Markus H MawKKe

Problem

Swift build does not work. Not even on brand new project. Example:

Create new proejct

$ mkdir swift-app-test2; cd swift-app-test2
$ swift package init

My notes and observations about python nanobind + scikit-build-core usage

nanobind is a tool and a library for implementing native C/C++ extensions for python. You can implement such extensions in many ways, but nanobind makes life a bit more easier, especially if you write C++ and use CMake to build your native code.

nanobind recommends using the scikit-build-core as the build backend; it handles the heavy lifting of building stuff through CMake during python package build process. It even supports using Ninja. And as a cherry on top, it is able to download CMake and Ninja from pypi if they are not available locally.

Problem with Telegram and stuck Draft message

2024-05-06: I was using telegram to send a message in one of the group chats I'm in.

2024-05-07: I noticed that a copy of my sent message was left as draft in the same chat (which is indicated by a red Draft: prefix in the chat list). If I opened the chat group, the draft message would indeed be entered in the message preparation box.

However, I could not erase the draft message; if I tried, it would simply return in a few seconds. I tried several times.

I noticed I could erase parts of the draft or add more. All those changes would be reflected between my phone and laptop.

Background

Most programming languages have basic types such as booleans, bytes, shorts, integers, floating point numbers, strings, lists, etc. If you squint your eyes a bit, you'll notice all of these are just a bunch of bytes with varying sizes and shapes.

Strings (arrays) are (possibly unbounded) sequence of bytes. Integers and floating point types are often represented as fixed number of bytes or bits. Booleans semantically means "one bit", but often are implemented as a single byte (for performance reasons).

Now, think how many different values or states can each of these represent. Well, obviously the answer if 2**(number of bits in the type), duh!

Strings (arrays) can encode billions, trillions, gazillions ... of different states.
Integers can represent quite many, but considerably less (~4 billion for 32 bits)

	"""
	Terminal/Console flow control demo

	Most terminals support ctrl+S/ctrl-Q for pausing and unpausing
	writing to it, which can be useful in some situations.

	However, note that the terminal pause does _not_ pause the whole process,
	how terminal job control (ctrl-z) does. Instead, only the thread that
	attempts to write to stdout will block, while other threads are free to
	continue processing. Only way other threads would block is they, too,

	#!/usr/bin/env python3

	"""
	Usage:
	$ zip-dir -i path/to/directory -o myarchive.zip --level 0

	or more verbosely:
	$ zip-dir --input-dir path/to/directory --output-zip myarchive.zip --level 0

	Install:

	import math
	M = 80

	points = [(10, 20), (40, 30), (40, 35), (65, 25), (55, 60), (20,60), (75,75)]

	def dist(p1, p2):
	dx = abs(p1[0] - p2[0])
	dy = abs(p1[1] - p2[1])
	return math.sqrt(dxdx + dydy)

	// build and run with:
	// $ gcc nullptr-shenanigans.c -Wall -Wextra -pedantic -std=c99 -O0 -o lol
	// $ ./lol

	// expected output:
	// Got SIGSEGV at address: 0x0 (REG_RIP = 93937079497465)
	// This should not print: p = (nil)?
	// Allright then, we are done!

	#define _GNU_SOURCE 1 /* To pick up REG_RIP */

	"""
	Are you tired of plain old integer-based indexing?

	Use floats instead!
	"""

	# Author: Markus H (MawKKe) 2024-04 https://github.com/MawKKe

	import math
	import typing as t