Tienson Qin tiensonqin

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).

Using OTP's observer (appmon replacement) remotely

$ ssh remote-host "epmd -names"
epmd: up and running on port 4369 with data:
name some_node at port 58769

Note the running on port for epmd itself and the port of the node you're interested in debugging. Reconnect to the remote host with these ports forwarded:

$ ssh -L 4369:localhost:4369 -L 58769:localhost:58769 remote-host

Parsing CSS file with monadic parser in Clojure

Inspired by "Parsing CSS with Parsec".

Just quick notes and code that you can play with in REPL.

By @kachayev

0. Intro

EuroClojure 2014, Krakow

Fergal Byrne, Clortex: Machine Intelligence based on Jeff Hawkins’ HTM Theory

@fergbyrne
HTM = Hierarchical Temporal Memory
Slides

big data

big data is like teenage sex
- noone knows how to do it
- everyone thinks everyone else is doing it

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

	(ns favila.datomic-util.restore-datoms
	"A \"manual\" datomic database restore.

	Writes raw datoms (stored in a stream written by d/datoms) to an empty database.
	Useful for memory databases: you can write out all the datoms in it, then read
	them into another database. (Note mem dbs have no log or retractions)."
	(:require [datomic.api :as d]
	[clojure.edn :as edn]))

	(defrecord datom [e a v tx added?])

	;; -- mode: clojure; --

	(set-env!
	:src-paths #{"src/clj" "src/cljs"}
	:rsc-paths #{"resources"}
	:update :always
	:dependencies '[[org.clojure/clojure "1.7.0-alpha4"]
	[org.clojure/core.async "0.1.346.0-17112a-alpha"]
	[com.taoensso/timbre "3.3.1-1cd4b70"]
	[http-kit "2.1.19"]

	(require '[clojure.core.async :as a])

	(def xform (comp (map inc)
	(filter even?)
	(dedupe)
	(flatmap range)
	(partition-all 3)
	(partition-by #(< (apply + %) 7))
	(flatmap flatten)
	(random-sample 1.0)