karlpokus

// https://stackoverflow.com/questions/27638402/strip-exif-data-from-image
// includes fiddle

function removeExif(res, cb) {
	const dv = new DataView(res);
	let offset = 0;
	let recess = 0;
	const pieces = [];
	let i = 0;

karlpokus

How to convert a SFC to something I can require?

• bundle.js does not work
• need to compile each part of the SFC individually

vue loader

• vue loader vue-loader is a loader for Webpack that can transform Vue components written in the following format into a plain JavaScript module vue-loader will parse the file, extract each language block, pipe them through other loaders if necessary, and finally assemble them back into a CommonJS module whose module.exports is a Vue.js component options object.
• vue loader configs

karlpokus

netcat

Duplex between to terminals

# start
$ nc -l 1234
# listen
$ nc 127.0.0.1 1234

Transfer files

karlpokus

setup

• one-click install
• sensitive file: wp-config.php
• new db user, OS user, wp user
• add ssh keys && Disable Password Authentication
• do mysql_secure_installation
• wp REST api
• http://ip/wp-login.php
• dir: /var/www/html
• The "ufw" firewall is enabled. All ports except for 22, 80, and 443 are BLOCKED.

karlpokus

Scale

• replica sets scales reads
• sharding scales read and writes

replica sets

• backup
• primary and secondary members
• oplog requires a replica set

primary member

karlpokus

react for dummies

• docs
• JSX produces React "elements" via React.createElement()
• wrap JSX in parens to get multiple lines
• element != component
• ok to have multiple root nodes
• React elements are immutable
• components are like functions. They accept arbitrary inputs (called "props") and return React elements describing what should appear on the screen.

Functional and Class Components

karlpokus

// assume <input id="files" type="file" multiple/>
var files = document.getElementById('files');
    files.addEventListener('change', processFiles, false);

function processFiles() {
  readFiles(this.files, upload);
}

function readFiles(files, cb) {
  var payloads = [];

karlpokus

geocoding

• https://developers.google.com/maps/documentation/geocoding/intro
• http://maps.google.com/maps/api/geocode/json?address=Karlsrogatan%2093B

calc distance

• http://stackoverflow.com/questions/365826/calculate-distance-between-2-gps-coordinates

karlpokus

// pkg: mysql
// https://github.com/mysqljs/mysql#performing-queries

var mysql = require('mysql'),
    connection = mysql.createConnection({
      host:'localhost',
      user:'bixa',
      password:'pwd',
      database:'foo'
    });

karlpokus

http://blog.smalleycreative.com/linux/setup-a-headless-raspberry-pi-with-raspbian-jessie-on-os-x/

setup

• download raspian lite 1.3G (no GIU pkgs)
• extract
• put empty ssh file in there somewhere
• sudo dd .. to write to SD card
• plug in power and ethernet to router
• find pi:s LAN IP
• ssh (pi:raspberry)