serhii.net

DTB Todo

Analyzing this DTB would make for an interesting blog post, especially by plotting the frequency of words in the headers, length, time of the day they were created. Same goes for the link wiki. Same goes for list of URLs and graphing the number of them returning 404s or similar.

I also want to create better Python scripts that join everything to the master file (Master file | Diensttagebuch) with better formated dates.

Rsync to slash or not to slash

This definitely goes into anki: Rsync – To Slash or Not To Slash? – Rants & Raves – The Blog!

Without a slash on the source directory means copy both the source directory, and the contents (recursively if specified) to the destination directory while adding a trailing slash means only copy the contents of the source directory, recursively if specified, to the destination. Without a slash on the source directory means copy both the source directory, and the contents (recursively if specified) to the destination directory while adding a trailing slash means only copy the contents of the source directory, recursively if specified, to the destination.

TL;DR: #anki

• Source directory:
  • Slash: copy the contents of the source directory, without the directory itself
  • No slash: copy both the directory and its files
• Destination directory: doesn’t matter

The difference between /target/source/source_content and /target/source_content.

Usually I want slash.

To memorize, the slash represents the contents of the directory in some way.

Also nice handy command tree that I didn’t know I needed.

grep excluding matches

On the topic of the things I keep forgetting: grep -v excludeme, mnemonic might be reVerse? #anki

rsync show progress

rsync -ra --info=progress2 source target #anki

Usually this is what I want, otherwise there’s pv that I could never get to work reliably

Random / Interesting / Ukrainian

Хештег - Як перекладається слово Хештег українською - Словотвір

З огляду на технічну складову питання додам коротке обґрунтування назви “кришмітка”. Слово hash-tag отримало таку назву не просто із-за символа “решітка”, причиною використання цього символа є скорочення написання слова hash-tag, коріння якого по своїй суті заходить глибоко в науку про компьютери. Розробники використовють слово hash як скорочення слова dictionary (словничок) що є спеціальною структурою даних котра пришвидшує пошук. Hash-tag або “#tag” з технічної точки зору означає те що слово “tag” проіндексується (потрапить у індекс або іншими словами словничок) і надалі буде доступне для швидкого пошуку. Тепер про саме слово hash, у тій же компьютерній науці існує багато стуктур даних здатних виконувати роль словничка. Hash-словнички особливі тим що використовують спеціальну hash-функцію, котра дозволяє отримувати інформацію із найменшою кількістю дій над словничком (аналогія дії - перелистування сторінок словника, що є вкрай повільним). Hash-фунція на основі вхідної послідовності символів (текста чи слова) підраховує число. Якісна hash-функція буде генерувати числа особливим чином, якщо в тексті замінити бодай одну літеру число має змінитися кардинально, але визначальним є те що якщо на вхід подавати одну і ту ж саму послідовність число має залишитися незмінним. Таким чином після того як ваша послідовність символів потрапила у словничок, вам не потрібно гортати його сторінки для того щоб знайти необхідний ключ, ви підраховуєте хеш-функцію яка вам повертає номер сторінки де має знаходитись слово. Hash-функція отримала таку назву із-за дій що вона виконує над вхідними данними всередині себе. Фактично вона “кришить”, “рубає”, “перемішує”, “заплутує” вхідні данні, що відповідає англійському перекладу слова hash. Тобто логічним було б перекласти слово хеш у цьому контексті як “криш” або “міш”. Переклад слова “tag” вже здійснений, і це “мітка”, поєднавши ці варіанти отримаємо “кришмітка” що в одночас володіє певною милозвучністю.

“Кришітка” є спрощеним варіантом новотвору “кришмітка”, запропонованого Денисом Яремовим. Але має кілька суттєвих переваг: 1) Милозвучніше; 2) Відповідає етимології (криш-мітка); 3) І до того ж співзвучне з назвою самого символу # - “решітка”.

Знову захотілося писати Соломку українською мовою, просто щоб мати змогу використовувати слово “кришітка” :)

Taskwarrior

Removed the dependency from $SPRINT by simplifying basically everything in .zshrc:

s () {task s sprint.is:$(date +%-V) or sprint:c $*}

Downloading private youtube playlist using youtube-dl

A mostly-complete example: youtube-dl --yes-playlist --cookies ~/D/cookies.txt --playlist-end 100 --playlist-start 18 --write-description --write-info-json --all-subs -o '%(playlist_index)s - %(title)s.%(ext)s' --user-agent "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) QtWebEngine/5.9.5 Chrome/56.0.2924.122 Safari/537.36" --min-sleep-interval 0 --max-sleep-interval 20 -i https://www.youtube.com/playlist\?list\=$MYPLAYLIST

-i is for skipping errors (“ERROR: 1Jlvi4qTiyE: YouTube said: This video contains content from DisneyEnterprisesInc, who has blocked it on copyright grounds.”)

I could not get --user to work, because I got error 400, but --cookies works. qutebrowser’s cookies are not in the right format (but are located at ~/.local/share/qutebrowser/cookies and nicely readable), and firefox’s cookies can be downloaded using cookies.txt – Get this Extension for 🦊 Firefox (en-US).

Youtube mildly interesting statistics

Out of 2279 videos, 1995 were available, that would mean 87.5%. Makes me a bit anxious about the links on my links wiki :) I should do some datahoarding/archiving there too.

And another interesting thing - the random quotes from my file usually are not easy to google, and the only result is my blog post with them (Private: ~/notes/quotes; ~/notes/phrases | Я сам, соломка, чай.)

Everything as-is, sadly I don’t have sources for everything, but should be pretty easy to google.

Ha.

English

kibble is store-bought dry (mostly) cat food. To kibble = ’to coarsely grind’. Found on Peter Watts’ The Kibble Fund

Searching in quotes

TIL DDG doesn’t allow me to search for exact matches in quotes, which I find absolutely idiotic. Yandex works, Google works. The usual “I want to like ddg but I honestly can’t”

To read / interesting

/g/ - Let’s collect here programming books that are unusual in some sense, be it their approach, presentation, or simply just quality. “The little schemer” has a nice dialog-like structure, and I find this very interesting. I wonder if there are any other similar books (or threads).

Editing bash scripts

Take care editing bash scripts

Well, after the 30 seconds elapses, the running script deletes all of my files. This happens because bash reads the content of the script in chunks as it executes, tracking where it’s up to with a byte offset. When I delete one character from the sleep line, the “next command” offset points at the r in #rm instead of the #. From the interpreter’s point of view, the # shifts backwards onto the previous line so it runs the unfortunate command.

Javascript snipped to remove consent popups + qutebrowser bookmarklets

javascript:(function(){(function () {var i, elements = document.querySelectorAll('body *');for (i = 0; i < elements.length; i++) {if (getComputedStyle(elements[i]).position === 'fixed') {elements[i].parentNode.removeChild(elements[i]);}}})();document.querySelector('body').style.setProperty('overflow','auto','important'); document.querySelector('html').style.setProperty('overflow','auto','important');})(), found in One of my favorite bookmarklets to remove cookie notifications or other obnoxiou… | Hacker News

To run it as bookmarklet in qutebrowser, jseval works:

:jseval (function(){(function () {var i, elements = document.querySelectorAll('body *');for (i = 0; i < elements.length; i++) {if (getComputedStyle(elements[i]).position === 'fixed') {elements[i].parentNode.removeChild(elements[i]);}}})();document.querySelector('body').style.setProperty('overflow','auto','important'); document.querySelector('html').style.setProperty('overflow','auto','important');})()

Now bound to ,b:

config.bind(",b", ":seval (function(){(function () {var i, elements = document.querySelectorAll('body *');for (i = 0; i < elements.length; i++) {if (getComputedStyle(elements[i]).position === 'fixed') {elements[i].parentNode.removeChild(elements[i]);}}})();document.querySelector('body').style.setProperty('overflow','auto','important'); document.querySelector('html').style.setProperty('overflow','auto','important');})()")

And as a bonus, ,w now takes me to the wayback machine for that page:

config.bind(",w", ":jseval javascript:location.href='https://web.archive.org/web/*/'+location.href")

Qutebrowser show all bindings

:bind opens a page with all the bindings as currently configured. This answered a lot of my quesions, especially about the caret mode bindings that are not documented anywhere I could find. What’s interesting is the Ctrl-e in Insert mode that opens the editor (I usually did Esc+e)

Blog categories

TODO: Add links to categories in my blog, they might be useful for example for Pentachronological #0015 Праздник | Я сам, соломка, чай.. And in general maybe look into the blog itself - maybe I want to unite it with Diensttagebuch or something?

Jekyll images size

{%raw%}![ddr](/wp-content/static/pentachronological/d2.jpg){:width="40%"}{%endraw%}

Random/Interesting

If you really want to make something good, eat good food and drink good saki. (Welcome to the NHK, episode 20.) ¹

A tv drama has a progressive plot, an emotional climax and a resolution, but our lives aren’t like that… all we get day after day are vague anxieties that are never resolved. ²

questo è uno di quegli anime che fanno morire una piccola parte di te, passi 1-2 giorni ripensando a ciò che hai visto malinconico. Al 3 giorno pensi un’ultima volta a ciò che ti ha trasmesso, sorridi e il vuoto che ti ha dato si riempie di fiori dandoti molto di più da ciò che ti aspettavi. ³

And on the topic of fully enlightened people:

Ad-hoc tables via tabulate

tabulate works surprisingly well to make random tables:

>>> x = tabulate.tabulate([['WHAT','Will happen','Will not happen'],['If I do this','',''],['If I don\'t do this','','']],tablefmt='grid')
>>> print(x)
+--------------------+-------------+-----------------+
| WHAT               | Will happen | Will not happen |
+--------------------+-------------+-----------------+
| If I do this       |             |                 |
+--------------------+-------------+-----------------+
| If I don't do this |             |                 |
+--------------------+-------------+-----------------+
>>>

Italian

(wow?) debellare - Wiktionary - sconfiggere/eliminare. ³

Inkscape make handler nodes bigger

microscopic handle nodes - Beyond the Basics - Inkscape Forum

Confusingly, that setting is in Preferences > Input/Output > Input Devices.

Krita lags

Krita’s slowness can be fixed by looking at the settings of Display and looking through Krita FAQ — Krita Manual version 4.3.0.

Zathura follow links / display links

Except by clicking on them, f gives numbers you can follow;F outputs the link text in the statusbar.

Anki::Import

The Anki::Import documentation doesn’t make it clear enough, but using a quote(') works too for carrying on old tags along with the usual backtick, but for signalling an empty field only the backtick works.

Also I don’t think I can control the Cloze deletions - it automatically generates identifiers for them. Not going to get into perl to fix this :)

Vim regex reference

Vim Regular Expressions 101 is a really nice reference for vim’s search/replace/regex things. Maybe I’ll work through it later.

Most interesting is that groups are created with \(-\) and mentioned as \1 (will be handy for search-and-replace!)

I miss having a “now learning” textfile. (TODO)

Also this is a nice summary of the differences between vim and python/perl regexes, in vim characters are more likely to be literally interpreted: ¹

Perl    Vim     Explanation
---------------------------
x?      x\=     Match 0 or 1 of x
x+      x\+     Match 1 or more of x
(xyz)   \(xyz\) Use brackets to group matches
x{n,m}  x\{n,m} Match n to m of x
x*?     x\{-}   Match 0 or 1 of x, non-greedy
x+?     x\{-1,} Match 1 or more of x, non-greedy
\b      \< \>   Word boundaries
$n      \n      Backreferences for previously grouped matches

And regex101.com remains the best place to test usual regexes.

Pinta and gthumb

I’ve been looking for something simpler than GIMP for casual blurring / cropping / adding text, pinta mostly fits the bill but I find it hard to use and no easy blur brush, gthumb is much more minimalistic in functions but is more pleasant to use.

Zsh global aliases and aliases that take arguments

Zsh has global aliases! An Introduction to the Z Shell - Aliasing is awesome. alias -g M='| more' -> who M

This has a lot of potential for often-typed parts of commands.

But I went there to look for arguments, and apparently zsh explicitly doesn’t have them and wants functions instead. So:

% rm () { mv $* /tmp/wastebasket }
% rm foo.dvi
% ls /tmp/wastebasket
foo.dvi

So I changed my taskwarrior s alias to:

#alias s='task s sprint.is:$SPRINT or sprint:c' 
s () {task s sprint.is:$SPRINT or sprint:c $*}

Now I can finally filter my tasks for the sprint (s +F)

// TODO replace dependence on $SPRINT by just usind current week number.

Not the first time I neglect to read the documentation of the software I switch to, being happy that it mostly works like the previous one.

Random / interesting

The Technium: 68 Bits of Unsolicited Advice

My favourite parts:

• Being enthusiastic is worth 25 IQ points.
• Being able to listen well is a superpower. While listening to someone you love keep asking them “Is there more?”, until there is no more.
• A worthy goal for a year is to learn enough about a subject so that you can’t believe how ignorant you were a year earlier.
• Gratitude will unlock all other virtues and is something you can get better at.
• Treating a person to a meal never fails, and is so easy to do. It’s powerful with old friends and a great way to make new friends.
• Reading to your children regularly will bond you together and kickstart their imaginations.
• Rule of 3 in conversation. To get to the real reason, ask a person to go deeper than what they just said. Then again, and once more. The third time’s answer is close to the truth.
  • Compare Five whys - Wikipedia* and death certificates with multiple “due to (or as a consequence of)”
• The purpose of a habit is to remove that action from self-negotiation. You no longer expend energy deciding whether to do it. You just do it. Good habits can range from telling the truth, to flossing.
• Promptness is a sign of respect.
• If you are looking for something in your house, and you finally find it, when you’re done with it, don’t put it back where you found it. Put it back where you first looked for it.
• Show up. Keep showing up. Somebody successful said: 99% of success is just showing up.
• Separate the processes of creation from improving. You can’t write and edit, or sculpt and polish, or make and analyze at the same time. If you do, the editor stops the creator. While you invent, don’t select. While you sketch, don’t inspect. While you write the first draft, don’t reflect. At the start, the creator mind must be unleashed from judgement.
• Perhaps the most counter-intuitive truth of the universe is that the more you give to others, the more you’ll get. Understanding this is the beginning of wisdom.
• Friends are better than money. Almost anything money can do, friends can do better. In so many ways a friend with a boat is better than owning a boat.
• You are what you do. Not what you say, not what you believe, not how you vote, but what you spend your time on.
• When you die you take absolutely nothing with you except your reputation.
• Before you are old, attend as many funerals as you can bear, and listen. Nobody talks about the departed’s achievements. The only thing people will remember is what kind of person you were while you were achieving.
• When crisis and disaster strike, don’t waste them. No problems, no progress.
• When you get an invitation to do something in the future, ask yourself: would you accept this if it was scheduled for tomorrow? Not too many promises will pass that immediacy filter.
• Acquiring things will rarely bring you deep satisfaction. But acquiring experiences will.
• Rule of 7 in research. You can find out anything if you are willing to go seven levels. If the first source you ask doesn’t know, ask them who you should ask next, and so on down the line. If you are willing to go to the 7th source, you’ll almost always get your answer.
• When someone is nasty, rude, hateful, or mean with you, pretend they have a disease. That makes it easier to have empathy toward them which can soften the conflict.
• Eliminating clutter makes room for your true treasures.
• Experience is overrated. When hiring, hire for aptitude, train for skills. Most really amazing or great things are done by people doing them for the first time.
• Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job, buy the very best you can afford.
• Following your bliss is a recipe for paralysis if you don’t know what you are passionate about. A better motto for most youth is “master something, anything”. Through mastery of one thing, you can drift towards extensions of that mastery that bring you more joy, and eventually discover where your bliss is.
• The universe is conspiring behind your back to make you a success. This will be much easier to do if you embrace this pronoia.

Backup entire github account with all the repositories

Very nice tool: amitsaha/gitbackup: Tool to backup your GitHub and GitLab repositories

The Github token needed only the repo scope, needed to add it to the env variable with:

export GITHUB_TOKEN=$MYGITHUBTOKEN

Command to backup was:

./gitbackup-0.5-linux-amd64 -backupdir $BACKUPDIR -service github

Should also work for gitlab.

Also magically it took something like 30 seconds for the all of the 3.5GB of all my repos.

German

lutschen / an etw_Dat. lutschen - to suck (on) sth; Lutschtablette = lozenge.

English

lozenge: 1) A rhombus (shape); 2) A small (originall diamond-shaped!) tablet/sweet for a sore throat.

Random / interesting

Agnes Obel - Fuel To Fire (Official Video) - YouTube

First comment on the video:

All the people in this video are dead. Life is short, don’t do anything that makes you unhappy

History is happening

I can’t believe I have to say this, but please don’t drink bleach.

— Joe Biden (@JoeBiden) April 24, 2020

We live in interesting times.

English

shambolic - Chaotic, disorganised or mismanaged. Found somewhere on The Guardian applied to Trump’s daily health briefings.

Vim exclamation mark to switch parameters

A ! either forces the action or toggles the action:

:set cursorline, to turn off: :set nocursorline

Is equivalent to:

:set cursorline! ¹

python tabulate module

tabulate² generates nice tables of various formats! Things like:

print(tabulate.tabulate(db,headers=db.columns))

      epoch    loss    val_loss    val f-score
--  -------  ------  ----------  -------------
 0        1    4.31        4.62          0.579
 1        2    3.72        3.61          0.705
 2        3    3.54        3.25          0.722
 3        4    3.31        3.06          0.737
 4        5    3.19        2.93          0.736
 5        1    4.31        4.62          0.581
 6        2    3.72        3.61          0.72
 7        3    3.54        3.25          0.755
 8        4    3.31        3.06          0.755
 9        5    3.19        2.93          0.764
10        6    3.12        2.83          0.798
11        7    2.95        2.76          0.779
12        8    2.91        2.69          0.757
13        9    2.84        2.64          0.816
14       10    2.68        2.63          0.835
15       11    2.71        2.56          0.83
16       12    2.69        2.52          0.825
17       13    2.62        2.49          0.826
18       14    2.6         2.46          0.845
19       15    2.56        2.44          0.84

tabulate · PyPI is the basic documentation with visualizations of each tablefmt. It even supports jira! And pipe is the usual markdown format. Let’s try:

Tensorflow how does training happen with nan? TODO

How does Tensorflow train stuff when loss is nan? It keeps doing something, accuracy changes, etc etc etc. - is the gradient calculated per batch as normal,

Note

Einstein / Netzah “do your own thing”