marble cyber-murmel

Usecase

Let's say there is a band on bandcamp you like and you would like to listne to their music even if zou are online. You may already know youtube-dl, but it's tedeous to download all the albums individually.

Code

First let's define a function that returns all the links to every album of one band.

bandcamp_album_links () {
        BAND=$(echo $1 | grep -Po 'https?://\w+\.bandcamp\.com')
        for ALBUM in $(curl -s $BAND/music | grep -Po '/album/[\w-]+')
 do

Recursive File Integrity Checking using `openssl dgst`

Checksumming

Use find to iterate trought all subdirectories of the given path (./). openssl dgst -sha256 each file in each directory and add the output to the SHA256 file in the corresponding directory.

find ./ -type d -exec sh -c 'cd "{}"; find ./ -maxdepth 1 -type f -not -name SHA256 -exec openssl dgst -sha256 \{\} + | sort -u | tee SHA256' \;

Checking

EE & CE Resources

:::info This is a compiliation of useful links on the topic of electrical and computer engineering. This isnt' a comprehensive list. Feel free to add links to resources you found useful yourself.

:::

:::info

	# front = ./grb/cnc_test-F.Cu.gbr
	back = ./grb/cnc_test-B.Cu.gbr
	outline = ./grb/cnc_test-Edge.Cuts.gbr
	drill = ./grb/cnc_test-PTH.drl
	output-dir = ./cnc

	# common
	metric = yes
	metricoutput = yes
	zsafe = 5

	```
	ctrl_interface=/run/wpa_supplicant

	### key_mgmt=NONE

	network={
	ssid="hamburg.freifunk.net"
	key_mgmt=NONE
	priority=0
	}

	ctrl_interface=/run/wpa_supplicant

	### key_mgmt=NONE

	network={
	ssid="hamburg.freifunk.net"
	key_mgmt=NONE
	priority=0
	}

	# -- coding: utf-8 --

	# Copyright 2020 by https://badge.team/
	# This file is released under the "CC0 1.0 Universal" license.
	# https://creativecommons.org/publicdomain/zero/1.0/legalcode

	from machine import Pin, SPI
	import wifi, urequests, sys

	# Pins

	# -- coding: utf-8 --

	# Copyright 2020 by https://badge.team/
	# This file is released under the "CC0 1.0 Universal" license.
	# https://creativecommons.org/publicdomain/zero/1.0/legalcode

	from machine import Pin, SPI

	# Pins
	pin_reset = Pin(16, Pin.OUT)

	# each datamatrix size can fit as many numbers as according to the following dict
	# a non-number letter needs double as much space as a number
	# an emoji need 16x as much space as a number 😂
	size_capacity_maps = {
	'square': {
	'10x10': 6, '12x12': 10, '14x14': 16, '16x16': 24,
	'18x18': 36, '20x20': 44, '22x22': 60, '24x24': 72,
	'26x26': 88, '32x32': 124, '36x36': 172, '40x40': 228,
	'44x44': 288, '48x48': 348, '52x52': 408, '64x64': 560,
	'72x72': 736, '80x80': 912, '88x88': 1152, '96x96': 1392,

	{ pkgs ? import <nixpkgs> {} }:

	let
	fixWrapper = pkgs.runCommand "fix-wrapper" {} ''
	mkdir -p $out/bin
	for i in ${pkgs.gcc.cc}/bin/-gnu-gcc; do
	ln -s ${pkgs.gcc}/bin/gcc $out/bin/$(basename "$i")
	done
	for i in ${pkgs.gcc.cc}/bin/-gnu-{g++,c++}; do
	ln -s ${pkgs.gcc}/bin/g++ $out/bin/$(basename "$i")