Haskellã®lensã®ä½¿ã„æ–¹ (基本) - ã¿ã‚†ã£ãã®ã«ã£ã
ekmett先生ã®lensã«é–¢ã—㦠Lens'ã¯ä¾¿åˆ©ã«ä½¿ãˆã¯ã™ã‚‹ã‘ã©ã€Prism,Iso,Traversal,Foldã¿ãŸã„ãªã®ã¯è§¦ã£ãŸã“ã¨ãŒãªã‹ã£ãŸã®ã§èª¿ã¹ãŸã€‚ Lensã®åˆ©ç”¨ 1 import Control.Lens ã—㦠1 2 3 4 5 6 >>> ("hello",("world","!!!")) ^. _2 . _1 "world" >>> ("hello",("world","!!!")) & _2 . _1 .~ 42 ("hello",(42,"!!!")) >>> ("hello",("world","!!!")) & _2 . _1 %~ map toUpper ("hello",("WORLD","!!!")) ã¿ãŸã„ã«ä½¿ã†ã€‚å„ªå…ˆé †ä½ã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã£ã¦ã„ã‚‹: 1 2 3 >>> ("hello",("world","!!!")) ^. (_2 . _1) >>
A Little Lens Starter Tutorial - School of Haskell | School of Haskell
Interactive code snippets not yet available for SoH 2.0, see our Status of of School of Haskell 2.0 blog post What is lens?lens is a package which provides the type synonym Lens which is one of a few implementations of the concept of lenses, or functional references. lens also provides a number of generalizations of lenses including Prisms, Traversals, Isos, and Folds. Why do I care?Lenses and the
Lensã£ã¦ãªã‚“ãžã‚„ã¨æ€ã£ã¦ãŸã®ãŒã€ã“ã“見ã¦ä¸€ç™ºã§ã‚ã‹ã‚Šã¾ã—㟠- 趣味プãƒã‚°ãƒ©ãƒžãŒã¾ã‚Œã«ãªã‚“ã‹ã—ãŸã“ã¨ã®è¨˜éŒ²
argonautを使ã†ã‚ˆã†ã«ã—ãŸã‚‰ã€Monocleã¨ã„ã†è¬Žã®ãƒ©ã‚¤ãƒ–ラリãŒè¿½åŠ ã•ã‚Œã¦ã„ãŸã€‚Haskellã®Lensã¨ã„ã†ã®ã‚’Scalaã«ç§»æ¤ã—ãŸã‚‚ã®ã‚‰ã—ã„。 Lensã£ã¦æœ€è¿‘良ã見る。ã§ã‚‚ãªã‚“ã ã‹ã‚ˆãã‚ã‹ã‚‰ã‚“ãªã‚ã€ã¨æ€ã£ã¦ã¾ã—ãŸã€‚ãŒã€ä¸‹ã®ãƒªãƒ³ã‚¯å…ˆã‚’見ã¦ä¸€ç™ºã§åˆ†ã‹ã‚Šã¾ã—ãŸã€‚ Monocleã¨ã‹ã„ã†ã®ãŒã‚ã‚Šã¾ã—㦠- 独å¦å¤§å¦æƒ…å ±å¦éƒ¨ 書ã„ã¦ãã ã•ã£ãŸæ–¹ã«æ„Ÿè¬ã§ã™ã€‚
Haskellã®lensã®ä½¿ã„æ–¹ (基本) - ã¿ã‚†ã£ãã®ã«ã£ã
>>> ("hello",("world","!!!")) ^. _2 . _1 "world" >>> ("hello",("world","!!!")) & _2 . _1 .~ 42 ("hello",(42,"!!!")) >>> ("hello",("world","!!!")) & _2 . _1 %~ map toUpper ("hello",("WORLD","!!!"))
A wreq tutorial
Learn how to write web clients. We start easy, then ramp up the power. Installation To use the wreq package, simply use cabal, the standard Haskell package management command. cabal update cabal install -j --disable-tests wreq Depending on how many prerequisites you already have installed, and what your Cabal configuration looks like, the build may take a few minutes: a few seconds for wreq, and t
Lensメモ - DebugIto's diary
ã“ã“最近ã€å°‘ã—æ€ã†ã¨ã“ã‚ã‚ã£ã¦Haskellã®Lensã«ã¤ã„ã¦å‹‰å¼·ã—ã¦ã„ãŸã€‚ Lensã«é–¢ã™ã‚‹ãƒ‰ã‚ュメントをã„ã‚ã„ã‚探ã—ãŸãŒã€ã“ã®ãƒ‰ã‚ュメントãŒéžå¸¸ã«åˆ†ã‹ã‚Šã‚„ã™ã‹ã£ãŸã€‚ Zippers and lenses: http://www.scs.stanford.edu/14sp-cs240h/slides/lenses-slides.html#%281%29 "Real World Haskell"ã®å…±è‘—者ã§ã‚ã‚‹Bryan O'Sullivanã«ã‚ˆã‚‹Stanford大ã®è¬›ç¾©ã‚¹ãƒ©ã‚¤ãƒ‰ã‚‰ã—ã„。Zipperã‹ã‚‰è©±ã‚’始ã‚ã¦Lensã®èª¬æ˜Žã‚’ã—ã¦ã„る。Zipperã«ã¤ã„ã¦ã¯ã™ã”ã„H本ã«ã‚‚解説ãŒã‚ã‚‹ã®ã§ã€Zipperã‚’ã‚る程度ç†è§£ã—ã¦ã„ã‚Œã°æ¯”較的カンタンã«ç†è§£ã§ãる内容ã ã‚ã†ã€‚ ãŸã ã€è¬›ç¾©ã‚¹ãƒ©ã‚¤ãƒ‰ã®(41)〜(47)ã‚ãŸã‚Šã¯ã“ã‚Œã ã‘ã§ã¯å°‘々ã‚ã‹ã‚Šã«ãã„ã¨æ€ã£ãŸã€‚ã“ã“ã¯Zipperã‹ã‚‰Lensã«è©±ãŒç§»è¡Œã™ã‚‹ã¨
Lensã§è¡Œã“ã†ï¼ - Just $ A sandbox
続編：Lensã§è¡Œã“ã†ï¼(2):Isoã¸ã®æ‹¡å¼µ - ã¿ã‚‡ã‚“ã•ã‚“ã®ã€‚ Lensã¨ã¯ Lens(http://hackage.haskell.org/package/lens-3.7.1.2)ã¨ã„ã†ãƒ‘ッケージãŒã‚ã‚Šã¾ã™ã€‚ éžå¸¸ã«å¤§ããªãƒ‘ッケージã§ã€ä¸ã«ã¯éžå¸¸ã«ä¾¿åˆ©ãªå‡½æ•°ç¾¤ãŒãŸãã•ã‚“æƒã£ã¦ã„ã¾ã™ã€‚ ç§ãŒèª¿ã¹ãŸé™ã‚Šã§ã¯ã€ "Lens package in Haskell(Haskellã®Lensパッケージ)" ã®è§£èª¬è¨˜äº‹ã¯Data.Lens(http://hackage.haskell.org/package/lenses-0.1.6)ãŒã‚„ãŸã‚‰ã¨ãƒ’ットã™ã‚‹ã®ã§ã™ãŒã€ã“ã¡ã‚‰ã‚ˆã‚Šã‚‚Control.Lensã¨ãã®å‘¨ã‚Šã®ãƒ‘ッケージ群(ã“ã®æ®µè½ã®æœ€åˆã«ãƒªãƒ³ã‚¯ãŒè²¼ã£ã¦ã‚ã‚‹æ–¹ã§ã™)ã®æ–¹ãŒè‰²ã€…ã¨ä¾¿åˆ©ã§ãŸãã•ã‚“ã®å‡½æ•°ãŒæƒã£ã¦ã„ã‚‹ã®ã§ã€ãœã²Conrol.Lensã®æ–¹ã‚’使ã£ã¦ãã ã•ã„*1。 ã•ã¦ã€Lensã£ã¦ä½•ãŒå‡ºæ¥ã‚‹
Lens Tutorial - Introduction (part 1) - Jakub Arnold Blog
Programovánà jako zábavná hra! DÄ›ti, ale i dospÄ›là se mohou nauÄit kódovat velice pÅ™Ãstupnou formou, která bude vÅ¡echny bavit! Foto: Pixabay Základy programovánà Programovánà se může zdát jako složitá vÄ›da, ale s dneÅ¡nÃmi dostupnými nástroji se tomuto Å™emeslu může nauÄit každý. SamozÅ™ejmÄ› záležÃ, jaké k tomu má kdo dispozice a kolik Äasu je ochoten uÄenà vÄ›novat. Už ale dávno neplatÃ, že je progra
Episode 1 - Edward Kmett on Lenses - The Haskell Cast
Edward Kmett joins us to talk about lenses, comonads, and the future of the Haskell core libraries. He also shares with us how he discovered Haskell, his academic background, and advice for new Haskell developers being exposed to the math concepts inside of his libraries for the first time. Links from the show: http://lens.github.io/ http://www.youtube.com/user/edwardkmett http://comonad.com/ You
Lensã“ã¨ã¯ã˜ã‚ - ã‚ã©ã‘ãªã„話
見ã‚ï¼ Haskell ㌠OOPL ã®ã‚ˆã†ã ï¼ ã•ã¦ã•ã¦ã€ã‚ˆã†ã‚„ãé‡ã„腰を上ã’ã¦ã€Lens を勉強ã—始ã‚ã¾ã—ãŸã‚ˆã€‚Haksell for allを見ã¦å‹‰å¼·ã™ã‚Œã°ã„ã„ã®ã‹ãªã¨æ€ã£ãŸã‚“ã§ã™ãŒã€è§£èª¬ã—ã¦ã„るパッケージ㌠data-lens ãªã®ã§å¤ã„ã§ã™ã。 今ã€ä½¿ã†ã¹ããªã®ã¯ã€lens ã¨ã„ã†ãƒ‘ッケージらã—ã„ã§ã™ã€‚解説ã¯ã€ã“ã® README ã‚’èªã‚€ã®ãŒä¸€ç•ªã ãã†ã§ã™ã€‚ã“ã® README 㨠Haskell for all ã‚’ã«ã‚‰ã‚ã£ã“ã—ãªãŒã‚‰ã€Lens ã® getter 㨠setter ã®æ©Ÿèƒ½ã‚’使ã£ã¦ã¿ã¾ã™ã€‚ 背景 Haskell ã®ä»£æ•°ãƒ‡ãƒ¼ã‚¿åž‹ã«ã¯ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ãƒ©ãƒ™ãƒ«ãŒå®šç¾©ã§ãã¦ã€ã“ã‚ŒãŒã„ã‚ゆる getter 㨠setter ã®å½¹å‰²ã‚’æžœãŸã—ã¾ã™ã€‚Haskell for all ã‹ã‚‰ä¾‹ã‚’引用ã—ã¦ã¿ã¾ã—ょã†ã€‚ data Point = Point { x :: Double , y :: Do
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microlens
van Laarhoven lens - Google 検索
Twan van Laarhoven's blog
Haskellã®lensã®ä½¿ã„æ–¹ (ã‚„ã°ã‚) - ã†ã•ãŽå°å±‹
Lens&Prism勉強会 - 資料一覧 - connpass
glguy’s gists
What are the differences between lenses and zippers?
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