Juan Manuel Gimeno jmgimeno

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

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.

Om, React and ClojureScript

Om -- ClojureScript interface to Facebook's React

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

Organizing Clojure Projects

Presented by @stuartsierra

Stuart presented using a deck created with org-html-slideshow, a Clojure library for formatting org-mode notes as HTML slides.

General Code Structure / Organization

Be careful not to make function calls across component boundaries.
Protocols should be minimalistic. They should have the fundamental operations of your component.

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

Command Line Tools for Xcode

Command line tools comes bundle with Xcode prior to 4.3 version. After 4.3, you need to install a separated command line tools yourself.

First, go to this url and login using Apple Developer account (Free to register)

https://developer.apple.com/downloads/index.action

	sealed trait Interact[A]

	case class Ask(prompt: String)
	extends Interact[String]

	case class Tell(msg: String)
	extends Interact[Unit]

	trait Monad[M[_]] {
	def pure[A](a: A): M[A]

	<html>
	<head>
	<script src="out/goog/base.js" type="text/javascript"></script>
	<script src="hello_world.js" type="text/javascript"></script>
	<script type="text/javascript">goog.require("hello_world.core");</script>
	</head>
	<body>
	</body>
	<script type="text/javascript">hello_world.core.run()</script>
	</html>

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD