Discover gists

MySQL Cheat Sheet

Help with SQL commands to interact with a MySQL database

manuals: man(1), apropos(1)

See the following links for further updates to Github Desktop for Ubuntu. These are official instructions. (also mentioned by fetwar on Nov 3, 2023)

For the sake of "maintaining the tradition" here is the updated version.

	KAMAL_REGISTRY_PASSWORD=xxx
	RAILS_MASTER_KEY=xxxxxxxxxxxxxxx
	POSTGRES_PASSWORD=xxxxxxxxxxxxx
	REDIS_PASSWORD=my-redis-password
	REDIS_URL=redis://:my-redis-password@n28-redis:6379/1

	#!/usr/bin/env fish
	# similar script in Fish
	# still under construction, need to quiet `git status` more effectively

	function update -d 'Update git repo'
	git stash --quiet
	git pull
	git stash apply --quiet
	end

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	// Lines
	float hash( float n ) {
	return fract(sin(n)*753.5453123);
	}

	// Slight modification of iq's noise function.
	float noise(vector_float2 x )
	{
	vector_float2 p = floor(x);
	vector_float2 f = fract(x);

	// 3D Dom viewer, copy-paste this into your console to visualise the DOM as a stack of solid blocks.
	// You can also minify and save it as a bookmarklet (https://www.freecodecamp.org/news/what-are-bookmarklets/)
	(() => {
	const SHOW_SIDES = false; // color sides of DOM nodes?
	const COLOR_SURFACE = true; // color tops of DOM nodes?
	const COLOR_RANDOM = false; // randomise color?
	const COLOR_HUE = 190; // hue in HSL (https://hslpicker.com)
	const MAX_ROTATION = 180; // set to 360 to rotate all the way round
	const THICKNESS = 20; // thickness of layers
	const DISTANCE = 10000; // ¯\\_(ツ)_/¯