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@sj26
sj26 / LICENSE.md
Last active July 16, 2024 08:45
Bash retry function

This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.

In jurisdictions that recognize copyright laws, the author or authors of this software dedicate any and all copyright interest in the software to the public domain. We make this dedication for the benefit

@merikan
merikan / Jenkinsfile
Last active June 13, 2024 03:56
Some Jenkinsfile examples
Some Jenkinsfile examples
@robert
robert / game_of_life.py
Last active December 22, 2023 10:40
Programming projects for Advanced Beginners #2: Game of Life
import random
import time
DEAD = 0
LIVE = 1
def dead_state(width, height):
"""Constuct an empty state with all cells set to DEAD.
Parameters
@luisfredgs
luisfredgs / pandas_csv_to_json.py
Last active September 27, 2022 14:39
Convert pandas dataframe from CSV to JSON
import pandas as pd
data = pd.read_csv("file.csv", sep=",")
print(data.head(2))
with open('file.json', 'w') as f:
f.write(data.to_json(orient='records', lines=True))
# check
data = pd.read_json("file.json", lines=True)
print(data.head(2))
// Uncompressed version of
// https://gist.github.com/munificent/b1bcd969063da3e6c298be070a22b604
#include <time.h> // Robert Nystrom
#include <stdio.h> // @munificentbob
#include <stdlib.h> // for Ginny
#include <stdbool.h> // 2008-2019
const int HEIGHT = 40;
const int WIDTH = 80;
@lizrice
lizrice / hello_map.py
Last active July 19, 2023 08:20
eBPF hello world
#!/usr/bin/python
from bcc import BPF
from time import sleep
# This outputs a count of how many times the clone and execve syscalls have been made
# showing the use of an eBPF map (called syscall).
program = """
BPF_HASH(syscall);
@MarioHewardt
MarioHewardt / enable_ebpf_on_wsl2
Last active July 22, 2024 18:09
Enable EBPF on WSL2
By default, EBPF programs will not run on WSL2 due to required kernel modules missing. The following example error is an
indication of this problem:
modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/4.19.84-microso
ft-standard/modules.dep.bin'
modprobe: FATAL: Module kheaders not found in directory /lib/modules/4.19.84-microsoft-standard
chdir(/lib/modules/4.19.84-microsoft-standard/build): No such file or directory
To fix this you need to rebuild the WSL2 kernel with the missing kernel modules. The below instructions are for Ubuntu 18.04 WSL2.
1. git clone https://github.com/microsoft/WSL2-Linux-Kernel.git
@DanielSmon
DanielSmon / New MS Teams Profile.cmd
Last active June 19, 2024 23:48
For running multiple MS Teams accounts side by side. Save this with the name of the MS Teams profile you wish to use. When launched, a folder will be created in your user profile. See https://danielsmon.com/2020/04/02/multiple-ms-teams-accounts-on-the-desktop/.
@ECHO OFF
REM Uses the file name as the profile name
SET MSTEAMS_PROFILE=%~n0
ECHO - Using profile "%MSTEAMS_PROFILE%"
SET "OLD_USERPROFILE=%USERPROFILE%"
SET "USERPROFILE=%LOCALAPPDATA%\Microsoft\Teams\CustomProfiles\%MSTEAMS_PROFILE%"
REM Ensure there is a downloads folder to avoid error described at
@atomicstack
atomicstack / fetch_raspberry_pi_firmware.sh
Last active August 29, 2023 22:56
a one-liner to fetch the latest revisions of /boot/*.{elf,dat} in the RPi firmware repository (because it's a 14GB repo and cloning takes forever, and we're only interested in ~20MB of data). requires the command line utils wget and jq
wget --base=https://github.com/raspberrypi/firmware/raw/master/ -i <( wget -qO - https://github.com/raspberrypi/firmware/tree/master/boot | jq -r '.payload.tree.items[].path | select(test("(elf|dat)$"))' )
@joepie91
joepie91 / no-your-cryptocurrency-cannot-work.md
Last active July 5, 2024 10:43
No, your cryptocurrency cannot work

No, your cryptocurrency cannot work

Whenever the topic of Bitcoin's energy usage comes up, there's always a flood of hastily-constructed comments by people claiming that their favourite cryptocurrency isn't like Bitcoin, that their favourite cryptocurrency is energy-efficient and scalable and whatnot.

They're wrong, and are quite possibly trying to scam you. Let's look at why.

What is a cryptocurrency anyway?

There are plenty of intricate and complex articles trying to convince you that cryptocurrencies are the future. They usually heavily use jargon and vague terms, make vague promises, and generally give you a sense that there must be something there, but you always come away from them more confused than you were before.