Tweag I/O - software innovation lab
We bring together experts in distributed systems, compilers and formal methods to build scalable designs at the lowest complexity budget. Bugs are tedious to spot. So we build programs that find bugs in other programs. State what behaviours you want - we'll automate the rest. We have your back with millions of test cases generated on-the-fly and automatic analysis at every save. That lets you cont
Haskell Programming
We're writing this book because many have found learning Haskell to be difficult and it doesn't have to be. Learning Haskell from the ground up is easier and works better - for both experienced hackers and people new to programming. The language is different enough from any you might've already tried that building up from the foundations will be less difficult and more enjoyable. If you are an exp
VOYAGE GROUP エンジニアブログ : Socket.IO サーバーを Haskell で書いて Yo っぽいものを作ろう
2014年08月08日15:02 カテゴリ Socket.IO サーバーを Haskell で書いて Yo っぽいものを作ろう こんにちは。adingo で広告配信のお手伝いをしている井手上です。今回のエンジニアブログは Haskell の Socket.IO サーバーライブラリを使って、Yo みたいなアプリケーションを作成した話です。 前置き 突然ですが、皆さんはお仕事や個人的な開発ではどんなプログラミング言語・ミドルウェア・プラットフォームを利用していますか？ Web アプリケーションを作るなら Python や Ruby 等のいわゆる Lightweight Language、大量のリクエストを高速に、並列に処理したいのなら Erlang など、目的に応じた選択肢があると思います。色々な選択肢がある中、以前は最適だと思って選択したものが、年々新しい技術がが出てきているために今ならもっ
What I Wish I Knew When Learning Haskell
What I Wish I Knew When Learning Haskell Version 2.5 Version This is the fifth major draft of this document since 2009. HTML Version Screen PDF Printable PDF EPUB Version Kindle Version Pull requests are always accepted for changes and additional content. This is a living document. The only way this document will stay up to date is through the kindness of readers like you and community patches and
GitHub - facebook/Haxl: A Haskell library that simplifies access to remote data, such as databases or web-based services.
Haxl is a Haskell library that simplifies access to remote data, such as databases or web-based services. Haxl can automatically batch multiple requests to the same data source, request data from multiple data sources concurrently, cache previous requests, memoize computations. Having all this handled for you behind the scenes means that your data-fetching code can be much cleaner and clearer than
A brief introduction to Haskell, and why it matters
Haskell is in some ways a nicer language for functional programming than Scala, and if you are serious about learning more FP, we recommend learning it. We recommend this even if you continue to program predominantly in Scala. Why? Many of the key ideas and structures covered in this book (for instance, most of parts 3 and 4) originated with research or work using Haskell. Throughout the chapter n
Haskellers
This is a parked page for haskellers.com and packdeps.haskellers.com. These sites were previously hosted by FP Complete, and are looking for a new home. If anyone is interested in picking these up, feel free to reach out to Michael Snoyman.
Hulk: A Haskell IRC server
Hulk is an working-and-work-in-progress IRC server. Github repo. Motivation Last Wednesday night I whipped up a simple IRC server in Haskell in about four hours. We have been long time sick of the poor quality of the Skype Linux implementation, which was, on the dev team, our main point of communication. We agreed something like IRC would be good, so I thought it would be easy in Haskell to make s
Lessons learning Haskell
Lessons learning Haskell It's often claimed that learning Haskell will make you a better programmer in other languages. I like the idea that there's no such thing as a good programmer, just a programmer who follows good practices. As soon as we stop following good practices we suck again. So, Haskell must introduce and indoctrinate better practices that we carry back to our other languages. Right
第51回 FunctorとMonadの間にあるApplicative
第3回でFunctorクラスとMonadクラスを紹介しましたが，ここ数年の間に，FunctorクラスとMonadクラスの関係に少し変化が起こりました。Functorクラスよりも強く，Monadクラスよりも弱いクラス，すなわちFunctorクラスとMonadクラスの中間に相当するApplicativeクラスが現れ，広く使われるようになったのです。特にパーサー・ライブラリでは，Applicativeクラスおよび「Applicative版のMonoid」であるAlternativeクラスが欠かせないものになっています。 第48回でのparTraversable関数の説明，および第50回で取り上げたparMap関数/parMapM関数の定義の文脈部分で登場したTraversableクラスも，Applicativeとのかかわりが深いクラスです。 Applicativeに対する理解は，今やHaskel
Haskell Is Exceptionally Unsafe | Existential Type
It is well known that Haskell is not type safe. The most blatant violation is the sometimes-necessary, and aptly named, unsafePerformIO operation. You are enjoined not to use this in an unsafe manner, and must be careful to ensure that the encapsulated computation may be executed at any time because of the inherent unpredictability of lazy evaluation. (The analogous operation in monadic ML, saf
Haskell Live: A Live Coding Adventure
Episode 2: Time To Refactor Wherein we review the code from our last episide, fix some bugs, alleviate some code smells, refactor some things to improve clarity and reduce redundancy, and introduce the concept of failed board parsing with error reporting. I've also posted a list of the tools I use to set up my environment. github Get the code! comment Discuss this episode on GitHub Issues! info We
How to write hybrid CPU/GPU programs with Haskell
What’s better than programming a GPU with a high-level, Haskell-embedded DSL (domain-specific-language)? Well, perhaps writing portable CPU/GPU programs that utilize both pieces of silicon—with dynamic load-balancing between them—would fit the bill. This is one of the heterogeneous programming scenarios supported by our new meta-par packages. A draft paper can be found here, which explains the mec
The Flying Frog Blog: Why is Haskell used so little in the industry?
Bugspy asked an interesting question on Stack Overflow recently: It is a wonderful, very fast, mature and complete language. It exists for a very long time and has a big set of libraries. Yet, it appears not to be widely used. Why ? I suspect it is because it is pretty rough and unforgiving for beginners, and maybe because its lazy execution makes it even harder Jeff Atwood, cofounder of Stack Ove
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