Rust vs. Haskell
Rust and Haskell don’t shy away from powerful features. As a result, both languages have steep learning curves when compared with other languages. Trying to learn Rust or Haskell can be frustrating, especially in the first couple of months. But if you already know Rust, you have a head start with Haskell; and vice versa. In this article, we want to show how knowledge of one of these languages can
The Expression Problem - maoeã®ãƒ–ãƒã‚°
ã“ã®è¨˜äº‹ã¯Haskell Advent Calendar jp 2010 : ATNDå‘ã‘ã«æ›¸ã„ãŸã‚‚ã®ã§ã™ã€‚ 最近ã€ãµã‚‰ãµã‚‰ã¨ãƒãƒƒãƒˆã®æ³¢ã‚’ã•ã¾ã‚ˆã£ã¦ã„ãŸã‚‰ã€Channel 9ã§Ralf Laemmelã•ã‚“ãŒHaskellã®åž‹ã‚¯ãƒ©ã‚¹ã‚’解説ã™ã‚‹å‹•ç”»ã‚’見ã¤ã‘ã¾ã—ãŸã€‚ã“ã‚Œã§ã™ã€‚ C9 Lectures: Dr. Ralf Lämmel - Advanced Functional Programming - The Expression Problem | Going Deep | Channel 9 C9 Lectures: Dr. Ralf Lämmel - Advanced Functional Programming - Type Classes | Going Deep | Channel 9 The Expression Problemã¨å‘¼ã°ã‚Œã‚‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«ãŠã‘ã‚‹å¤å…¸çš„ãªå•é¡Œã‚’ãƒã‚¿ã«
The ghc-vis User Guide
ghc-vis is a tool to visualize live Haskell data structures in GHCi. Evaluation is not forced and you can interact with the visualized data structures. This allows seeing Haskell’s lazy evaluation and sharing in action. Functional programming languages like Haskell offer a way to write well-structured software, which is easy to understand and still performs well. In order to achieve this one has t
「関数プãƒã‚°ãƒ©ãƒŸãƒ³ã‚° ç 玉ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ デザインã€ã‚’Scalaã§å®Ÿè£…ã—ã¦ã¿ã‚‹ ç¬¬ï¼’ç« - セカイノカタãƒ
先日〠Scala Advent Calendar 2014 - Qiita ã§ã€Œé–¢æ•°ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° ç 玉ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ デザインã€ã®ç¬¬ï¼‘ç« ã‚’Scalaã§å®Ÿè£…ã—ã¦ã¿ã¾ã—ãŸãŒã€‚味をã—ã‚ã¦ç¬¬ï¼’ç« ã‚‚ã‚„ã£ã¦ã¿ãŸã„ã¨æ€ã„ã¾ã™ã€‚ 関数プãƒã‚°ãƒ©ãƒŸãƒ³ã‚° ç 玉ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ デザイン 作者: Richard bird,山下伸夫出版社/メーカー: オーム社発売日: 2014/11/12メディア: å˜è¡Œæœ¬ï¼ˆã‚½ãƒ•ãƒˆã‚«ãƒãƒ¼ï¼‰ã“ã®å•†å“ã‚’å«ã‚€ãƒ–ãƒã‚° (1件) を見る ç¬¬ï¼’ç« ã®é¡Œæã¯ã€Œä¸Šä½è€…å•é¡Œã€ã§ã™ã€‚ ã“ã®å•é¡Œã€æ€ã£ãŸã‚“ã§ã™ã‘ã©ã€CodeIQã§çµåŸŽ 浩ã•ã‚“ãŒå‡ºé¡Œã—ãŸã€Œã‚¯ãƒãƒƒã‚·ãƒ³ã‚°å•é¡Œã€ã¨æœ¬è³ªçš„ã«åŒã˜ã§ã™ã。 挑戦者求むï¼ã€ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ 】交差点をã™ã°ã‚„ãæ•°ãˆã‚ˆã†ï¼ by The Essence of Programming çµåŸŽ 浩│CodeIQ ã“ã®å•é¡Œã€è‡ªåˆ†ã¯è§£ã‘ã¾ã›ã‚“ã§ã—ãŸ*1。(^^; 上ä½è€…å•é¡Œ 上ä½è€…å•é¡Œã¨ã¯ã€ã‚
「関数プãƒã‚°ãƒ©ãƒŸãƒ³ã‚° ç 玉ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ デザインã€ã‚’Scalaã§å®Ÿè£…ã—ã¦ã¿ã‚‹ - セカイノカタãƒ
Scala Advent Calendar 2014 - Qiita14日目ã®è¨˜äº‹ã§ã™ã€‚ 昨日ã®è¨˜äº‹ã¯ã€ @gakuzzzz ã•ã‚“ã® play2-auth 㧠OpenID ã¨ã‹ Twitter OAuth ã¨ã‹ OAuth2.0 ã¨ã‹ ã§ã—ãŸã€‚ ã•ã¦ã€ä»Šæ—¥ã®ãƒã‚¿ã§ã™ã€‚。。 関数プãƒã‚°ãƒ©ãƒŸãƒ³ã‚° ç 玉ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ デザイン 作者: Richard bird,山下伸夫出版社/メーカー: オーム社発売日: 2014/11/12メディア: å˜è¡Œæœ¬ï¼ˆã‚½ãƒ•ãƒˆã‚«ãƒãƒ¼ï¼‰ã“ã®å•†å“ã‚’å«ã‚€ãƒ–ãƒã‚° (1件) を見る ã“ã®æœ¬ã§ã™ãŒã€é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®ã‚¢ãƒ«ã‚´ãƒªã‚ºãƒ デザインを紹介ã—ãŸæœ¬ã§ã€ã¨ã¦ã‚‚難ã—ã„ã®ã§ã™ãŒã€é¢ç™½ã„ã§ã™ã€‚ Advent Calencdarã®ãƒã‚¿ã¨ã—ã¦ã€ã“ã‚Œã«å‡ºã¦ãるアルゴリズムをScalaã§å®Ÿè£…ã—ã¦ã¿ãŸã„ã¨æ€ã„ã¾ã™ã€‚ ãŠé¡Œã¯ã€ä¸€ç•ªç°¡å˜ãã†ãªã€Œç¬¬ï¼‘ç« æœ€å°è‡ªç”±æ•°ã€ã§ã™ã€‚ 「最å°è‡ªç”±æ•°ã€ã‚’求ã‚る一番シ
"部分é©ç”¨ (partial application)" 㨠"カリー化 (currying)" ã«ã¤ã„㦠| ITエンジニアã¨æ©Ÿæ¢°å¼æ™‚計
Haskell ãªã©ã® (純粋é…延) 関数型言語をå¦ç¿’ã™ã‚‹éš›ã®ç†è§£ã—ã«ãã„概念ã«ã€Œéƒ¨åˆ†é©ç”¨ã€ã¨ã€Œã‚«ãƒªãƒ¼åŒ–ã€ãŒã‚ã‚Šã¾ã™ã€‚実ã¯ä¸¡è€…ã¨ã‚‚éžå¸¸ã«å˜ç´”ã§ã€ç†è§£ã—ã¦ã—ã¾ãˆã°é›£ã—ãã¯ãªã„ã®ã§ã™ãŒã€æœ€åˆã«å¦ç¿’ã™ã‚‹æ™‚ã«ã¯ä»¥ä¸‹ã®ç–‘å•ãŒæ²¸ãç«‹ã¡ã¾ã™ã€‚ 「部分é©ç”¨ã€ã€Œã‚«ãƒªãƒ¼åŒ–ã€ã®ãƒ¡ãƒªãƒƒãƒˆã£ã¦ä½•ã ã‚ã†ï¼Ÿ 「部分é©ç”¨ã€ã€Œã‚«ãƒªãƒ¼åŒ–ã€ã®å˜åœ¨æ„義ãŒã‚ã‹ã‚‰ãªã„ 誤解をæã‚Œãšã«æ›¸ãã¨ã€ã€Œéƒ¨åˆ†é©ç”¨ã€ã‚„「カリー化ã€ã£ã¦ç„¡ãã¦ã‚‚困らãªã„ã‚“ã§ã™ã‚ˆã。 ãŸã ã€ã€Œéƒ¨åˆ†é©ç”¨ã€ã‚„「カリー化ã€ãŒã‚ã‚‹ã¨ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ãŒéžå¸¸ã«æ¥½ã—ããªã‚Šã¾ã™ã€‚ã¾ãŸã€å®Ÿç”¨æ€§ã®è¦³ç‚¹ã‹ã‚‰è¦‹ã¦ã‚‚ã“ã‚Œã¯éžå¸¸ã«å½¹ç«‹ã¡ã¾ã™ã—ã€ã€Œéƒ¨åˆ†é©ç”¨ã€ã¨ã€Œã‚«ãƒªãƒ¼åŒ–ã€ãŒç†è§£ã§ãã¦ã“ãã€åˆã‚ã¦é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒžã®ã‚¹ã‚¿ãƒ¼ãƒˆãƒ©ã‚¤ãƒ³ã«ç«‹ã£ãŸã¨è¨€ã£ã¦ã‚‚éŽè¨€ã§ã¯ã‚ã‚Šã¾ã›ã‚“。 特㫠Haskell ã§ã¯ã€ãƒ‘ズルã®ã‚ˆã†ãªæ„Ÿè¦šã§ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã™ã‚‹ã“ã¨ãŒæ¯”較的多ãã‚ã‚Šã¾ã™ãŒã€ã“ã‚Œã¯ã€Œéƒ¨åˆ†é©ç”¨ã€ã«ã‚ˆã£ã¦å¾—られã¦ã„ã‚‹ã¨æ€
Haskell æ§‹æ–‡è§£æž è¶…å…¥é–€ - Qiita
Haskellã§ã¯ãƒ¢ãƒŠãƒ‰ã¨å‘¼ã°ã‚Œã‚‹éƒ¨å“を組ã¿åˆã‚ã›ã¦æ§‹æ–‡è§£æžã‚’è¡Œã„ã¾ã™ã€‚ã“ã®æ–¹å¼ã‚’パーサコンビãƒãƒ¼ã‚¿ã¨å‘¼ã³ã¾ã™ã€‚動作原ç†ã‚’ç°¡å˜ã«èª¬æ˜Žã—ãªãŒã‚‰ä½¿ã„æ–¹ã®åˆæ©ã‚’説明ã—ã¾ã™ã€‚Parsecã¨ã„ã†ãƒ©ã‚¤ãƒ–ラリã§ç°¡å˜ãªå››å‰‡æ¼”算器を作æˆã—ã¾ã™ã€‚ シリーズã®è¨˜äº‹ã§ã™ã€‚ Haskell 超入門 Haskell 代数的データ型 超入門 Haskell アクション 超入門 Haskell ラムダ 超入門 Haskell アクションã¨ãƒ©ãƒ ダ 超入門 Haskell IOモナド 超入門 Haskell リストモナド 超入門 Haskell Maybeモナド 超入門 Haskell 状態系モナド 超入門 Haskell モナド変æ›å 超入門 Haskell ä¾‹å¤–å‡¦ç† è¶…å…¥é–€ Haskell æ§‹æ–‡è§£æž è¶…å…¥é–€ ↠ã“ã®è¨˜äº‹ ã€äºˆå®šã€‘Haskell 継続モナド 超入門 ã€äºˆå®šã€‘Haskell 型クラス 超入門 ã€äºˆå®šã€‘Has
Model-view-controller, Haskell-style
I'm releasing the mvc library for model-view-controller (MVC) programming in Haskell. I initially designed this library with games and user interfaces in mind, but the larger goal of this library is to provide a mathematically inspired framework for general-purpose component sharing in Haskell. This library differs in a significant way from other MVC libraries: this API statically enforces in the
Haskell ã§ã®ãƒ‡ãƒãƒƒã‚° - ã‚ã©ã‘ãªã„話
「純粋関数型言語ã¯ãƒ‡ãƒãƒƒã‚°ã—ã«ãã„。ã ã£ã¦ç´”粋ãªé–¢æ•°ã§ printf デãƒãƒƒã‚°ã§ããªã„ã‹ã‚‰ã€ã¨ã¤ã¶ã‚„ã„ã¦ã„る人をよã見ã‹ã‘ã¾ã™ã€‚ã“ã‚Œã¾ã§æ”¾ç½®ã—ã¦ãã¾ã—ãŸãŒã€ãƒªãƒ„イートãŒ50を超ãˆãŸã®ã§ã€Haskellã§ã®ãƒ‡ãƒãƒƒã‚°ã«ã¤ã„ã¦æ›¸ãã¾ã™ã€‚ 例外処ç†ã¨åŒã˜ã‚ˆã†ã«ã€Haskell ã§ã®ãƒ‡ãƒãƒƒã‚°ã§ã¯ã€ç´”粋ãªé–¢æ•°ã¨ IO を分ã‘ã¦è€ƒãˆã‚‹å¿…è¦ã‚ã‚Šã¾ã™ã€‚ IO ã§ã® printf デãƒãƒƒã‚° IO ã§ã¯ã€putStrLn ã‚„ print ãŒä½¿ãˆã‚‹ã‹ã‚‰å•é¡Œãªã„ã§ã™ã‚ˆã？ foo :: Int -> IO Bool foo i = do x <- ã‚ã‚Œã—㦠i putStrLn $ "x = " ++ show x ã“ã‚Œã—㦠putStrLn "ã“ã“も通éŽ" -- ãれもã™ã‚‹ y <- ãれもã™ã‚‹ print y return y ã¡ãªã¿ã«ã€forkIO èµ·å‹•ã—ãŸè»½é‡ã‚¹ãƒ¬ãƒƒãƒ‰ã‹ã‚‰ putStrLn ã™ã‚‹å ´åˆã€è»½é‡ã‚¹
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
foldlを直㙠- 純粋関数空間
http://www.well-typed.com/blog/90/ foldlã«é–¢ã™ã‚‹ã“ã®è¨˜äº‹ï¼ˆè‹±æ–‡ï¼‰ãŒé¢ç™½ã‹ã£ãŸã®ã§ã€å‹æ‰‹ç¿»è¨³ã—ã¾ã—ãŸã€‚ foldlãªã‚“ã¨ã‹ãªã‚‹ã¨ã„ã„ã§ã™ã。 foldlã‚’ç›´ã™ foldl 関数ã¯å£Šã‚Œã¦ã„る。壊れã¦ã„ã‚‹ã¨ã¿ã‚“ãªãŒçŸ¥ã£ã¦ã„る。 å››åŠä¸–紀近ã壊れãŸã¾ã¾ã 。ã¤ã„ã«ã“れを修æ£ã™ã‚‹æ™‚ãŒæ¥ãŸï¼ 今日ã€ç§ã¯Prelude.foldlã‚’Data.List.foldl'ã¨ã—ã¦çŸ¥ã‚‰ã‚Œã‚‹å®Ÿè£…ã§å†å®šç¾©ã™ã‚‹ã“ã¨ã‚’æ案ã™ã‚‹ã€‚ foldlã¯å£Šã‚Œã¦ã„ã‚‹ï¼ æ—¢ã«ã”å˜çŸ¥ã ã¨ã¯æ€ã†ãŒã€å¿µã®ãŸã‚… HaskellerãŒå¿…ãšfoldlã§ã¯ãªãã€foldrã‚„foldl'を使ã†ã‚ˆã†ã«å‹§ã‚ã¦ãã‚‹ã“ã¨ã«ãŠæ°—ã¥ãã ã‚ã†ã‹ï¼Ÿ 例ãˆã°Real World Haskellã§ã¯æ¬¡ã®ã‚ˆã†ã«è¨€ã£ã¦ã„る。 `foldl`ã®ã‚µãƒ³ã‚¯ã®æŒ™å‹•ã®ãŸã‚ã€å®Ÿã‚¢ãƒ—リã§ã¯ã“ã®é–¢æ•°ã‚’使ã‚ãªã„よã†ã«ã™ã‚‹ã®ãŒæœ›ã¾ã—ã„。 特ã«å•é¡ŒãŒãªã„å ´åˆã§ã‚‚
プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžæŽ¢è¨ª
Walking Through Programming Languages Languages Standard ML Haskell Misc. About
Typeclassopedia - HaskellWiki
By Brent Yorgey, byorgey@gmail.com Originally published 12 March 2009 in issue 13 of the Monad.Reader. Ported to the Haskell wiki in November 2011 by Geheimdienst. This is now the official version of the Typeclassopedia and supersedes the version published in the Monad.Reader. Please help update and extend it by editing it yourself or by leaving comments, suggestions, and questions on the talk pag
Haskellã¯çœŸé¢ç›®ãªã‚¢ãƒ—リケーション開発ã«å‘ã„ã¦ã„ã‚‹ - syocy’s diary
qiita.com ↑ã®è¨˜äº‹ã§ï¼ˆä¸»é¡Œã§ã¯ãªã„ã¨æ€ã†ã‚‚ã®ã®ï¼‰Haskellã®æ‰¹åˆ¤ã«çµæ§‹ãªåˆ†é‡ãŒå‰²ã‹ã‚Œã¦ã„ã¦ã€ãã®æ‰¹åˆ¤ã®ãªã‹ã«ã€Œã¡ã‚‡ã£ã¨é•ã†ã‚“ã˜ã‚ƒãªã„ã‹ãªã€ã¨ã„ã†ç‚¹ãŒã„ãã¤ã‹ã‚ã£ãŸã®ã§åè«–ã½ã„ã“ã¨ã‚’書ãã¾ã™ã€‚ "Haskell ã¯çœŸé¢ç›®ãªã‚¢ãƒ—リケーション開発ã«ã¯å‘ã„ã¦ãªã„"ã«ã¤ã„㦠ã“ã‚Œã«ã¯å¤šåˆ†ã„ãã¤ã‹äº‹ä¾‹ã‚’挙ã’ã‚Œã°ã‚ˆãã¦ã€ Facebook ã§ã¯ã‚¹ãƒ‘ムç‰ã®æ”»æ’ƒã¨æˆ¦ã†ãŸã‚ã®ã‚·ã‚¹ãƒ†ãƒ ã‚’ Haskell ã§ä½œã£ã¦ã„ã¾ã™ã€‚ Fighting spam with Haskell | Engineering Blog | Facebook Code | Facebook (ã“ã®è¨˜äº‹ã‚’書ã„ã¦ã„ã‚‹ Simon Marlow æ°ã¯ Haskell ãŠã‚ˆã³ GHC ã®ä¸»è¦é–‹ç™ºè€…) より「アプリケーションã€ãªäº‹ä¾‹ãŒå¿…è¦ãªã‚‰ã€ãƒ—レゼンツール㮠Prezi を挙ã’ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ Case Study - Hask
1
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
Haskell Type vs Data Constructor
モナドã«ã¤ã„ã¦å¦ã‚“ã§ã„ã‚‹ã®ã§ã™ãŒã€mapã‚„flatMapã¯åœè«–ã§ã¯ã©ã®æ¦‚念ã«ã‚ãŸã‚‹ã®ã§ã™ã‹ï¼Ÿ
Haskellã§ãƒ•ã‚£ãƒœãƒŠãƒƒãƒæ•°åˆ— 〜Haskellã§éžå®Ÿç”¨çš„ãªã‚³ãƒ¼ãƒ‰ã‚’書ã„ã¦æ‚¦ã«å…¥ã‚‹ã®ã¯ã‚„ã‚ã‚〜 - Qiita
https://repl.it/repls/RedIllfatedForms
[PDF] Haskell 2010 Language Report
{{#tags}}- {{label}}
{{/tags}}