Katherine Giron Pe kathgironpe

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.

Editorial note

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

Hi Nicholas,

I saw you tweet about JSX yesterday. It seemed like the discussion devolved pretty quickly but I wanted to share our experience over the last year. I understand your concerns. I've made similar remarks about JSX. When we started using it Planning Center, I led the charge to write React without it. I don't imagine I'd have much to say that you haven't considered but, if it's helpful, here's a pattern that changed my opinion:

The idea that "React is the V in MVC" is disingenuous. It's a good pitch but, for many of us, it feels like in invitation to repeat our history of coupled views. In practice, React is the V and the C. Dan Abramov describes the division as Smart and Dumb Components. At our office, we call them stateless and container components (view-controllers if we're Flux). The idea is pretty simple: components can't


	#
	# Ubuntu 16.06 LTS (Xenial Xerus)
	#
	# Basic packages i usually install.
	#
	# Author: Julius Beckmann <[email protected]>
	#
	# Upgraded Script from 14.04: https://gist.github.com/h4cc/7be7f940325614dc59fb
	#

	import { combineReducers } from 'redux';
	import users from './reducers/users';
	import posts from './reducers/posts';

	export default function createReducer(asyncReducers) {
	return combineReducers({
	users,
	posts,
	...asyncReducers
	});

	var debug = process.env.NODE_ENV !== "production";
	var webpack = require('webpack');

	module.exports = {
	context: __dirname,
	devtool: debug ? "inline-sourcemap" : null,
	entry: "./js/scripts.js",
	output: {
	path: __dirname + "/js",
	filename: "scripts.min.js"

	ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
	# Don't add passphrase
	openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
	cat jwtRS256.key
	cat jwtRS256.key.pub

	defmodule ProgressiveDownloader do
	def run do
	url = "https://ia600308.us.archive.org/2/items/HealthYo1953/HealthYo1953_512kb.mp4"

	HTTPotion.get url, stream_to: self, timeout: :infinity

	receive_data(total_bytes: :unknown, data: "")
	end

	defp receive_data(total_bytes: total_bytes, data: data) do