MichaelDimmitt

This will be an ongoing list for personal reference.

IsaacG - from exercism https://exercism.org/tracks/bash/exercises/hamming/solutions/IsaacG

The && and || in bash are short-circuit logical operators. They quit evaluating as soon as possible.

a && b will only run b if a is true. a || b will only run b if a is false. a || b || c will stop as soon as anything is true. a && b || c will run a and ... b or c or both!! This is why a full blown if-else is often a good idea.

( is a subprocess. The exit status of the subprocess does propagate to the parent shell. If you got set -e (not recommended), you'd get its exit status. But a subshell cannot exit the parent shell.

Mac Computer

system commands

navigation
hold fn hold control f2 - navigate to toolbar menu
fn - mission control
text cursor - emacs stamdard
ctrl a - go to beginning
ctrl e - go to end

brew install postgresql;
brew services start postgresql;

psql: error: FATAL: database "michaeldimmitt" does not exist

psql postgres;
postgres=# CREATE DATABASE michaeldimmitt with OWNER michaeldimmitt;

Deploy surge with cors enabled and https

npm install -g surge
yarn build;
cp build/index.html build/200.html;
echo '*' > build/CORS;
surge build appname.surge.sh

Some links people beginners found as helpful that were learning:

Javacsript
Terminal commands (linux/unix)
Css

Javascript

Things that return false in javascript

https://developer.mozilla.org/en-US/docs/Glossary/Falsy

1) learned some new html today

Looking at youtube blog, https://youtube-eng.googleblog.com/2018/08/control-your-360-videos-with-youtube.html

ran into the following code:

<!--[if IE]>
  <script type="text/javascript" 
    src="https://www.blogger.com/static/v1/jsbin/1277698886-ieretrofit.js"

Everyone seems to know this, but here is a good refresher in case I ever forget.

  useEffect(() => { console.log('I am a component, 1 render') }, [true]);

Pointed empty array works you dont need true, My paranoid self thought that I read in the documentation that empty array would track all. This was not the case.

  useEffect(() => { console.log('I am a component, 1 render') }, []);

https://stackoverflow.com/a/332445/5283424

function a() { this.foo = 1;}
function b() { this.bar = 2; }
b.prototype = new a(); // b inherits from a
var f = new b();

function type(obj){
 return Object.prototype.toString.call(obj).match(/\s\w+/)[0].trim()

Today I learned, when to use:

  event.preventDefault();
  event.stopPropagation();

Ever need to have a click event on a child element trigger but not on the parent element?

Anyone use event.preventDefault on a regular basis?

Found a really good explanation with working examples on stack overflow 🎉

	#!/usr/bin/env bash
	#{{{ MARK:Header
	#**************************************************************
	##### Author: JACOBMENKE
	##### Date: Mon Jul 10 12:10:25 EDT 2017
	##### Purpose: bash script to contain open, copy and paste commands
	##### Notes:
	#}}}***********************************************************

	if [[ -z "$ZPWR_OS_TYPE" ]]; then