Composable Error Handling in OCaml
Let’s discuss common ways to handle errors in OCaml, their shortcomings, and finally, how polymorphic variants may help. The discussion applies equally well to Reason ML. If you need an introduction to the topic, I recommend Real World OCaml chapter on Error Handling. As a reference point, we’ll take three hypothetical functions which can return errors and which we want to compose: Parser.parse, w
OCaml Platform 2017
An OCaml Workshop talk at ICFP 2017, updating on the state of the OCaml platform tooling.
Notions of Computations and Effects - Just $ A sandbox
å‰å›žã®effect systemã«å¯¾ã™ã‚‹ãƒœãƒ¤ã‚ã€ã‚ã‚‹ã„ã¯äºˆè¨€ãŒè‰²ã‚“ãªäººã«èªã¾ã‚ŒãŸã¿ãŸã„ãªã®ã§èˆˆå‘³ãŒã‚る人ãŒä¸€å®šæ•°ã„ã‚‹ãªã‚‰effect systemã®ç´¹ä»‹è¨˜äº‹ã‚’ã¡ã‚ƒã‚“ã¨æ›¸ã“ã†ã¨æ€ã£ãŸæ¬¡ç¬¬ã€‚ ã¨ã„ã†ã‚ã‘ã§monadã‚’å‰æã¨ã—ã¦ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžçš„ãªè¦‹æ–¹ã¨åœè«–çš„ãªè¦‹æ–¹ã‚’通ã—ã¦effectã«é–¢ã™ã‚‹ãŠè©±ã‚’ã—ã¦ã¿ã¾ã™ã€‚ æ³¨æ„ ä»¥ä¸‹ã®ãƒ—ãƒã‚°ãƒ©ãƒ ã¯Haskellã«å¯„ã›ãŸã‚ªãƒ¬ã‚ªãƒ¬syntaxã§å®Ÿéš›ã«ãã†ã„ã†å®Ÿè£…ãŒã‚ã‚‹ã‚ã‘ã˜ã‚ƒãªã„ã®ã§æ³¨æ„ã—ã¦ãã ã•ã„。実際ã®å®Ÿè£…ã•ã‚Œã¦ã„る言語ã®è©±ã¯æœ€å¾Œã«å°‘ã—ã—ã¾ã™ã€‚ programming with effects effectã¯é€šå¸¸type-and-effect-systemã¨å‘¼ã°ã‚Œã‚‹ã‚ˆã†ã«ã‚ã‚‹æ„味ã§ä¸€ç¨®ã®åž‹ã‚·ã‚¹ãƒ†ãƒ ã®ã‚ˆã†ãªã‚‚ã®ã§ã™ã€‚型システムãŒãƒ—ãƒã‚°ãƒ©ãƒ ã®å…¥åŠ›ã¨å‡ºåŠ›ã®å€¤ã‚’見ç©ã‚‚る仕組ã¿ã ã£ãŸã®ã«å¯¾ã—ã€ã‚¨ãƒ•ã‚§ã‚¯ãƒˆã‚·ã‚¹ãƒ†ãƒ ã¯ãƒ—ãƒã‚°ãƒ©ãƒ を実行ã—ãŸéš›ã«ã€Œèµ·ãã†ã‚‹ã€ã‚¨ãƒ•ã‚§ã‚¯ãƒˆã‚’コン
OCamlã®format (型安全ãªprintf/scanf) ã®ä»•çµ„ã¿ - ç°¡æ½”ãªQ
OCamlã®Pervasives (デフォルトã§openã•ã‚Œã‚‹ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«) ã«ã¯ã€Printf/Format/Scanfã§ä½¿ã†ãŸã‚ã® format ã¨ã„ã†åž‹ãŒã‚る。 OCamlã®ç‰¹æ®Šæ©Ÿèƒ½ã¨ã—ã¦ã€åž‹æŽ¨è«–時ã«æ–‡å—列リテラルã«stringã§ã¯ãªãformatã¨ã„ã†åž‹ãŒã¤ãã“ã¨ãŒã‚る。 $ ocaml OCaml version 4.04.0+dev2-2016-04-27 # "%d";; - : string = "%d" # ("%d" : _ format);; - : (int -> 'a, 'b, 'a) format = CamlinternalFormatBasics.Format (CamlinternalFormatBasics.Int (CamlinternalFormatBasics.Int_d, CamlinternalFormatBasics.No_padding, C
OCaml ã® let 㨠let rec ã¯ãªãœåˆ¥æ‰±ã„ã«ãªã£ã¦ã„ã‚‹ã®ã‹ã€æ±ºå®šç‰ˆã€ã‚‚ã—ã㯠OCaml 暦å何年ã ã£ãŸã‹å¿˜ã‚ŒãŸã‘ã©ä»•äº‹ã§ Haskell を一年使ã£ã¦ã¿ãŸ - camlspotter’s blog
ã¯ã˜ã‚ã«æ–ã£ã¦ãŠããŒã€å…¨éƒ¨Pros/Consã®ã‚るデザインãƒãƒ§ã‚¤ã‚¹ãªã®ã§ã€ã“ã†ã˜ã‚ƒãªãゃã„ã‘ãªã„ã£ã¦ã“ã¨ã§ã¯ãªã„。ãŸã 〠OCaml ã¯ã“ã®é¸æŠžã‚’ã—ãŸã€ãã„ã†äº‹ã 。 å‰å›žã®ã€ŒçµŒé¨“15å¹´ã® OCaml ユーザー㌠Haskell を仕事ã§åŠå¹´ä½¿ã£ã¦ã¿ãŸã€ http://d.hatena.ne.jp/camlspotter/20101212/1292165692 ã®ã‚ˆã†ãªæ˜“ã—ã„æ–‡ç« ã§ã¯ãªã„ã®ã§ã‚ã‹ã‚‰ãªã„人ã¯ã¨ã“ã¨ã‚“判らãªã„ã ã‚ã†ã€‚ã¾ã‚勘å¼ã—ã¦æ¬²ã—ã„。 ã‚ã¨ã€é¢å€’ã ã‚ã†ãŒã€èªã‚€äººã¯å…¨éƒ¨å¸¸ä½“を敬体ã«ã—ã¦æœ€å¾Œã«ã€Œã¨æ€ã„ã¾ã™ã€ã‚’ã¤ã‘ã¦èªã‚“ã§ãれ。ãã ã•ã„ã€ã¨æ€ã„ã¾ã™ã€‚ Shadowing ã¯ä¾¿åˆ©ã§ã‚ã‚‹ã¨æ€ã£ã¦ã„ã‚‹ OCaml ã® let ã¯éžå†å¸°ãªã®ã§ä»¥å‰å®šç¾©ã•ã‚ŒãŸåå‰ã«åˆ¥ã®å€¤ã®æŸç¸›ã‚’オーãƒãƒ¼ãƒ©ã‚¤ãƒ‰ã§ãる。OCaml ã®äººã¯ã“ã‚ŒãŒä¾¿åˆ©ã ã¨æ€ã£ã¦ãŠã‚Šçš†æ™®é€šã«ä½¿ã£ã¦ã„る。詳ã—ã㯠http://d.hat
OCaml (deprecated) - Visual Studio Marketplace
Launch VS Code Quick Open (Ctrl+P), paste the following command, and press enter. If you are seeking for an OCaml debugger vscode extension. Take a look at ocamlearlybird. Deprecated. Please use this official extension instead. Features Basic syntax highlighting for *.ml, *.mli, *.mly and *.mll. ported from textmate Auto-completion (aka. IntelliSense). powered by ocamlmerlin Error check on the fly
Unix system programming in OCaml
Unix system programming in OCamlXavier Leroy and Didier Rémy1stDecember , 2014 © 1991, 1992, 2003, 2004, 2005, 2006, 2008, 2009, 2010 Xavier Leroy and Didier Rémy, inria Rocquencourt. Rights reserved. Consult the license. Translation by Daniel C. Bünzli, Eric Cooper, Eliot Handelman, Priya Hattiangdi, Thad Meyer, Prashanth Mundkur, Richard Paradies, Till Varoquaux, Mark Wong-VanHaren Proofread by
1ML - core and modules united
Description 1ML is a reboot of ML starting from first-class modules, and unifies core and module layer into one small and consistent language. It is described in the following papers: Andreas Rossberg. 1ML — core and modules united. ICFP 2015. Andreas Rossberg. 1ML — core and modules united (Extended). 2015. Expanded version including Technical Appendix. Andreas Rossberg. 1ML — core and modules un
Documentation | reason
Documentation This directory is not the Reason User documentation. This directory is for Reason contributor documentation. The Reason user docs live online at https://reasonml.github.io. The repo for those Reason docs lives at github.com/reasonml/reasonml.github.io Inside of this directory: Getting Started Contributing: GETTING_STARTED_CONTRIBUTING.md. Releasing: RELEASING.md Programmatically Usin
SMLã§Dynamic(å†ã³) - ::Eldesh a b = LEFT a | RIGHT b
ã“ã®è¨˜äº‹ã¯ ML Advent Calendar 2014 7日目ã®è¨˜äº‹ã§ã™ã€‚ ã“ã“ã§ã¯SMLã«ã‚ˆã‚‹Dynamic(ã‚ã‚‹ã„ã¯Any)ã¨å‘¼ã°ã‚Œã‚‹*1ã€ä»»æ„ã®åž‹ã®å€¤ã‚’ä¿æŒå‡ºæ¥ã‚‹ãƒ†ã‚¯ãƒ‹ãƒƒã‚¯ã‚’紹介ã—ã¾ã™ã€‚ ä»»æ„ã®åž‹ã®å€¤ã‚’ä¿æŒå¯èƒ½ãªåž‹ã¨ã„ã†å†…容㯠以å‰ã‚‚紹介ã—ãŸã“ã¨ãŒã‚ã‚Šã¾ã™(2) ãŒã€å‰å›žç´¹ä»‹ã—ãŸå®Ÿè£…ã§ã¯ä¾‹å¤–を使ã£ã¦ãŠã‚Šã€ãƒ—ãƒã‚°ãƒ©ãƒ ã®ä½œæ³•ã¾ãŸã¯ãƒ‘フォーマンスã«æ‡¸å¿µãŒã‚ã‚‹ã‹ã‚‚知れã¾ã›ã‚“。プãƒã‚°ãƒ©ãƒžã®å¿ƒç†çš„ã«ã‚‚よã‚ã—ããªã•ãã†ã§ã™ã€‚ ã“ã®è¨˜äº‹ã§ã¯ä¾‹å¤–を使ã‚ãšãƒãƒ¼ã‚¿ãƒ–ルãªã‚³ãƒ¼ãƒ‰ã®ã¿ã§åŒç‰ã®æŒ¯ã‚‹èˆžã„を実ç¾ã™ã‚‹ãƒ†ã‚¯ãƒ‹ãƒƒã‚¯ã‚’紹介ã—ã€å®Ÿè£…ã‚’ç†è§£å‡ºæ¥ã‚‹ã‚ˆã†ã«è§£èª¬ã—ã¾ã™ã€‚ åº/Dynamicã®å¿…è¦æ€§ StandardMLã§ã‚¸ã‚§ãƒãƒªãƒƒã‚¯ãªã‚³ãƒ¼ãƒ‰ã‚’書ã“ã†ã¨ã™ã‚‹ã¨ã€åž‹ã«å¿œã˜ã¦å‡¦ç†ã‚’切り替ãˆã‚‹ã¨ã„ã†ã“ã¨ãŒä¸€åˆ‡å‡ºæ¥ãªã„ã“ã¨ãŒãƒãƒƒã‚¯ã«ãªã‚Šã¾ã™ã€‚(ãã®ä»£ã‚ã‚Šåž‹ãŒå®Œå…¨ã«æŽ¨è«–ã•ã‚Œã‚‹) ã—ã‹ã—ã©ã†ã—ã¦ã‚‚åž‹ã«ã‚ˆã£ã¦æŒ¯ã‚‹èˆžã„を変ãˆãŸã„å ´åˆ
Computer Laboratory – Course pages 2014–15: Advanced Functional Programming – Course materials
Mailing list There is a mailing list for the course: [email protected]. Announcements, questions and discussion. Feel free to post! Have a question but feeling shy? Mail a lecturer instead and we'll anonymise and post your question: jerem[email protected] or leo.whit[email protected]. Preparation If you haven't used a typed functional language before then it would be wise to familiarize y
Travis CIã§OCamlを使ã†ã¾ã§ã®é“ã®ã‚Š - Handwriting
Travis CIã¯Githubã®hookã¨é€£æºã—ã¦ã€push時ã«è‡ªå‹•çš„ã«ãƒ†ã‚¹ãƒˆã‚’通ã™ã€æ‰€è¬‚CIã€ç¶™ç¶šçš„インテグレーションツールã¨ã„ã†ã‚„ã¤ã 。 本記事ã§ã¯Travis CI自体ã®è©³ç´°ãªä½¿ã„æ–¹ã«è§¦ã‚Œã‚‹ã“ã¨ã¯ã—ãªã„。公å¼ãƒ‰ã‚ュメントをãŸã©ã‚Œã°çµæ§‹è¦ªåˆ‡ã«èª¬æ˜Žã•ã‚Œã¦ã„る。 Travis CIã§ä½¿ãˆã‚‹è¨€èªžã¯ä»¥ä¸‹ã®ãƒªãƒ³ã‚¯ã§è¦‹ã‚‹ã“ã¨ãŒå‡ºæ¥ã‚‹ã€‚ Languages - Travis CI ã“ã“ã§ã²ã¨ã¤å•é¡ŒãŒã‚る。 OCamlã®ã‚µãƒãƒ¼ãƒˆãŒãªã„。 ã“ã‚Œã¯ç”±ã€…ã—ã事態ã 。人類ã®è‹±çŸ¥ã¨å¸Œæœ›ã§ã‚ã‚‹OCamlãŒä½¿ãˆãªã„。全人å£ã®åŠæ•°ãらã„ãŒè‡ªåˆ†ã®æ›¸ããŸã„プãƒã‚°ãƒ©ãƒ を赤裸々ã«è¡¨ç¾ã§ããªã„ã“ã¨ã«è‹¦ã—ã¿ã‚’覚ãˆã‚‹ã“ã¨ã ã‚ã†ã€‚ ã¨ã„ã†ã“ã¨ã§ã€æœ¬è¨˜äº‹ã§ã¯Travis CIã§OCamlを使ã†ã«ã¯ã©ã†ã™ã‚Œã°ã‚ˆã„ã‹ã‚’示ã™ã€‚ OCamlå…¬å¼ã®Travis CI bindingを入手ã™ã‚‹ ã¨æ€ã£ãŸãŒã€å®Ÿã¯å…¬å¼ã‹ã‚‰bindingãŒæä¾›ã•ã‚Œã¦
Introducing Incremental
I’m pleased to announce the release of Incremental (well commented mli here), a powerful library for building self-adjusting computations, i.e., computations that can be updated efficiently when their inputs change. At its simplest, you can think of a self-adjusting computation as a fancy spreadsheet. In a spreadsheet, each cell contains either simple data, or an equation that describes how the va
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ã‚ャミãƒæ§˜ãŒ id:ymotongpoo を木人形ã«ã•ã‚Œã‚‹ã‚ˆã†ã§ã™ - camlspotter’s blog
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ocaml-zippy-tutorial-in-japanese/leopard_syntax.md at master · camlspotter/ocaml-zippy-tutorial-in-japanese
Pusher | Leader In Realtime Technologies
https://strymonas.github.io/
Bitbucket
Exercise Platform for the OCaml MOOC
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