Keming kemingy

crontab

ps aux | grep crond

minute / hour / day of month / month / day of week / user / command
* means all, */n means every n
* * * * * user /path/to/cronscripts.sh >> /tmp/cron.log 2>&1 redirects STDERR to STDOUT

mutex
- locking mechanism
- only the owner can release the lock
- recursive mutex can be locked more than once (POSIX complaint systems)
semaphore
signaling mechansim

All People Seem To Need Data Processing

InnoDB (default)
- transaction-safe (ACID compliant) (commit, rollback, crash recovery)
- row-level lock and Oracle-style consistent nonlocking reads
MyISAM

	local wezterm = require 'wezterm';

	function recompute_padding(window)
	local window_dims = window:get_dimensions();
	local overrides = window:get_config_overrides() or {}

	if not window_dims.is_full_screen then
	if not overrides.window_padding then
	-- not changing anything
	return;

	import os
	import multiprocessing as mp


	data = {
	"msg": "hello world",
	}


	class Demo:

	def duration_to_seconds(duration: str):
	"""convert duration string to seconds"""
	unit_to_seconds = {
	"ns": 1e-9,
	"µs": 1e-6,
	"ms": 1e-3,
	"s": 1,
	"m": 60,
	"h": 3600,
	}

	import pickle
	import numpy as np


	img = np.random.rand(3, 1000, 1000)
	data = img.tobytes()


	def dump(arr):
	return pickle.dumps((arr.tobytes(), arr.dtype, arr.shape))