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tzot

274 karma · joined June 14, 2020

Just an earthbound misfit, I.
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tzot··on Pantograph
I remember SQLWindows of Gupta Technologies (later renamed to Team Developer of Centura Technologies IIRC) which had an outline IDE. Quoting from https://yagnipedia.com/wiki/sqlwindows :

> SQLWindows had an outline-based code structure — not braces, not BEGIN/END, but an indented tree that was simultaneously the code and the IDE’s display. You wrote code by expanding and collapsing outline nodes. Classes were outline headings. Methods were sub-headings. Code lines were leaf nodes. The entire program was a hierarchical outline that the IDE rendered as a collapsible tree.

tzot··on UEFA and its national associations will not participate in FIFA competitions
And corporate UX/Design teams are eager to modernize those cards; yes they're already flat, but canary yellow is so last century and some glass effects or abolishing the rounded corners will be the next thing.
tzot··on A shell colon does nothing. Use it anyway
Do you have a real-world example where we would like to preserve `$?` after the `if` (which `if` specifically branches on the result code of the command it tests)? Where we want to use the actual return code that the `if` did not handle itself.

I am asking because I have never needed preserving the `$?` outside of an `if`, nor have I ever seen this in somebody else's scripts, and I'm curious.

tzot··on A shell colon does nothing. Use it anyway
I believe you missed a semicolon after `exit 1` and before `}`. `}` closes the opening `{` only at the start of a command (POSIX rules; don't remember now if bash recognizes it when it's just a command argument).
tzot··on I Owe My Life to the Commodore 64
Commodore 64 was quite popular in Europe too, but I believe more successful was the Sinclair Spectrum (and some copycats behind the iron curtain). In my case, too, it was the Speccy and later the Sinclair QL, when it got really affordable; I owe my life to the QL :)
tzot··on SQLite should have (Rust-style) editions
Exactly. In cases where I expect long-running parallel connections from separate processes to the same sqlite file, I make sure that all read transactions do `BEGIN DEFERRED` so `COMMIT` releases the read locks, and all write transactions do `BEGIN IMMEDIATE` so that `SQLITE_BUSY` timeout is not side-stepped.

There was one case where all transactions were implemented using nested `SAVEPOINT bla` so `BEGIN IMMEDIATE` could not be used without more hassle, so this ended all “I know I'm going to write” transactions to instantly update a single-row table so that their lock would not begin as DEFERRED and eventually switch to `IMMEDIATE`; this way almost all `SQLITE_BUSY` side-steppings disappeared. (timeout was set to 30 seconds but all read/write transactions were instrumented to have less than 5 seconds duration).

tzot··on SQLite should have (Rust-style) editions
> I once had to clean up a project where some code had accidentally been writing the strings '1' and '0' to a column which was intended to store booleans (1 and 0). That was not a fun debugging story.

So this was a write to a column that did not have INTEGER affinity. If it was intended to be used as a boolean, then it should have INTEGER affinity. I know because I've tried hard to enter integer- and float-like strings as strings in INTEGER affinity columns, and I haven't managed to; I could only insert them as BLOBs, or prefix the string with say '\' and check/remove at the application level. (That was for an ontology-like database, where table EAttribute.eatvalue could have any type.)

tzot··on TIL: You can make HTTP requests without curl using Bash /dev/TCP
I would use HTTP/1.0 without a need for Connection: close. Unless 1.0 is not generally supported anymore, but this is not the case in my experience.
tzot··on Should you normalize RGB values by 255 or 256?
The debate is if 2000 is the first year of the 21st century or the last year of the 20th century. (btw I agree with the latter)
tzot··on Making your own programming language is easier than you think (but also harder)
You say all wrong and then go on about explaining I'm half wrong. I feel there's a pattern (or maybe another joke that whooshed over my head) here but it is obvious to me that I am not your intended stand-up comedy audience and I should ask for my money back. :)
tzot··on Making your own programming language is easier than you think (but also harder)
I see that and I raise Elastic Tabstops!

https://nick-gravgaard.com/elastic-tabstops/

tzot··on Making your own programming language is easier than you think (but also harder)
> > If I were to make my own programming language, it would look an awful lot like Python.

> I agree, Python allows anyone to write bad code, but makes up for it by running the code slow enough that it can't do real damage.

In the same sentence you agree with the implied beauty of the syntax of Python and then go on sarcastically about the performance of CPython. Assumably you deliberately mixed language and implementation because you needed a soapbox, so hey, here's my comment to which you can reply and continue your rhetoric.

tzot··on Pomiferous: The most extensive apples (pommes) database
I blame font keming for that.
tzot··on Battle for Wesnoth: open-source, turn-based strategy game
Oh, yeah! And I believe there are not many games which have Linux, Windows and MacOS versions allowing interplay. Several years ago we had one or two LAN parties with hardware running all three operating systems.
tzot··on CodingFont: A game to help you pick a coding font
I tried this variant of JetBrains Mono and it had the perfect glyph width (reportedly -6%) for my screen and window sizes: NRK Mono Condensed from https://github.com/N-R-K/NRK-Mono. I also agree with almost all of the other modifications mentioned in the github page under “Some notable changes are:”

Now I can have side-by-side two editors plus a Structure or Project pane at the left in PyCharm while having 120 chars visible in both editors.

tzot··on Everything old is new again: memory optimization
Well, we can use memoryview for the dict generation avoiding creation of string objects until the time for the output:

    import re, operator
    def count_words(filename):
        with open(filename, 'rb') as fp:
            data= memoryview(fp.read())
        word_counts= {}
        for match in re.finditer(br'\S+', data):
            word= data[match.start(): match.end()]
            try:
                word_counts[word]+= 1
            except KeyError:
                word_counts[word]= 1
        word_counts= sorted(word_counts.items(), key=operator.itemgetter(1), reverse=True)
        for word, count in word_counts:
            print(word.tobytes().decode(), count)
We could also use `mmap.mmap`.
tzot··on Shell Tricks That Make Life Easier (and Save Your Sanity)
For the most simple case of a single job, I use the job number (`[1]` in the example) with %-notation for the background jobs in kill (which is typically a shell builtin):

    $ cat
    ^Z[1] + Stopped                    cat
    $ kill %1
tzot··on Shell Tricks That Make Life Easier (and Save Your Sanity)
On scripts that might handle filenames with spaces, I include:

    IFS='   ''
    '
Hint: the spaces between the first two apostrophes are actually one <Tab>.

This does not affect the already written script (you don't need to press Tab instead of space to separate commands and arguments in the script itself), but by making <Tab> and <LF> be the “internal field separators” will allow globbing with less quoting worries while still allowing for `files=$(ls)` constructs.

Example:

    IFS='   ''
    '
    echo hello >/tmp/"some_unique_prefix in tmp"
    cat /tmp/some_unique_prefix*
    fn="My CV.txt"
    echo "I'm alive" >/tmp/$fn
    cat /tmp/$fn
Of course this will still fail if there happens to be a filename with <Tab> in it.
tzot··on Shell Tricks That Make Life Easier (and Save Your Sanity)
> # f2 is ^[OQ; to double check, run `xargs` and then press f2

I remember using `cat -v` before learning that `xargs` exists… or maybe before `xargs` actually existed on systems I used :)

tzot··on SBCL: A Sanely-Bootstrappable Common Lisp (2008) [pdf]
Maybe you understood image as in photo-image instead of image as in memory-image (like disk-image); a glorified memory dump, more-or-less.
tzot··on Ki Editor - an editor that operates on the AST
I had this issue too, so I remapped Ctrl-W/Shift-Ctrl-W to Ctrl-\/Shift-Ctrl-\ . (Also git operations became two-key sequences, starting with Ctrl-G and that damn Ctrl-K stopped being the shortcut for commit.)
tzot··on Python VM in Assembly (contributor is Claude)
An implementation from zero of a Python 3.12 VM using x86-64 assembly.
tzot··on American importers and consumers bear the cost of 2025 tariffs: analysis
I always have been using em-dashes with specific spacing:

1. replacing parentheses —given that the em-dash in pairs for me mark more-relevant-to-the-main content than a parenthesized expression would— so I use the same spacing as `()`

2. replacing colon or just finishing the sentence with a subsentence— so the spacing goes like for a colon.

Probably unfounded grammatically and against any style guides, but this spacing makes sense to me.

tzot··on Neural Networks: Zero to Hero
And some time later, someone shouts “72!” Everyone chuckles except from the one in the corner cell, who laughs so loud and for so long people think he'll have a heart attack. When eventually he stops laughing, someone yells: “Hey Fred, why did you laugh so much?” “I'd never heard that one!”
tzot··on SHARP, an approach to photorealistic view synthesis from a single image
> Imagine history documentaries where they take an old photo, free objects from the background

Even using commas, if you leave the ambiguous “free” I suggest you prefix “objects” with “the” or “any”.

tzot··on A worker fell into a nuclear reactor pool
Did you mean “not great, not terrible” or was the change deliberate?
tzot··on Simulating a Machine from the 80s
> Something about having Cyrillic where the lower-case character set should be, just tickles my hacker heart.

We did the same on the ZX Spectrum in Greece for our programs: replace the lowercase latin letters with the keyboard-matching greek letters.

I still remember the vulgar ΣΨΡΟΛΛ? when the screen filled up and the machine asked your permission to scroll!

tzot··on The Lobster Programming Language
I totally agree with your gripe about JSON's lack of comments. There were people AFAIK who tried to write a spec with comments (and maybe dangling commas? was it called JSON5?) but by then it probably was too late.
tzot··on The Lobster Programming Language
> The problem (as felt by me and also as identified by the person you replied to) is that you can't copy-paste/munge some stuff into the right spot and then just let the formatter to fix the indentation.

That problem I undestand, and that is why I suggested to convert both into JSON —or YaML with default_flow_style=True which would preserve datetimes and other non-JSON stuff— and copy-paste without the hassle of having to indent/unindent correctly. Of course that doesn't help with copying comments. That would need extra copy-paste operations, but still one hasn't the hassle of significant whitespace. The following is also valid YaML:

    {"some_key": {
    "attr1":
    # an intermittent comment
    "val1", "attr2": 12312  # more comments!
    }
    }
tzot··on The Lobster Programming Language
Was there any reason not to use flow collection style, which would free the templates from significant whitespace?
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