FastParse 2.2.2
FastParse 2.2.2 Fast to write, Fast running Parsers in Scala import fastparse._, NoWhitespace._ def number[_: P]: P[Int] = P( CharIn("0-9").rep(1).!.map(_.toInt) ) def parens[_: P]: P[Int] = P( "(" ~/ addSub ~ ")" ) def factor[_: P]: P[Int] = P( number | parens ) def divMul[_: P]: P[Int] = P( factor ~ (CharIn("*/").! ~/ factor).rep ).map(eval) def addSub[_: P]: P[Int] = P( divMul ~ (CharIn("+\\-")
Game development in Scala - Michael Shaw
How functional programming helps me sleep at night Me Michael Shaw Scala for 4 years (Scalatra/Akka/Game Dev) Ruby on Rails at We Are Brand New 10 months in to developing a game in Scala Mostly functional brain Context Problem False Starts Solution Reflection Lich Developed from scratch in Scala ... accidentally You're a lich raising an undead army in an open & alive world Lots of voxels Lots of c
GitHub - djspiewak/gll-combinators: A parser combinator library based on the GLL algorithm
GLL Combinators is a framework designed to implement the GLL parsing algorithm (Scott and Johnstone, LDTA 2009) in a functional manner. More specifically, the framework makes use of atomic parser combinators to compose grammars which are then evaluated using the GLL algorithm. The framework provides a syntax for this task which is almost identical to that of the parser combinator framework built i
Androidプãƒã‚¸ã‚§ã‚¯ãƒˆ(pfn)ã®giter8テンプレート - OE_uia Tech Blog
Scalaã§Androidアプリを作るãŸã‚ã®sbtプラグインã€pfn/android-sdk-pluginã®ç´¹ä»‹ã‚’å‰å›žã®ãƒ–ãƒã‚°ã§ã—ã¾ã—ãŸã€‚ ãŒã€ã“ã®READMEã®é€šã‚Šã«ãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã‚’作るã®ãŒé¢å€’ãªã®ã§ã€giter8テンプレートも作ã£ã¦ã¿ã¾ã—ãŸã€‚ プãƒã‚¸ã‚§ã‚¯ãƒˆä½œæˆ 1 g8 taisukeoe/android-pfn-app.g8 ã‹ã‚‰ãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã®é››å½¢ãŒä½œã‚Œã¾ã™ã€‚ giter8ãŒå…¥ã£ã¦ã„ãªã„人ã¯brew install giter8ã¨ã‹ã§ã€‚ ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªæ§‹é€ ã“ã‚“ãªæ„Ÿã˜ã§ã™ã€‚ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 MyAndroidProject ├── .gitignore ├── AndroidManifest.xml ├── build.sbt ├── local.properties ├── proguard-project.txt ├──
sbt テクノãƒã‚¸ãƒ»ãƒ—リビュー: auto plugin · eed3si9n
2014-03-29 / scala / sbt Preview of upcoming sbt 1.0 features: Read about the new plugins を訳ã—ã¾ã—ãŸã€‚ è‘— @eed3s9n, @jsuereth sbt ã«å¤‰åŒ–ãŒè¨ªã‚Œã‚ˆã†ã¨ã—ã¦ã„る。sbt 1.0 ã¸å‘ã‘㦠sbt ã®åŽŸç†ã§ã‚る自動化 (automation)ã€ã‚¤ãƒ³ã‚¿ãƒ©ã‚¯ã‚·ãƒ§ãƒ³ (interaction)ã€çµ±åˆåŒ– (integration) ã®å…¨é¢ã«ãŠã„ã¦æ”¹å–„ãŒã¿ã‚‰ã‚Œã‚‹äºˆå®šã 。1.0 ã®äºŒå¤§æ©Ÿèƒ½ã¨ç›®ã•ã‚Œã¦ã„ã‚‹ã®ã¯ auto plugin ã¨ã€Œãƒ“ルドサーãƒã¨ã—ã¦ã® sbtã€ã® 2ã¤ã 。 今後ã®æ•°ãƒ¶æœˆã«ã‚ãŸã£ã¦ sbt ãƒãƒ¼ãƒ 㯠sbt 0.13 コードベース上ã«ã“れらã®æ©Ÿèƒ½ã‚’è¿½åŠ ã—ãŸãƒ—リビュー版をリリースã™ã‚‹ã€‚ã“れらã®ãƒ—リビュー版ã«ã‚ˆã£ã¦ã€sbt 1.0 ã®ä»•æ§˜ãŒå›ºã¾ã‚‹å‰ã«ã‚³ãƒŸãƒ¥ãƒ‹ãƒ†ã‚£ãƒ¼ã‹ã‚‰ã®ãƒ•ã‚£ãƒ¼
Of Algebirds, Monoids, Monads, and other Bestiary for Large-Scale Data Analytics
Have you ever asked yourself what monoids and monads are, and particularly why they seem to be so attractive in the field of large-scale data processing? Twitter recently open-sourced Algebird, which provides you with a JVM library to work with such algebraic data structures. Algebird is already being used in Big Data tools such as Scalding and SummingBird, which means you can use Algebird as a me
sbt0.13.2-M1ã®æ–°ã—ã„インクリメンタルコンパイル試ã—ãŸã‚‰ç´ 晴らã—ã„çµæžœãŒã§ãŸ - xuwei-k's blog
140æ–‡å— âœ• 2ã§è¡¨ã™ã¨ã“ã‚“ãªæ„Ÿã˜ sbt 0.13.1[info] Compiling 1 Scala source[info] Compiling 7[info] Compiling 84[info] Compiling 240[success] Total time: 259 s 2014-01-10 12:56:08 via web sbt 0.13.2-M1[info] Compiling 1 Scala source[success] Total time: 15 sURL URLAwesome!!! 2014-01-10 12:56:52 via web to @xuwei_k 測定方法㯠Scalazã®ã€ç¾çŠ¶ã®æœ€æ–°ã®coreモジュールを使ã£ã¦å®Ÿé¨“ EphemeralStreamã«headOptionã¨tailOptionã¨ã„ã†2ã¤ã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚’è¿½åŠ ã™ã‚‹ã‚³ãƒŸãƒƒãƒˆã‚’使用 htt
How to be polymorphic in Scala
Polymorhism is a programming language feature that allows one interface to be used for a general class of actions. John C. Reynolds. Theories of programming languages. Cambridge University Press, New York, NY, USA, 1999. Parametric (type as parameter) defined on functions or a data types so that they can be written generically and it can handle values identically without depending on their type. c
Pavel Fatin » Blog Archive » Design Patterns in Scala - Blog about human and technology
This article shows how Scala adopts and transforms the classical software design patterns. The content of the article is also (independently) translated into Russian and Chinese. Design pattern is a general reusable solution to a commonly occurring problem in software design. A design pattern is not a finished code, but rather a template for how to solve a problem that can be used in many differen
抽象的㪠Future · eed3si9n
2012-12-12 / scalaz ã“れ㯠Scalaz Advent Calendar 2012 12日目ã®è¨˜äº‹ã§ã™ã€‚ 次々㨠Scala ç•Œã®çŸ¥èƒ½æ´¾ã‚’集çµã•ã›ã¦ã„ã‚‹ Precog 社ã®é–‹ç™ºãƒãƒ¼ãƒ ã‹ã‚‰ã®ãƒ–ãƒã‚° Precog.Copointed。今日㯠blueeyes ãªã©ã®é–‹ç™ºã§ã‚‚知られる Kris Nuttycombe (@nuttycom) ã•ã‚“ãŒæ›¸ã„㟠The Abstract Future を翻訳ã—ã¾ã—ãŸã€‚翻訳ã®å…¬é–‹ã¯æœ¬äººã‚ˆã‚Šè¨±è«¾æ¸ˆã¿ã§ã™ã€‚ 2012å¹´11月27æ—¥ Kris Nuttycombe è‘— 2012å¹´12月11æ—¥ e.e d3si9n 訳 Precog 開発ブãƒã‚°ã®å‰å›žã¯åƒ•ãŸã¡ãŒ Cake パターンを使ã£ã¦ã‚³ãƒ¼ãƒ‰ãƒ™ãƒ¼ã‚¹ã‚’æ§‹é€ åŒ–ã—ã¦ã€ã‚®ãƒªã‚®ãƒªã¾ã§å®Ÿè£…型を抽象化ã—ã¦ã—ã¦ã„ã‚‹ã“ã¨ã‚’ Daniel ãŒæ›¸ã„ãŸã€‚ãã®è¨˜äº‹ã§ã®èª¬æ˜Žã®ã¨ãŠã‚Šã€ã“ã‚Œã¯éžå¸¸ã«å¼·åŠ›ãªæ¦‚念ã 。型をå˜åœ¨åž‹ã¨
翻訳: "Cake Pattern: The Bakery from the Black Lagoon" - Okapies' Archive
ã¯ã˜ã‚ã« NEScala 2013 ã§ã® Daniel Spiewak (@djspiewak) ã•ã‚“ã®åŸºèª¿è¬›æ¼” "Cake Pattern: The Bakery from the Black Lagoon"（スライドã€å‹•ç”»ï¼‰*1ã®æŠ„訳ã§ã™ã€‚本記事ã®å…¬é–‹ã«ã¤ã„ã¦ã¯ã€è¬›æ¼”者㮠Spiewak ã•ã‚“ã€ãŠã‚ˆã³é…ä¿¡å…ƒã§ã‚ã‚‹ Marakana Inc. ã•ã‚“ã«è¨±å¯ã‚’é ‚ã„ã¦ã„ã¾ã™ã€‚Thank you for your great kindness! 講演者㮠Spiewak ã•ã‚“ã¯ã€Scala ã®ãƒ‡ã‚£ãƒ¼ãƒ—ãªæ´»ç”¨ã§æœ‰å㪠Precog ã®é–‹ç™ºã«æºã‚ã£ã¦ã„ã‚‹æ–¹ã§ã™ã€‚â€ãƒ¢ãƒŠãƒ‰ã¯ãƒ¡ã‚¿ãƒ•ã‚¡ãƒ¼ã§ã¯ãªã„ (Monads Are Not Metaphors)â€ã®è‘—者ã§ã‚‚ã‚ã‚Šã¾ã™ã€‚ ã“ã®è¬›æ¼”ã¯ã€æ˜¨å¹´ã®ãƒ–ãƒã‚°è¨˜äº‹ "Existential Types FTW" ã®è°è«–ã‚’ã•ã‚‰ã«æŽ˜ã‚Šä¸‹ã’ãŸã‚‚ã®ã§ã€Precog ã§ã® "Ca
sbt 0.13.0 ã®å¤‰æ›´ç‚¹ · eed3si9n
2013-07-24 / sbt æ¦‚è¦ äº’æ›æ€§ã«å½±éŸ¿ã®ã‚る新機能ã€å¤‰æ›´ç‚¹ã€ãƒã‚°ä¿®æ£ sbt ã¨ãƒ“ルド定義を Scala 2.10 ã«ç§»è¡Œã—ãŸã€‚ project/plugins/ 内ã«ç½®ã‹ã‚ŒãŸãƒ—ラグインã®è¨å®šãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚µãƒãƒ¼ãƒˆã‚’廃æ¢ã—ãŸã€‚ã“れ㯠0.11.2 より廃æ¢äºˆå®šã«ãªã£ã¦ã„ãŸã€‚ set コマンドã«ãŠã„ã¦ã‚»ãƒƒãƒ†ã‚£ãƒ³ã‚°ã®å³è¾ºé …内ã®ã‚¿ãƒ–補完を廃æ¢ã—ãŸã€‚æ–°ãŸã«è¿½åŠ ã•ã‚ŒãŸã‚¿ã‚¹ã‚¯ãƒžã‚¯ãƒãŒã“ã®ã‚¿ãƒ–補完をä¸è¦ã«ã™ã‚‹ã‹ã‚‰ã 。 ã‚ーã®æ…£ç”¨çš„ãªæ›¸ãæ–¹ã¯ã“れよりã‚ャメルケース camelCase ã®ã¿ã¨ã™ã‚‹ã€‚詳細ã¯å¾Œã»ã©ã€‚ Maven ã¨ã®äº’æ›æ€§ã‚’æ£ã™ãŸã‚ã€ãƒ†ã‚¹ãƒˆã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã® classifier ã‚’ tests ã«ä¿®æ£ã—ãŸã€‚ ã‚°ãƒãƒ¼ãƒãƒ«ãªã‚»ãƒƒãƒ†ã‚£ãƒ³ã‚°ã¨ãƒ—ラグインã®ãƒ‡ã‚£ãƒ¬ã‚¯ãƒˆãƒªã‚’ãƒãƒ¼ã‚¸ãƒ§ãƒ³ä»˜ã‘るよã†ã«ã—ãŸã€‚デフォルトã§ã¯ã€ã‚°ãƒãƒ¼ãƒãƒ«ã‚»ãƒƒãƒ†ã‚£ãƒ³ã‚°ã¯ ~/.sbt/0.13/ ã«ã€ã‚°ãƒãƒ¼ãƒãƒ«ãƒ—ラグイン㯠~/
[Deprecated]Scalaã§Androidアプリを作るã«ã¯(IntelliJ IDEA + Sbt) - OE_uia Tech Blog
ã“ã®è¨˜äº‹ã®å†…容ã¯åŸ·ç†å½“時ã®ã‚‚ã®ã§ã™ã€‚最新ã®å†…容ã¯ã“ã¡ã‚‰ã‚’å‚ç…§ã—ã¦ãã ã•ã„。 LinkedInã®ãƒ–ãƒã‚°ã§ã€Eclipseベースã®Scalaã«ã‚ˆã‚‹Androidアプリ開発環境ãŒç´¹ä»‹ã•ã‚Œã¦ã¾ã—ãŸã€‚（ã¨ã€ @okapiesã•ã‚“ã«æ•™ãˆã¦ã„ãŸã ãã¾ã—ãŸã€‚ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚) The technology behind EatIn: Android apps in Scala, iOS apps, and Play Framework web services ã†ã¡ã®Android Scala開発環境ã¯IntelliJ IDEA + sbtãªã®ã§ã€æŠ˜è§’ãªã®ã§ã“ã‚“ãªé¢¨ã«ã‚‚出æ¥ã¾ã™ã‚ˆã¨ç´¹ä»‹ã—ã¦ã¿ã¾ã™ã€‚本当ã¯LinkedInブãƒã‚°ã«å¯¾æŠ—ã—㦠(sorry eclipse users!!) ã£ã¦æ›¸ããŸã‹ã£ãŸw ã®ã§ã™ãŒã€IntelliJã¯ã‚¨ãƒ‡ã‚£ã‚¿ã¨ã—ã¦ä½¿ã£ã¦ã‚‹ã ã‘ãªã®ã§ã€Eclipseã«å¤‰ãˆã¦ã‚‚大ã—ã¦æ”¯éšœãª
日本一ã‚ã‹ã‚Šã‚„ã™ã„ Akka ã® IOManager 㨠SocketHandle(ã‚„ServerHandle)ã€ãれ㫠IO.Iteratee 㨠IO.IterateeRef - 猫型ã®è“„音機㯠1 分間㫠45 回ã«ã‚ƒã‚ã¨é³´ã
ã¡ã‚‡ã£ã¨ã“ã®ã‚ãŸã‚ŠãŒè¤‡é›‘ã«æ„Ÿã˜ãŸã®ã§ã€ä¸€åº¦æ•´ç†ã—ã¦ãŠã。ã¾ã全部「公å¼èªã‚ã°æ›¸ã„ã¦ã‚るよã€ã§ OK ãªã‚“ã ã‘ã©ã€ãã‚Œã§ã¯ã‚ã¾ã‚Šã«ãƒžãƒƒãƒãƒ§ã™ãŽã‚‹ã—ã‚ãŸã—ãŒã‚ã¨ã‹ã‚‰å‚ç…§ã—ãŸã„ã—ã¿ãŸã„ãªæ„Ÿã˜ã€‚ IOManager ã¨ã¯ãªã«ã‹ Akka ã§IOを扱ã†ã¨ãã«ã¯ã€ IOManager を通ã˜ã¦è¡Œã†ã¨è‰¯ã„。実際㮠IO ã®ç…©ã‚ã—ã„ã“ã¨ã‚’éš è”½ã—ã¦ãれる。IOManager 㯠IOManagerActor ã¨ã„ã†ã‚¢ã‚¯ã‚¿ãƒ¼ã¸ã®ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã§ã‚ã‚Šã€å®Ÿéš›ã«Actã—ã¦ãれるã®ã¯ IOManagerActor ã®ã‚ˆã†ã 。IOManager ã¯æ‰‹å‹•ã§æ¢ã‚ãŸã‚Šã™ã‚‹å¿…è¦ã¯ãªãã€ç®¡ç†ã™ã‚‹ IO ãŒç„¡ããªã‚Œã°å‹æ‰‹ã«æ¢ã¾ã£ã¦ãれるらã—ã„。賢ã„。 IOManager を通ã˜ã¦ã‚½ã‚±ãƒƒãƒˆã‚’作るã«ã¯ã€IOManager#connect ã‚„ IOManager#listen を呼ã³å‡ºã™ã€‚ãã‚Œãžã‚Œ SocketHandle ã‚„ Serve
Scala + akka ã§ç°¡å˜ãªãƒãƒ£ãƒƒãƒˆã‚µãƒ¼ãƒãƒ¼ã‚’書ã„ã¦ã¿ãŸã®ã§è§£èª¬ã—ã¦ã¿ã‚‹ã‚ˆ - 猫型ã®è“„音機㯠1 分間㫠45 回ã«ã‚ƒã‚ã¨é³´ã
ï¼ï¼ï¼CAUTIONï¼ï¼ï¼ ã“ã®è¨˜äº‹ã§æ‰±ã£ã¦ã„ã‚‹ IO ã®ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ã‚¤ã‚¹ã¯ Akka 2.2 㧠ã™ã§ã« old-io 扱ã„ã¨ãªã‚Š( http://doc.akka.io/docs/akka/2.2.0/scala/io-old.html )ã€Akka 2.3 ã‹ã‚‰ã¯å‰Šé™¤ã•ã‚Œã¦ã—ã¾ã£ã¦ã„ã¾ã™ã€‚ 今ãªã‚‰ã°ã“ã¡ã‚‰ã‚’å‚考ã«ã•ã‚ŒãŸã»ã†ãŒã„ã„ã§ã—ょã†ã€‚ I/O ã¾ã‚り： http://doc.akka.io/docs/akka/2.3.7/scala/io.html TCPã®ãƒãƒ³ãƒ‰ãƒªãƒ³ã‚°ï¼šhttp://doc.akka.io/docs/akka/2.3.7/scala/io-tcp.html 本文 akka ã¨ã„ã†ã®ã¯ Scala 㧠Actor モデルを実ç¾ã™ã‚‹ãŸã‚ã®ãƒ©ã‚¤ãƒ–ラリã ã¨æ€ãˆã°ã„ã„ã£ã½ã„。ã“ã®è¨˜äº‹ã‚’èªã‚€ãŸã‚ã«ã¯ case class ã¨ãƒ‘ターンマッãƒã¨ã‚¢ã‚¯ã‚¿ãƒ¼ãƒ¢ãƒ‡ãƒ«ã«ã¤ã„ã¦ã®çŸ¥è˜ãŒæœ€ä½Ž
Scalaã§<:<ã¨ã‹=:=を使ã£ãŸgeneralized type constraintsãŒã‚¹ã‚´ã™ãŽã¦æ„Ÿå‹•ã—ãŸè©± - ( ꒪⌓꒪) ゆるよã‚日記
Scala2.8ã‹ã‚‰ã€Predefã«<:<ã¨ã‹=:=ã¨ã‹ãŒå®šç¾©ã•ã‚Œã¦ã„ã¦ã€ã“ã‚Œãªã‚“ã ã‚?ã¨ãšãƒ¼ã£ã¨ç–‘å•ã ã£ãŸè¨³ã§ã™ã‚ˆã€‚ã§ã€ã¤ã„ã£ãŸãƒ¼ã§è³ªå•æŠ•ã’ã¦ãŸã‚‰ã‚„ã£ã¨ç†è§£ã§ãã¾ã—ãŸã€‚ æ•™ãˆã¦é ‚ã„㟠@ScalaTohoku ã•ã‚“ã€@okomok ã•ã‚“ã€@tioa ã•ã‚“ã€æœ‰ã‚Šé›£ã†ã”ã–ã„ã¾ã—ãŸ! "generalized type constraints"ã¨ã„ã†ãƒ¤ãƒ„ã§ã€åž‹ãƒ‘ラメータã«ä¸Žãˆã‚‰ã‚ŒãŸåž‹ãŒã€ç‰¹å®šã®æ¡ä»¶ã‚’満ãŸã™å ´åˆã«ã®ã¿å‘¼ã³å‡ºã›ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã‚’定義ã§ãã‚‹ã¨ã„ã†ã‚‚ã®ã§ã™ã€‚ã—ã‹ã‚‚コンパイル時ã«é™çš„ã«ãƒã‚§ãƒƒã‚¯ã•ã‚Œã‚‹!! ã“ã‚Œã¯ã‚¹ã‚´ã„!! What do <:<, <%<, and =:= mean in Scala 2.8, and where are they documented? - Stack Overflow =:=ã‚„<:<ã‚„<%<ã§ç‰¹å®šã®åž‹ã®ã¿å‘¼ã³å‡ºã›ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã‚’定義ã™ã‚‹ 具体的ãªä¾‹ã§èª¬æ˜Žã—ã¾ã™ã€‚
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