Luis betancourtl

Two way iframe communication

The main difference between the two pages is the method of sending messages. Recieving messages is the same in both.

Parent

Send messages to iframe using iframeEl.contentWindow.postMessage Recieve messages using window.addEventListener('message')

iframe

ES6 JavaScript Compose Function

Definition

const compose = (...fns) =>
  fns.reduceRight((prevFn, nextFn) =>
    (...args) => nextFn(prevFn(...args)),
    value => value
 );

How to get puppet 6.3 up and running on a raspberry pi running raspbian.

These instructions were tested on a pi 3 with the latest version of raspbian (Raspbian GNU/Linux 9.8 (stretch)).

This guide assumes basic competency with the command line. It also assumes you have a functional puppet master set up with the hostname of puppet. If you can ping puppet, you should be all set. Also note that I am just getting into puppet and am not a master of this domain. There may be errors, and there is probably a better way to do this, but in my searching, I was unable to locate a good set of instructions to get this working, so here we are. Feel free to contact me for corrections.

You can either switch to root sudo -i, or prepend all the following commands with sudo.

Update first

apt update

	# === Optimized my.cnf configuration for MySQL/MariaDB (on Ubuntu, CentOS, Almalinux etc. servers) ===
	#
	# by Fotis Evangelou, developer of Engintron (engintron.com)
	#
	# ~ Updated September 2024 ~
	#
	#
	# The settings provided below are a starting point for a 8-16 GB RAM server with 4-8 CPU cores.
	# If you have different resources available you should adjust accordingly to save CPU, RAM & disk I/O usage.
	#

	function convertMS( milliseconds ) {
	var day, hour, minute, seconds;
	seconds = Math.floor(milliseconds / 1000);
	minute = Math.floor(seconds / 60);
	seconds = seconds % 60;
	hour = Math.floor(minute / 60);
	minute = minute % 60;
	day = Math.floor(hour / 24);
	hour = hour % 24;
	return {