompatible types: ‘T’ and ‘Procedure’
  • E2035 Not enough actual parameters
  • E2250 There is no overloaded version of ‘FirstOrDefault’ that can be called with these arguments

These are the (now defunct, but used to be publicly accessible) QC and QualityPortal (needs sign on) entries (thanks Stefan Glienke and Blaise Thorn for reporting these):

The really frustrating part is that the RSP is marked as “new feature” whereas clearly it isn’t, so it probably never will be fixed.

A workaround for now is to wrap the interface method references with:

  • either anonymous methods (when you have just a few classes to cover, but maybe more than a few methods on the interface)
  • or instance methods on a class (when there are many classes to cover and preferably few methods on the interface)

Examples are in the code below that also shows this works fine and dandy in C#.

–jeroen

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Posted in Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi 10.2 Tokyo (Godzilla), Delphi XE3, Delphi XE4, Delphi XE5, Delphi XE6, Delphi XE7, Delphi XE8, Development, Software Development, Spring4D | Leave a Comment »

Google Local Guides Nederland after G+

Posted by jpluimers on 2019/04/02

For my information archive as G+ died:

From the (unarchived, but disappeared) Is er al iemand een slack kanaal gestart waar we als localguides heen kunnen?

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Posted in Google, GoogleMaps, Local Guides, Power User | Leave a Comment »

Requirements to write multi threaded code

Posted by jpluimers on 2019/04/01

Steps:

  1. get gist.github.com – Developers must be this tall to write multi threaded code
  2. render to PNG/PDF/HTML
  3. print
  4. attach to wall

Via [WayBack] Kristian Köhntopp – Google+

Related:

Bernd Paysan’s:

The three most 2. common race
1. off-by-one software conditions
errors:
counting
core dumped (Segmentation fault in printf)

–jeroen

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Posted in Development, Fun, Multi-Threading / Concurrency, Software Development | Leave a Comment »

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