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Six months ago I released the first "State of the Haskell Ecosystem", a collaborative wiki documenting the maturity of the Haskell language for various application domains: State of the Haskell Ecosystem The primary goals of this wiki are to: Advertise what areas the Haskell language and ecosystem excel at Warn newcomers about common pitfalls so they avoid unpleasant surprises Give new contributor
The Joy and Agony of Haskell in Production There have been several good talks about using Haskell in industry lately, and several people asked me to write about my personal experiences. Although I can’t give specific details I will speak broadly about some things I’ve learned and experienced. The myths are true. Haskell code tends to be much more reliable, performant, easy to refactor, and easier
It’s no secret I’m into Haskell. Two years ago a friend introduced me to what I then affectionately called “moon language,” and it’s been a continuous experience of learning, cursing, and joy ever since. Loving the language is easy; finding a team who shares this functional programming passion and uses it to build their core product is more rare. That’s what I found at Wagon and I’d like to share
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
What if I told you that a spreadsheet could be a library instead of an application? What would that even mean? How do we distill the logic behind spreadsheets into a reusable abstraction? My mvc-updates library answers this question by bringing spreadsheet-like programming to Haskell using an intuitive Applicative interface. The central abstraction is an Applicative Updatable value, which is just
素数, primes. 数学者を魅了してやまない数たち. その中でも, 特徴のある素数たちがいます. 双子素数, 三つ子素数, 四つ子素数, いとこ素数, セクシー素数,.... 何がセクシーなんでしょうか? 気になります!!! 順番に計算しつつ見ていきましょう. 今回もHaskellのprimesパッケージ*1を用いてみます. 自分で実装するのより高速であろうことを期待して. Prelude> :m Data.Numbers.Primes Prelude Data.Numbers.Primes> 素数の数 素数は, 無限個あります. もしそうでなければ, これほどの魅力はなかったことでしょう. 素数が無限個あることの証明は, あのユークリッドの証明が有名ですが, 次のような証明もあります. リーマンゼータ関数は, となっています. ところでは無理数でです. 仮に素数が有限個しかなければは
Inspirations & experiments, mainly about denotative/functional programming in Haskell There is a lot of confusion about the meaning of “functional” and “declarative” as descriptions of programming languages and paradigms. For instance, Haskell is sometimes advertised as a “purely functional programming language” and other times as “the world’s finest imperative programming language”. I added some
Several people asked me to write something linkable about my recent name and gender change, so here's an initial sketch. All four names (original/new * Chinese/English) are listed on the Wikipedia page about me. The new names had replaced original ones in my passport and national ID card (yes, .tw does have such things), so legal documents -- including copyright notices -- need to carry the new na
(2005.7.18 新規作成, 2009.1 更新。) 関数型プログラミングのための言語 Haskell について。 [2022-09] 処理系が GHC --The Glasgow Haskell Compiler-- だけになってしまってずいぶん経つ。仕様も Haskell 2010 language 以降、纏められなくなってしまった。見通しはあまり明るくない。 Haskell とは (2008.11.7 この節を追加。) 関数型プログラミング 例えばC言語でもオブジェクト指向プログラミングができます (gtk+など) が、プログラミング言語の支援があったほうが自然にプログラミングできます。 Haskell あるいはほかの関数型プログラミング言語 (Clean, O'Caml, Scala, Erlang など)は、関数型プログラミングがしやすいようなプログラミング言語です。程度問題
会誌「情報処理」連載の「プログラム・プロムナード」(2002年4月〜2005年3月掲載)と「Haskellプログラミング」(2005年4月〜2006年3月掲載)はどなたでもご覧になれます。ファイルはすべてPDF形式です。 「Haskellプログラミング」に掲載されたプログラムは http://www.sampou.org/haskell/ipsj/ から取ることができます.
Let op! Internet Explorer wordt niet meer ondersteund. Hierdoor kan de website mogelijk niet goed functioneren, gebruik een alternatieve browser om optimaal gebruik te maken van deze website. Klik hier om een alternatieve browser te downloaden. When software quality is more than a code checker Software quality does not arise from simply running a code checker: it requires strategy, oversight, and
John Hughes This paper dates from 1984, and circulated as a Chalmers memo for many years. Slightly revised versions appeared in 1989 and 1990 in the Computer Journal and the Year of Programming. This version is based on the original Chalmers memo nroff source, lightly edited for LaTeX and to bring it closer to the published versions. Please excuse the slightly old-fashioned type-setting, and the
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