Quet Zal quetz

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

Profiling performance

Using perf:

$ perf record -g binary
$ perf script | stackcollapse-perf.pl | rust-unmangle | flamegraph.pl > flame.svg

NOTE: See @GabrielMajeri's comments below about the -g option.

The Problem

Defining records in Haskell causes accessor functions for the record's fields to be defined. There is no seperate namespace for these accessor functions.

The Goal

Be able to

use records in Haskell, which share field names.
use lenses for accessing these fields

How to setup Vortex Race 3 for Mac with latest (on 2020-01-05) firmare V1.02.05.

For better understanding we will use the following naming convention:

  [ L1 ][ L2 ][ L3 ][ Space ][ R1 ][ R2 ][ R3 ]

Reset everything by pressing L3+R1 for 5 seconds. Left LED will blink white color while you're holding the keys. Release them after it stopeed blinking.
Get into one of the programmable layers (R2+RShift) – I like red, the super bright laser LED is the least super annoying in red.
Put the keyboard in Windows Mode (Pn+W), it's the least problematic one.

Absolution Gap - Alastair Reynolds
Abundance - Peter H Diamandis
Advances in Active Portfolio Management - Richard Grinold
Advances in Unconventional Computing - Andrew Adamatzky
Creating Modern Capitalism - Thomas Mccraw
Exhalation - Ted Chiang
From Bacteria to Bach and Back - Daniel C. Dennett
Human Compatible - Russell Stuart
Look To Windward - Iain M. Banks
Lost in Math - Sabine Hossenfelder

	-- show running queries (pre 9.2)
	SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
	FROM pg_stat_activity
	WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
	ORDER BY query_start desc;

	-- show running queries (9.2)
	SELECT pid, age(clock_timestamp(), query_start), usename, query
	FROM pg_stat_activity
	WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'

	#!/bin/bash
	IPT="/sbin/iptables"

	# Server IP
	SERVER_IP="$(ip addr show eth0 \| grep 'inet ' \| cut -f2 \| awk '{ print $2}')"

	# Your DNS servers you use: cat /etc/resolv.conf
	DNS_SERVER="8.8.4.4 8.8.8.8"

	# Allow connections to this package servers

	#Put me in /lib/systemd/system/
	[Unit]
	Description=My Miscellaneous Service
	After=network.target

	[Service]
	Type=simple
	User=nanodano
	WorkingDirectory=/home/nanodano
	ExecStart=/home/nanodano/my_daemon --option=123

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048