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@todgru
todgru / full-object-logging.js
Created Oct 9, 2019
javascript display entire object without truncating object depth
View full-object-logging.js
// to log an entire object without trucated depth:
console.dir(myDeeplyNestedObject, { depth: null });
View sunrise-sunset-algorithm.txt
From: https://edwilliams.org/sunrise_sunset_algorithm.htm
Sunrise/Sunset Algorithm
Source:
Almanac for Computers, 1990
published by Nautical Almanac Office
United States Naval Observatory
Washington, DC 20392
Inputs:
View iterator.js
const arr = [1, 2, 3, 4, 5, 6];
const iter = arr[Symbol.iterator]();
const foo = i => {
const v = i.next();
if (v.done) return "done!";
console.log("next!", v.value);
return foo(i);
};
foo(iter);
@todgru
todgru / rpi3-bt-keyboard.txt
Created Jun 30, 2019 — forked from tekemperor/rpi3-bt-keyboard.txt
Connect Apple Wireless Keyboard to Raspberry Pi 3 in Raspbian
View rpi3-bt-keyboard.txt
sudo service bluetooth status # Verify bluetooth is active.
sudo bluetoothctl # Lauch bluetooth subshell.
agent on # [No idea what this does.]
default-agent # [No idea what this does.]
scan on # Displays a list of available devices.
pair XX:XX:XX:XX:XX:XX # This prepares a potential connection, the X's represent your device ID
# A "PIN code" will be displayed, type it on the keyboard and press "enter".
trust XX:XX:XX:XX:XX:XX # Adds device to trusted devices, this survives reboot.
connect XX:XX:XX:XX:XX:XX # Connect to the device now.
exit # Return to previous shell.
@todgru
todgru / ssh.md
Last active Jun 19, 2019
enable ssh on raspberry pi raspian fresh install etcher OS X Mac network cable direct connect
View ssh.md
  • after image is flashed using Etcher, cd /Volumes/boot.
  • Then add ssh file to root. touch ssh.
  • connect network cable between os x computer and raspberry pi. boot the raspberry pi.
  • wait a minute.
  • then ssh pi@raspberrypi.local

That's it. No need for a screen, keyboard or any other device to get into the pi. :)

View gist:4ce29f55ea39be537b8eb69ae1792449
meteor shower intensity https://fireballs.ndc.nasa.gov/cmor-radiants/
View gist:5d0219bdd81ab3923a82f1b9e96e5254
good link to running ntp time server on rpi with gps https://robrobinette.com/pi_GPS_PPS_Time_Server.htm
@todgru
todgru / ffmpeg.md
Last active May 29, 2019
trim an mp3 from the command line cli using ffmpeg copies to new file, original undedited
View ffmpeg.md

trim an mp3

I record mp3s from a few streams. Sometimes the recordings do not stop on schedule. This command allows me to trim or trucate the mp3 file.

ffmpeg -i infile.mp3 -vn -acodec copy -ss 00:00:00 -t 01:00:34 outfile.mp3

installation on ubuntu 14.04

View module.js
function foo() {
console.log('foo');
}
function bar() {
foo();
}
module.exports = {
foo,
View paclink-unix-install.md
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