Pedro Furlanetto pedrofurla

This blog post series has moved here.

You might also be interested in the 2016 version.

Introduction

At DICOM Grid, we recently made the decision to use Haskell for some of our newer projects, mostly small, independent web services. This isn't the first time I've had the opportunity to use Haskell at work - I had previously used Haskell to write tools to automate some processes like generation of documentation for TypeScript code - but this is the first time we will be deploying Haskell code into production.

Over the past few months, I have been working on two Haskell services:

A reimplementation of an existing socket.io service, previously written for NodeJS using TypeScript.
A new service, which would interact with third-party components using standard data formats from the medical industry.

I will write here mostly about the first project, since it is a self-contained project which provides a good example of the power of Haskell. Moreover, the proces

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.

As compiled by Kevin Wright a.k.a @thecoda

(executive producer of the movie, and I didn't even know it... clever huh?)

please, please, please - If you know of any slides/code/whatever not on here, then ping me on twitter or comment this Gist!

This gist will be updated as and when I find new information. So it's probably best not to fork it, or you'll miss the updates!

Monday June 16th

Scalawags #15

starring an Englishman and three hicks from flyover country who don't know Latin

Intro (0:00)

Daniel mistakenly calls Dick "Bill"
Josh is so excited about Scala 2.11 his tongue is stuck permanently out

	{-# LANGUAGE GADTs #-}
	{-# LANGUAGE TypeFamilies #-}
	{-# LANGUAGE RankNTypes #-}
	{-# LANGUAGE KindSignatures #-}
	{-# LANGUAGE PolyKinds #-}
	{-# LANGUAGE DataKinds #-}
	{-# LANGUAGE ScopedTypeVariables #-}

	data VarKind t = Bound \| Free t

	def test = {
	lazy val x = {
	println(s"lazy compute called")
	Thread.sleep(1000*30)
	1
	}
	x
	}
	def mRun = {
	import scala.concurrent.ExecutionContext.Implicits.global

	{-# LANGUAGE MultiParamTypeClasses #-}
	{-#LANGUAGE FlexibleInstances #-}
	module CanBuildFrom where

	import Data.Foldable
	import Data.Map

	data Builder from elem to = Builder {
	result :: to,
	add :: elem -> Builder from elem to

	(*
	Installation instructions
	=========================

	Run as an Application:
	1) Open AppleScript Editor and create a new script
	2) Paste this file into it
	3) Save name it '§(Toggle Wi-Fi)'
	- Or substitute '§' for a symbol that you can press with a single key
	4) Put it in Applications/Utilities