5 Free E-Books on Haskell
There's been a lot of love lately for Clojure (which Heroku now supports), Scala (used at Twitter among other places) and Erlang (used by Facebook among other places). But if you're interested in functional programming, don't forget about Haskell. Try Haskell Before checking out the books below, you can check out Try Haskell an interactive, browser based tutorial. This will give you an overview of
Curry’n’C Converter — Using Haskell with Objective-C in the Classic Cocoa Tutorial
Using the classic “Currency Converter” Objective-C tutorial application as an example I show how to implement the model layer of a Cocoa application in Haskell: I explain how to modify the standard Xcode project for building a mixed Haskell/Objective-C application. I create an Objective-C wrapper class for the Haskell model part that hides the Haskell implementation from the Objective-C controller
Chapters - Learn You a Haskell for Great Good!
Introduction About this tutorial So what's Haskell? What you need to dive in Starting Out Ready, set, go! Baby's first functions An intro to lists Texas ranges I'm a list comprehension Tuples Types and Typeclasses Believe the type Type variables Typeclasses 101 Syntax in Functions Pattern matching Guards, guards! Where!? Let it be Case expressions Recursion Hello recursion! Maximum awesome A few m
Haskell programming tips- 他人のHaskell日記 - haskell
はてなグループの終了日を2020年1月31日(金)に決定しました 以下のエントリの通り、今年末を目処にはてなグループを終了予定である旨をお知らせしておりました。 2019年末を目処に、はてなグループの提供を終了する予定です - はてなグループ日記 このたび、正式に終了日を決定いたしましたので、以下の通りご確認ください。 終了日: 2020年1月31日(金) エクスポート希望申請期限:2020年1月31日(金) 終了日以降は、はてなグループの閲覧および投稿は行えません。日記のエクスポートが必要な方は以下の記事にしたがって手続きをしてください。 はてなグループに投稿された日記データのエクスポートについて - はてなグループ日記 ご利用のみなさまにはご迷惑をおかけいたしますが、どうぞよろしくお願いいたします。 2020-06-25 追記 はてなグループ日記のエクスポートデータは2020年2月28
All About Monads
All About Monads A comprehensive guide to the theory and practice of monadic programming in Haskell Version 1.1.0 This tutorial aims to explain the concept of a monad and its application to functional programming in a way that is easy to understand and useful to beginning and intermediate Haskell programmers. Familiarity with the Haskell language is assumed, but no prior experience with monads i
λ Tony’s blog λ » Blog Archive » Haskell exercises for beginners
The exercises below are similar to my previous ‘Scala exercises for beginners’, except the rules a little clearer. For those of who have emailed me or submitted responses here on the blog, I will get around to providing you feedback, however, I’d prefer to do so on the revised version of the Exercises since then I can maintain a bit of clarity in explaining the solutions; specifically, why one may
HXT Arrow Lesson 0: Arrows
What Are Arrows? Many Haskellers begin by asking "what are arrows?" I won't answer this question. It distracts from the theory and practice. First Arrow Program Take a deep breath. Now we plunge right into our first program using arrows. Don't panic! It is short, and I will explain what it does and why. So, take a deep breath again, and here we go! You can also download it as lesson-0.hs. import T
Learn You a Haskell for Great Good!
Hey yo! This is Learn You a Haskell, the funkiest way to learn Haskell, which is the best functional programming language around. You may have heard of it. This guide is meant for people who have programmed already, but have yet to try functional programming. The whole thing is completely free to read online, but it's also available in print and I encourage you to buy as many copies as you can aff
モナディック・パーサー - あどけない話
「ふつうのHaskellプログラミング」や 「構文解析結合子」の元ネタは、どうやら「Monadic parsing in Haskell」のようです。(さらに元ネタは Parsec ですかね。) このオリジナルは、MonadPlus の部分などが古くさいのですが、分りやすいです。というわけで、例題を Parsec 風にアレンジしつつ、勉強してみました。 四則演算式のパーサーを実現することを目標にします。 おまじない 最終的に以下のモジュールが必要になるので、import しておきます。 import Monad import Data.Char Parser の定義 Parser 型の定義はこうなります。 data Parser a = Parser (String -> [(a,String)]) 状態を表すために関数を使っている 関数を使うと状態が表現できることが分らない人は、先に「状
Haskell Monad Tutorial
The Greenhorn's Guide to becoming a Monad Cowboy Saddle up Round 'em up Brand 'em Maybe State List Reader IO Breed 'em StateT WriterT Drive 'em Copyrights Howdy! You all are probably wondering why this guide, when there are so many fine monad tutorials out there already. Well, I've noticed some people on the Haskell trail (and in the saloon) still talk of them monads like they were rattlesnakes ha
Monads through Pictures
Introduction Monads in functional programming provide a framework for aspect-aware computations to be composed to build higher-level aspect-aware computations. An aspect-aware computation is some basic computation that has been enhanced, augmented, or, more generally, just transformed, to become aware of some generic concern. Consider, for example, the well-known maybe monad. This monad pr
Playing with monad transformers
Yesterday someone posted a link to a great monad transformers tutorial. It's incredible. I think I finally start to understand (or at least being able to use) it. As part of testing my fresh knowledge I've written a simple virtual machine for a Forth-like language. Code (as usual - Literate Haskell, so you can just put it into .lhs file and run it) below. Enjoy! > module Main where > > import Cont
Real World Haskell
Why functional programming? Why Haskell? 1. Getting started 2. Types and functions 3. Defining types, streamlining functions 4. Functional programming 5. Writing a library: working with JSON data 6. Using typeclasses 7. Input and output 8. Efficient file processing, regular expressions, and file name matching 9. I/O case study: a library for searching the filesystem 10. Code case study: parsing a
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