It's the same course/series, but with interactivity, so Haskell can coded/evaluated from the browser. In fact, one "dir" up, you will find a bunch of similar tutorials here : https://www.fpcomplete.com/school.

1. Yann Esposito's Haskell Fast and Hard (on FPcomplete -- https://www.fpcomplete.com/user/yogsototh/haskell-fast-hard)

2. Learn you a Haskell by Miran Lipovaca http://learnyouahaskell.com/

The latter author decided to write the book based on his experience in learning Haskell. It's definitely one of the simplest and clearest programming books I've read.

I've always learned languages because I need them for something. C/C++ because I wanted to write a game. Python because it's the complex scripting language of choice in Ubuntu. JavaScript for obvious reasons.

What I really really need is something which walks me through doing something significant with Haskell - like, a GUI app on Linux or something (my current focus: I've never really done it, but if I'm learning something new I'd like there to be a practical product at the end).

A bunch of language constructs, while technically interesting, don't help me to grok the language at all.

I'd still say the type system is there to help you in C, C++, and Java, it just doesn't do nearly as good a job of it, and winds up in your way more often because it's less expressive.

At university the first thing everyone had to (in programming) do was a Haskell course. Felt weird at the time, but in hindsight it was fantastic. It meant everyone had to throw their preconceptions about programming out the window.

It didn't occur to me until recently (10-15 years later), that functional concepts are actually a good thing to apply in any language; that it makes code parallelizable, modular, maintainable, testable, and so on. I just thought functional was functional (i.e. elegant but hard) whereas imperative was imperative (inelegant but easy). Much like the difference between algebra and arithmetic.

So go learn a second language, or even a third. Even if you intend to speak english and Java for the rest of your life. I'd choose Haskell and Spanish.

Off topic but does anyone know of a Rails/Play + Linq to SQL/ScalaQuery equivalent in Haskell?

Beyond that just being able to generate PDF invoices, send out emails and have access to a decent date/time library (like JodaTime) would cover the essentials for web development.

Did this stop you or how did get past it?

How does Learn Haskell Fast and Hard compare?

The selection of artwork is pretty nice too.

Very very good. Thank you author and poster.

I shared a number of work arounds with the general haskell community a few weeks ago here: http://www.haskell.org/pipermail/haskell-cafe/2013-September... (there are alternative work arounds, but I only listed the ones which are simple and easy to communicate with other people and be able to expect them to follow the steps correctly.)

Just skimmed through. I see that there is a bit of Javascript and C in the code too as reference matertial. Most people dont like such a way of teaching but it looks like the tutorial isnt really trying to teach Haskell in terms of Javascript or C. Really makes me want to look into this. Thanks for putting the efforts.

First of all, you should be using the `null` function instead of `== xs` because the `==` operator only works if your list contents are Eq-able.

But the most important thing is that pattern matching is more type safe. If you use `head` and `tail` you, as a programmer, need to make sure that you only call them on a non-empty lists or else you get an error. On the other hand, if you use pattern matching the compiler helps you make sure that you always covered all the possible cases (empty vs non-empty) and you never need to worry about calling the unsafe head and tail functions.

Although I am not sure about the premise - I doubt Haskell, as a language close to mathematics, can be learned fast. This tutorial seems quite shallow on some things, like monads.

  [1,3..10] ⇔ [1,3,5,7,9]