jens-a-e

// A one liner to convert a decimal MIDI note pitch to human readable notation
const midiNote2Name = (i, offset=-2) => `${["C","C#","D","D#","E","F","F#","G","G#","A","A#","B"][i%12]}${Math.floor(i / 12) + offset}`

jens-a-e

#!/bin/sh
# This script prefixes every Markdown file in the current directory with the timestamp of its birth.
# Such a prefix is common in file based note taking systems such as digital Zettelkasten.
# Future improvements could check if the timestamp exists to avoid duplication.

for file in *.md; do mv $file $(stat -f %SB-%N -t '%Y%m%d%H%M%S' $file); done

jens-a-e

# Recursively remove the 'Icon?' file from an orphaned GoogleDrive folder
find . -name 'Icon?' -type f -print -exec rm -rf '{}' \;

jens-a-e

Raspberry Pi Notes

# Final Version to launch on second screen. The spaces in the options with ":" are important!
vlc v4l2:///dev/video0:input=0 :v4l2-standard=PAL :input-slave=pulse://alsa_input.usb-Hauppauge_Hauppauge_Device_0014080666-01.stereo-fallback :live-caching=300 --demux rawvideo --qt-fullscreen-screennumber=1 --aspect-ratio=16:9 --autoscale --fullscreen

There is some more from the VLC gui:

jens-a-e

# Meditating on Steve
# -------------------
# Modified Piano Phase from Steve Reich, based on an Example of Sonic Pi
# Written by Jens, listened to by all
# Muthesius Academy of Fine Arts & Design
# Seminar 'Poetische Apparate', Summer Term 2016
#
# To run: paste this code into Sonic Pi - http://sonic-pi.net

use_synth :fm

jens-a-e

/*
  An approach on using attachInterrupt with multiple instances of a class
  jens@lea.io, march 2013
 */


// *** The following classes should be put into external files...

#define MAX_IRQ_CLASSES 8

jens-a-e

boolean withinPosition(float lat, float lon, float tolarance) {
    float gpsLat, gpsLong;
    // read gps...
    tolarance = tolarance / 1000.0; // 10 => 0.0010
    // Check position within tolarance
    boolean isLat = lat >= gpsLat - tolarance && lat <= gpsLat+tolarance;
    boolean isLon = lon >= gpsLon - tolarance && lon <= gpsLong+tolarance;
    return isLat && isLon;
}

jens-a-e

JS Cheatsheet

Coding Basics

Bevor es losgeht, ein paar hilfreiche Tips, die das Schreiben von Javascript Code erleichtern können:

//

Zwie / leiten einen Kommentar ein, nutze es Zeilen auszuschalten oder Kommentare einzufügen.

jens-a-e

# Make sure you have installed libxml2 via IPKG before like this:
# ipkg update && ipkg install libxml2

gem install nokogiri --version 1.5.10 -- --with-xml2-include=/opt/include/libxml2 --with-xml2-lib=/opt/lib

jens-a-e

Keybase proof

I hereby claim:

• I am jens-a-e on github.
• I am notaus (https://keybase.io/notaus) on keybase.
• I have a public key ASAne364bc_84s8Yu9IWX6AjSvmw2cW_0Sv1LVhYZJoKZQo

To claim this, I am signing this object: