Feifan Zhou feifanzhou

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).

These are the Kickstarter Engineering and Data role definitions for both teams.

Technical	Data	People
Junior Software Engineer
Software Engineer	Data Analyst
Senior Software Engineer	Data Scientist	Engineering Manager
Staff Engineer	VP of Data	Engineering Director
Principal Engineer		CTO

A composable pattern for pure state machines with effects

State machines are everywhere in interactive systems, but they're rarely defined clearly and explicitly. Given some big blob of code including implicit state machines, which transitions are possible and under what conditions? What effects take place on what transitions?

There are existing design patterns for state machines, but all the patterns I've seen complect side effects with the structure of the state machine itself. Instances of these patterns are difficult to test without mocking, and they end up with more dependencies. Worse, the classic patterns compose poorly: hierarchical state machines are typically not straightforward extensions. The functional programming world has solutions, but they don't transpose neatly enough to be broadly usable in mainstream languages.

Here I present a composable pattern for pure state machiness with effects,

Genomics - A programmer's guide.

Andy Thomason is a Senior Programmer at Genomics PLC. He has been witing graphics systems, games and compilers since the '70s and specialises in code performance.

https://www.genomicsplc.com

	#!/bin/bash
	#####################################################
	# Name: Bash CheatSheet for Mac OSX
	#
	# A little overlook of the Bash basics
	#
	# Usage:
	#
	# Author: J. Le Coupanec
	# Date: 2014/11/04

	AllCops:
	RunRailsCops: true

	# Commonly used screens these days easily fit more than 80 characters.
	Metrics/LineLength:
	Max: 120

	# Too short methods lead to extraction of single-use methods, which can make
	# the code easier to read (by naming things), but can also clutter the class
	Metrics/MethodLength:

	[
	{
	"Name": "Eros",
	"Author": "Conal Elliott",
	"Status": "Experiment",
	"Updated": "2007-11",
	"Description": "functional programming with isomorphic GUI",
	"URL": "http://conal.net/papers/Eros/"
	},
	{

	#!/bin/zsh
	# Fix Safari Favorites Icons

	CS="cache_settings"; TIC="Touch Icons Cache"; DIR="$HOME/Library/Safari/$TIC/Images"
	DB="$DIR/../${${TIC// }%%s*}${${(C)CS}//_}.db"; SQL=$(sqlite3 "$DB" "SELECT host FROM $CS")
	sqlite3 "$DB" "UPDATE $CS SET ${${${(L)TIC// /_}#*_}//s/_is_in}=1, download_status_flags=1"
	for png in "$1"/*.png; do URL="$(plutil -convert xml1 -o - "$DIR/../../Bookmarks.plist" \| \
	awk -F '[</>]' -v name="${${png##/}%%.}" '$3~name{getline;getline;getline;print $5}')"; \
	cp -f -v "$png" "$DIR/${(U)$(md5 -q -s $URL)}.png"; done; chflags -v uappnd $DIR $DB*

	addEventListener('fetch', event => {
	event.respondWith(fetchAndCheckPassword(event.request))
	})

	async function fetchAndCheckPassword(req) {
	if (req.method == "POST") {
	try {
	const post = await req.formData();
	const pwd = post.get('password')
	const enc = new TextEncoder("utf-8").encode(pwd)