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

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Archive for June 22nd, 2021

File Line Count: “built-in” line count for Windows

Posted by jpluimers on 2021/06/22

Windows if full of undocumented gizmo’s, like find alternative for wc -l counting all lines in a file: [WayBack] File Line Count

Use FIND command to count file lines, store line count into a variable.

Description: Running the FIND command with option /v and empty search string will find all lines
Running the FIND command with option /c will output the line count only.
The FOR command with option /f will parse the output, the line count in this case, and the set command put the line number into the cnt variable.
Script:
1.
2.
3.
4.
set file=textfile.txt
set /a cnt=0
for /f %%a in ('type "%file%"^|find "" /v /c') do set /a cnt=%%a
echo %file% has %cnt% lines
Script Output:
 DOS Script Output
textfile.txt has 50 lines

[WayBack] Stupid command-line trick: Counting the number of lines in stdin | The Old New Thing

Windows doesn’t come with wc,
but there’s a sneaky way to count the number of lines anyway:

some-command-that-generates-output | find /c /v ""

It is a special quirk of the find command
that the null string is treated as never matching.
The /v flag reverses the sense of the test,
so now it matches everything.
And the /c flag returns the count.

The reason dates back to the original MS-DOS
version of find.exe,
which according to the comments appears to have been written
in 1982.
And back then, pretty much all of MS-DOS was written in assembly
language.

Via: batch file line count – Google Search and [WayBack] windows – How to count no of lines in text file and store the value into a variable using batch script? – Stack Overflow

–jeroen

Posted in Batch-Files, Development, Scripting, Software Development, Windows Development | Leave a Comment »

“Not having done docker, but having developed enough software to have the impression that as soon as things get hierarchical, things eventually end up in a mess. Somewhere down the road something won’t cope with depth/breadth/size and break badly.”

Posted by jpluimers on 2021/06/22

I originally posted this in a docker on docker thread, but I think it holds universally:

[WayBack] Jeroen Pluimers on Twitter: “Not having done docker, but having developed enough software to have the impression that as soon as things get hierarchical, things eventually end up in a mess. Somewhere down the road something won’t cope with depth/breadth/size and break badly.”

This despite the cool gif in the reply:

[WayBack] Duffie Cooley on Twitter: “… “

I found the below video files by searching for zzzz

Original thread start:

[WayBack] Duffie Cooley on Twitter: “When you hear Docker in Docker what do you think of? docker socket: Mounting in the underlying docker.sock and allowing a container to make new containers. kernel privs: Giving enough privs to a new container that it can make new containers cause it shares a kernel.”

–jeroen

Read the rest of this entry »

Posted in Algorithms, Cloud, Containers, Development, Docker, Infrastructure, Kubernetes (k8n), Software Development | Leave a Comment »

“Delphi” “Data provider or other service returned an E_FAIL status” “NVARCHAR” – Google Search

Posted by jpluimers on 2021/06/22

For my link archive: [Archive.is] “Delphi” “Data provider or other service returned an E_FAIL status” “NVARCHAR” – Google Search

In this case it was while reading data. Cause yet unknown, as over time the error disappeared before it could be investigated further.

My initial thoughts:

  • local field size too small for actual content
  • character set mapping issue for certain locales

I recommended checking with [WayBack/Archive.is] bitbucket.org/jeroenp/wiert.me/src/default/Native/Delphi/Library/RTL/i18n/FormatSettingsHelperUnit.pas to see which locale ID and name the process was running under.

Related (but not the cause as this occurred while writing data, not reading): [WayBack] sql server 2008 – Why am I getting Data provider or other service returned an E_FAIL status? SQL Native Client – Stack Overflow

–jeroen

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

 
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