The Wiert Corner – irregular stream of stuff

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

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Archive for the ‘Development’ Category

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When pandoc on a reStructuredText document gives “(WARNING/2) Inline substitution_reference start-string without end-string.”

Posted by jpluimers on 2020/04/22

When fixing some of the Pandoc conversion messages from … to html, I got this warning:

Network-Protocol-Security.rst:917: (WARNING/2) Inline substitution_reference start-string without end-string.

In my experience, the line numbers do not usually match, but in this case it was accurate (not the same as Network-Protocol-Security.rst#L874 because I was still editing it).

A search for “Inline substitution_reference start-string without end-string.” did only reveal occurrences, not causes, but “Inline substitution_reference start-string without end-string”

showed post with a cause: [WayBack] python sphinx – How to include an internal reference in a code block? – Stack Overflow pointing to [WayBack] reStructuredText Markup Specification: Substitution References.

Solution is either to

  • Escape |_ using a backslash like \|-.
  • Properly format code blocks using :: at the front and indents of the block

Lessons learned:

  1. When you get a pandoc message like substitution_reference, then search for it while substituting the underscore with a space inside the [WayBack] reStructuredText Markup Specification.
  2. Quoted strings to trim down Google search results, but you might want to leave out trailing punctuation.

Applying the lessons

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Posted in Development, Lightweight markup language, reStructuredText, Software Development | Leave a Comment »

Peter Drucker: The Rules of Effectiveness – Personal Growth – Medium

Posted by jpluimers on 2020/04/22

This is so simple and so hard at the same time: [WayBack] Peter Drucker: The Rules of Effectiveness – Personal Growth – Medium:

  1. Design the Practice, Not the Person
    This means you have to set schedules when to do things and for how long.
    This is hard in an ever changing, ever interrupting world where tasks are of tough to estimate duration.
  2. Embrace Purposeful Abandonment
    Less+Less==More; which implies you should do a lot less things to be effective. Skip the things you do not really need.
  3. Switch From Exploring to Exploiting
    For me it was hard to understand, especially not being in my 20ies any more for a long time: high reward risky paths are better to be pursued than risk-averse paths.

The cool thing though: Peter Drucker found about all these during his life which was mostly (1909-2005) before computing and social network became ubiquitous.

So yes: the above should be possible in an agile environment.

–jeroen

via: [WayBack] Peter Drucker: The Rules of Effectiveness – Personal Growth – Medium – Marjan Venema – Google+

Posted in Agile, Development, LifeHacker, Software Development | Leave a Comment »

Kelly Sommers on Twitter: “What are some good open ended questions to ask developers or testers in interviews to get them talking?”

Posted by jpluimers on 2020/04/21

Interesting thread: [WayBack] Kelly Sommers on Twitter: “What are some good open ended questions to ask developers or testers in interviews to get them talking?”

–jeroen

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Posted in Development, Software Development | Leave a Comment »

reStructuredText – document title and subtitle

Posted by jpluimers on 2020/04/21

Always watch how you format your reStructuredText sections: [WayBack] Docutils FAQ: 2.6 How can I indicate the document title? Subtitle?

That is why I have these comments at the top of most of my documents:

.. $ %
.. # * = + ^ ~ - : . _ ` ' "

The first two are the document title and subtitle marks, the others the level 1 through 13.

–jeroen

Posted in Development, Lightweight markup language, Power User, reStructuredText | Leave a Comment »

Is there no shortcut in the IDE for Quick Edit?

Posted by jpluimers on 2020/04/21

I hope this feature gets added: [WayBack] Is there no shortcut in the IDE for Quick Edit? – Reinier Sterkenburg – Google+.

The thread evolved into a few posts about failing keyboard handling (including Shift-F10) which has been failing for a long time and known to the development team for almost that time.

Hopefully things like that get fixed one day as well.

–jeroen

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

Passing parameters to a Bash function – Stack Overflow

Posted by jpluimers on 2020/04/20

Since I tend to forget this:

  1. you can declare bash functions with parenthesis
  2. you pass parameters to functions space delimited (often people quote each parameter)
  3. within functions you can refer to parameters by number just like the parameters passed to a shell script

More info at:

I think for functions, you can apply what is linked from Some useful links on bash parameters: $1, $*, $@, quotes, etc., so a loop over all parameters in a function is the same as in a script, see [WayBack] shell – how to loop through arguments in a bash script – Unix & Linux Stack Exchange from Gilles:

There’s a special syntax for this:

for i do
  echo "$i"
done

More generally, the list of parameters of the current script or function is available through the special variable $@.

for i in "$@"; do
  echo "$i"
done

Note that you need the double quotes around $@, otherwise the parameters undergo wildcard expansion and field splitting. "$@" is magic: despite the double quotes, it expands into as many fields as there are parameters.

print_arguments () {
  for i in "$@"; do echo "$i"; done
}
print_arguments 'hello world' '*' 'special   !\characters'    # prints 3 lines
print_arguments ''                                            # prints one empty line
print_arguments                                               # prints nothing
 –jeroen

Posted in bash, Development, Scripting, Software Development | Leave a Comment »

Zelfbouw verlichting aansturen via Hue – Duurzame Energie & Domotica – GoT

Posted by jpluimers on 2020/04/16

On my research list: [WayBack] Zelfbouw verlichting aansturen via Hue – Duurzame Energie & Domotica – GoT.

via: [WayBack] Tweakers: Ikea komt met leddriver om geïntegreerde verlichting ‘slim’ te maken

–jeroen

 

PS: Lampen van de Action werken ook prima via Tuya. Met Google nest.

Posted in Development, Hardware Development | Leave a Comment »

LBS008AE and LBS005AE-R2, 10-100 Switches USB powered – Black Box

Posted by jpluimers on 2020/04/16

These are cool devices: the [WayBack] LBS008AE and LBS005AE-R2, 10-100 Switches USB powered – Black Box.

Both are the size of a Raspberry Pi and USB powered.

The first is 8-port, the second 5-port. Ideal for a stack of Pis.

There are 5V powered 8-port Gigabyte switches from other vendors as well at around `1A (effectively using ~5W), but they are bigger.

Via: [WayBack] How to Build a Kubernetes Cluster with ARM Raspberry Pi then run .NET Core on OpenFaas – Scott Hanselman

–jeroen

Posted in Development, Hardware Development, Power User, Raspberry Pi | Leave a Comment »

sed double expression: match, replace in one line, overwrite file

Posted by jpluimers on 2020/04/15

A while ago, I needed to conditionally replace in files, so I used sed and a regular expression, though usually I dislike those.

However, since the system had a very basic install, there was not much choice.

Luckily back then, my Google foo returned these:

This allowed me to do a double expression (the first matches a pattern, the second performs the actual replacement within the matching lines).

In case my Google foo in the future fails:

## https://robots.thoughtbot.com/sed-102-replace-in-place
## -i causes no backup to be saved, but does in-place replacement
## since we run under git, we can always restore
## combined with a double expression (the first matches, the second executes) this is very powerful
sed -i -e '/#.*AVOID_DAILY_AUTOCOMMITS=.*$/s/^.//' /etc/etckeeper/etckeeper.conf && git diff | more

–jeroen

Posted in *nix, Development, etckeeper, Linux, Power User, RegEx, Software Development | Leave a Comment »

GitHub – JensBorrisholt/GoogleSpeak: This repository demonstrates how to Use Google for implementing Text to Speech. You’ll find both a Delphi version and a C# version

Posted by jpluimers on 2020/04/15

For my link archive, as I will likely need this one day: [WayBack] GitHub – JensBorrisholt/GoogleSpeak: This repository demonstrates how to Use Google for implementing Text to Speech. You’ll find both a Delphi version and a C# version

–jeroen

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

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