This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.
To capture the video (filesize: 19MB), using the free "QuickTime Player" application:
joshuarli
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| #define _XOPEN_SOURCE 700 | |
| #include <signal.h> | |
| #include <unistd.h> | |
| int main() | |
| { | |
| sigset_t set; | |
| int status; | |
| if (getpid() != 1) return 1; |
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| #!/bin/bash | |
| function test { | |
| MESSAGE=$1 | |
| RECEIVED=$2 | |
| EXPECTED=$3 | |
| if [ "$RECEIVED" = "$EXPECTED" ]; then | |
| echo -e "\033[32m✔︎ Tested $MESSAGE" | |
| else |
This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).
Matrix multiplication is a mathematical operation that defines the product of
- macOS 10.15.5
- tmux 3.1b
macOS has ncurses version 5.7 which does not ship the terminfo description for tmux. There're two ways that can help you to solve this problem.
Instead of tmux-256color, use screen-256color which comes with system. Place this command into ~/.tmux.conf or ~/.config/tmux/tmux.conf(for version 3.1 and later):
tiran
/ python-on-debian.md
Last active
May 14, 2024 13:09
Negative Python user experience on Debian/Ubuntu
The user experience of Python on a minimal Debian or Ubuntu installation is bad. Core features like virtual environments, pip bootstrapping, and the ssl module are either missing or do not work like designed and documented. Some Python core developers including me are worried and consider Debian/Ubuntu's packaging harmful for Python's reputation and branding. Users don't get what they expect.
The problems can be easily reproduced with official Debian and Ubuntu containers in Docker or Podman. Debian Stable (Debian 10 Buster) comes with Python 3.7.3. Ubuntu Focal (20.04 LTS) has Python 3.8.5.