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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Ten Commandments For Naming Your Code

Posted by jpluimers on 2020/06/23

Be clear, be consistent, don’t be clever, and follow these rules for naming your code.

[WayBack] Ten Commandments For Naming Your Code investigates these:

  1. Thou shalt be specific.
  2. Thou shalt not use unnecessary words.
  3. Thou shalt not use abbreviations.
  4. Thou shalt use the code’s primary human language.
  5. Thou shalt not make up words.
  6. Thou shalt not include type.
  7. Thou shalt only use non-obvious words if the meaning is obvious.
  8. Thou shalt prefer active voice.
  9. Thou shalt use consistent syntax.
  10. Thou shalt break these rules if necessary.

–jeroen

Posted in Conference Topics, Conferences, Development, Event, Software Development | Leave a Comment »

.NET Rocks: How do you do concurrency?

Posted by jpluimers on 2020/06/23

Since it was quite a while ago I wrote heavily concurrent code in .NET, I wanted to know about the starte of the art.

This pod cast and the book discussed in it helped a lot: [WayBack] How do you do concurrency? Carl and Richard talk to Riccardo Terrell about his book on Concurrency in .NET. https://www.manning.com/books/concurrency-i… – .NET Rocks! – Google+

Links referenced:

–jeroen

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

Git submodule inside of a submodule (nested submodules) – Stack Overflow

Posted by jpluimers on 2020/06/23

Not sure why yet, but with a nested pacapt git submodule inside another git submodule bash.aliases, when pulling bash.aliases it did pull the actual content of pacapt, only the reference.

I wanted this because this allowed me to abstract installation of common packages no matter if the system was using the apt-get, zypper, homebrew or other package managers. [WayBack] GitHub – icy/pacapt: An Arch’s pacman-like package manager for some Unices supports many in a coherent way (I’m way past the not-invented-here syndrome:[WayBack] linux – A universal bash script for installing with apt-get and yum – Stack Overflow).

A git pull --recurse-submodules failed.

Even executing git submodule update --init --recursive at the top-level did not get it.

Forcing a submodule to update after a shallow clone

I had to to inside the bash.aliases submodule and perform git submodule update --init <submoduleName>:

$ git submodule update --init pacapt
Submodule 'pacapt' (https://github.com/icy/pacapt.git) registered for path 'pacapt'
Cloning into '/home/jeroen_pluimers_com/bash.aliases/pacapt'...
Submodule path 'pacapt': checked out '31f43d901055e3c361dfbcefdf50231442da13de'

I got this workaround at [WayBack] Git submodule inside of a submodule (nested submodules) – Stack Overflow.

It might mean I need to read more deeply into these asgit submodule update --init --recursive might by now need to be git submodule update --init --recurse-submodules, but the docs are not clear on that:

Forcing a recursive clone including submodules

This worked out of the box on a Git > 2.13:

D:\Versioned\github.com\project-jedi>call git clone --recurse-submodules -j8 https://github.com/project-jedi/jcl.git
Cloning into 'jcl'...
remote: Enumerating objects: 79, done.
remote: Counting objects: 100% (79/79), done.
remote: Compressing objects: 100% (46/46), done.
Receiving objects: 100% (82053/82053), 78.7delta 33), pack-reused 81974 eceiving objects: 100% (82053/82053), 72.05 MiB | 7.14 MiB/s
9 MiB | 3.77 MiB/s, done.
Resolving deltas: 100% (65056/65056), done.
Checking out files: 100% (3461/3461), done.
Submodule 'jcl/source/include/jedi' (https://github.com/project-jedi/jedi.git) registered for path 'jcl/source/include/jedi'
Cloning into 'D:/Versioned/github.com/project-jedi/jcl/jcl/source/include/jedi'...
remote: Enumerating objects: 4, done.
remote: Counting objects: 100% (4/4), done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 379 (delta 0), reused 3 (delta 0), pack-reused 375
Receiving objects: 100% (379/379), 123.87 KiB | 568.00 KiB/s, done.
Resolving deltas: 100% (120/120), done.
Submodule path 'jcl/source/include/jedi': checked out 'd04f4d341051c1245c06c822468ea927073e26eb'

–jeroen

Posted in Development, DVCS - Distributed Version Control, git, Source Code Management | Leave a Comment »

tfs – How to retrieve the hash for the current commit in Git? – Stack Overflow

Posted by jpluimers on 2020/06/18

Based on [WayBack] tfs – How to retrieve the hash for the current commit in Git? – Stack Overflow

Get current hash:

git rev-parse HEAD

Show summary of current commit, including hash:

git show --summary

Show all hashes of all branches (both in heads and in remotes) and tags:

git show-ref

Get current hash with a * marking if it is dirty:

git describe --always --abbrev=0 --match "NOT A TAG" --dirty="*"

The last one was [WayBack] answered by [WayBack] Rado:

display the full sha1 of the commit, but append an asterisk to the end if the working directory is not clean. …

Here is the one liner that does:
git describe --always --abbrev=0 --match "NOT A TAG" --dirty="*"
Result: f5366ccb21588c0d7a5f7d9fa1d3f85e9f9d1ffe*

Explanation: describes (using annotated tags) the current commit, but only with tags containing “NOT A TAG”. Since tags cannot have spaces, this never matches a tag and since we want to show a result --always, the command falls back displaying the full (--abbrev=0) sha1 of the commit and it appends an asterisk if the working directory is --dirty.

–jeroen

Posted in Development, DVCS - Distributed Version Control, git, Software Development, Source Code Management | Leave a Comment »

Delphi Exception handling code review reminders

Posted by jpluimers on 2020/06/18

I bumped into [WayBack]When an exception is nil in the exception handler – twm’s blog for some legacy code a while ago.

Some code review reminders:

  • raise Exception( is always wrong: no exception instance is created
  • Exception.Create( without a raise is wrong most of the times
  • except end is almost always wrong
  • except and finally in encompassing blocks often is a code smell

I need to check which ones are caught by [WayBack] Code Analysis Tool | FixInsight for Delphi (which is now at [WayBack] TMS Software | VCL, FMX, ASP.NET, .NET controls & components for Delphi, C++Builder & Visual Studio | TMS FixInsight Pro.)

--jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | Leave a Comment »

Lisette Sutherland: Work Together Anywhere | Lisette Sutherland | TEDxKaunas

Posted by jpluimers on 2020/06/18

[WayBack] TEDx Kaunas, 19 November 2017 – Lisette Sutherland:

“Remote workers aren’t trying to escape doing work. We’re trying to escape the Day Prison. We want to use technology to make better use of our time. We want to spend more time on things that matter to us and less time stuck in traffic.“

The site has the original transcript on the below video: Work Together Anywhere | Lisette Sutherland | TEDxKaunas.

Via: [WayBack] “People think that they want to be in the same place. But what they really want is fast communication” – Work Together Anywhere | Lisette Sutherland … – Marjan Venema – Google+

–jeroen

Read the rest of this entry »

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

Chr equivalent for Unicode in Delphi 7 – Stack Overflow

Posted by jpluimers on 2020/06/17

From a long time ago: [WayBack] chr equivalent for Unicode in Delphi 7 – Stack Overflow answered by David Heffernan:

Q

I need to initialize a Widestring in Delphi 7 but I can’t use chrfunction which is ANSI

var
  ws : Widestring;
begin

 ws := chr($FFFF) + chr($FFFF) + chr($FFFF);

end;

What can I use, then ?

A

I’m not sure there’s a simply way to do what you wish. You can convert a Word into a WideChar with a simple cast:

WideChar($FFFF)

but you cannot concatenate WideChar. So this is a compiler error:

WideChar($FFFF) + WideChar($FFFF)

You could use a helper function to get the job done:

function InitialiseWideString(const chars: array of Word): WideString;
var
  i: Integer;
begin
  SetLength(Result, Length(chars));
  for i := 0 to high(chars) do
    Result[i+1] := WideChar(chars[i]);
end;

Then you can call it like this:

ws := InitialiseWideString([$0054, $0069, $006D, $0065, $0020, $0074, $006F, 
  $0020, $0075, $0070, $0067, $0072, $0061, $0064, $0065]);

–jeroen

Posted in Delphi, Delphi 7, Development, History, Software Development | 3 Comments »

Dynamically instantiating instances in Delphi without knowing their full type is hard

Posted by jpluimers on 2020/06/17

For my reading list: [WayBack] So am working on a particular .NET project and came across NewtonSoft JSON.NET Serializer, it allows you serialize Collections such as a generic list an… – Ugochukwu Mmaduekwe – Google+:

Stefan Glienke:
Serializing and mostly deserializing generics in Delphi is a major PITA because we don’t have such capabilities to dynamically work with them like in C# where you can easily create new generic lists at runtime where you don’t know the precise type T at compile time.

–jeroen

 

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

How to return a string value from a Bash function – Stack Overflow

Posted by jpluimers on 2020/06/17

Cool: you can return strings both as a function result, and by reference: they are explained in the question, second and fourth answer of [WayBack] How to return a string value from a Bash function – Stack Overflow.

Returning them by reference has two important benefits:

  1. it is much faster (especially useful in tight loop)
  2. you can use echo (normally used to return a result) for debugging purposes

I also needed a bit of switch magic which I found at [WayBack] bash – Switch case with fallthrough? – Stack Overflow and array magic (from [WayBack] Array variables) as arrays are far more readable than indirection (on the why not, see [WayBack] BashFAQ/006 – Greg’s Wiki: How can I use variable variables (indirect variables, pointers, references) or associative arrays?).

So here is a function that returns a specific IPv4 octet.

function getIpv4Octet() {
  IPv4=$1
  octetIndex=$2
  outputVariable=$3

  slice="${IPv4}"
  count=1
  while [ "${count}" -le 4 ]
  do
    octet[${count}]="${slice%%.*}"
    slice="${slice#*.}"
    count=$((count+1))
  done
   
  case "${octetIndex}" in
    "1" | "2" | "3" | "4")
      ;;
    *)
      octetIndex="4"
      ;;
  esac
  eval $outputVariable="${octet[$octetIndex]}"
}

You call it like this:

$ getIpv4Octet "192.168.178.32" 3 result && echo ${result}
178

–jeroen

Posted in *nix, *nix-tools, bash, bash, Development, Power User, Scripting, Software Development | Leave a Comment »

A Tale of Many Divisions – Naive Prime Factorization Across a Handful of Architectures

Posted by jpluimers on 2020/06/16

[WayBack] A Tale of Many Divisions – Naive Prime Factorization Across a Handful of Architectures

Source code: [WayBack] GitHub – blu/euclid: An extremely naive prime factorizer

Via: [WayBack] Blu looks at how a small piece of code with divisions surprisingly behave on various architecture: #Arm, #MIPS, and #x86. – Jean-Luc Aufranc – Google+

–jeroen

Posted in Assembly Language, C++, Development, Software Development | Leave a Comment »

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