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Ruby: reading from STDIN, if there is something to read.

Posted 09-25-2021 at 01:11 AM by Michael Uplawski
Updated 10-08-2021 at 11:49 PM by Michael Uplawski (Category)

The logic of ARGV and ARGF still escapes me, I am approaching perfection empirically by trial, error and surrender. Now I believe to do stuff the right way, which is highly unsatisfactory.

Today's sura goes like this:

To avoid a hanging program, when there are no data waiting at STDIN, thou shalt write
if !STDIN.tty?
  # do as you must
tty meaning “teletype-writer”, it stands for terminal/console/pseudo-terminal and the like....
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Email Filter With Procmail: Filter Received-Headers By IP-Range

Posted 07-12-2021 at 03:02 PM by Michael Uplawski
Updated 06-07-2022 at 12:15 AM by Michael Uplawski ( mail addresses exist.)

A styled version of this text in French:
EDIT (27/09/2021): write positive test results to the procmail log-file

I have not found much insight on the Web about the feasibility of an idea that I have had many years ago, but then had forgotten for a while:
Filter email by Received-header, if the IP-address in this header belongs to a specific range of IP-addresses.
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Views 730 Comments 0 Michael Uplawski is offline

False statement

Posted 03-23-2021 at 12:57 AM by Michael Uplawski
Updated 12-06-2021 at 07:14 AM by Michael Uplawski

I just modified my comment to one of my own blog-entries but now feel that it is itself worth an entry.

If it sticks it may be sticky. Avoid.
This comment contained a false statement. I have to leave it here and mark it as false, because it is frequently repeated in a pseudo-scientific context, by right-wing political activists, by marketing-experts, by so-called “coaches”.

The story is that, around 1955, an American scientific formulated a hypothesis which was
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Views 756 Comments 3 Michael Uplawski is offline

Handwritten Web-Pages

Posted 02-13-2021 at 05:28 AM by Michael Uplawski
Updated 04-04-2022 at 11:31 PM by Michael Uplawski (Link to a published document)

-----> Edit Sat Mar 12 08:30:02 CET 2022: <-------

In German language: a howto for the transformation of handwritten text to Hypertext in Inkscape.

<------ END EDIT ------>
I have a dream...

My hand-writing suffers from not doing any. For some years already I try to compensate by forcing me to use a fountain pen, whenever possible. I even try to find new occasions to use it. The fountain pen obliges me to concentrate and to...
Senior Member
Views 418 Comments 1 Michael Uplawski is offline

Validate OOXML

Posted 12-11-2020 at 10:27 AM by Michael Uplawski
Updated 12-15-2020 at 12:05 AM by Michael Uplawski (moved one paragraph, cosmetics, threads linked.)

Validate OOXML

Ensure the standard-conformance of OOXML-documents created from scratch.
See also the two Threads concerning this topic: A styled version of this document:
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Views 439 Comments 0 Michael Uplawski is offline


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