eed3si9n
december adventure 2024 2024-12-11 I’m going to try to work on something small everyday during december. see the original December Adventure. my goal: work on sbt 2.x, other open source like sbt 1.x and plugins, or some post on this site, like music or recipe. 2024-12-11 continuing with the Scala 3.6.2 theme. anytime Scala syntax changes are introduced, there are sometimes period of adjustment for
GitHub - fpinscala/fpinscala: Code, exercises, answers, and hints to go along with the book "Functional Programming in Scala"
This repository contains exercises, hints, and answers for the book Functional Programming in Scala. Along with the book itself, it's the closest you'll get to having your own private functional programming tutor without actually having one. There are two main branches in this repository: first-edition second-edition Be sure to select the branch which matches the edition of the book you are readin
Scalaã®PartialFunctionãŒä¾¿åˆ©ã§ã™ã‚ˆ - ( ꒪⌓꒪) ゆるよã‚日記
Scalaã«ã¯ã€PartialFunctionã¨ã„ã†ã‚‚ã®ãŒã‚ã‚Šã¾ã™ã€‚ 直訳ã™ã‚‹ã¨éƒ¨åˆ†é–¢æ•°ã§ã™ãŒã€ã“ã‚Œã¯ãªã«ã‹ã£ã¦ã„ã†ã¨ã€Œç‰¹å®šã®å¼•æ•°ã«å¯¾ã—ã¦ã¯çµæžœã‚’è¿”ã™ã‘ã©ã€çµæžœã‚’è¿”ã›ãªã„引数もã‚るよã†ãªä¸é€”åŠç«¯ãªé–¢æ•°ã€ã§ã™ã€‚ ã©ã†ã‚„ã£ã¦ä½¿ã†ã®ã‚“? ã¾ãã€ã¡ã‚‡ã£ã¨ä¾‹ã‚’見ã¦ã¾ã—ょã†ã‚„。PartialFunctionã§ã‚ã‚‹fooPfã¯ã€å¼•æ•°ãŒ"foo"ã ã£ãŸã‚‰"bar"ã‚’è¿”ã—ã¦ã€"foo"以外ã¯çŸ¥ã‚‰ã‚“ã¨ã„ã†ã¦ãã¨ãƒ¼ãªé–¢æ•°ã§ã™ã€‚ scala> val fooPf:PartialFunction[String,String] = { case "foo" => "bar" } fooPf: PartialFunction[String,String] = <function1> scala> fooPf("foo") res5: String = bar scala> fooPf("hoge") scala.Mat
Scalaã®null/Nothing/Nil/Noneã¯ã‚„ã‚Šã™ãŽãªã®ã‹ï¼Ÿ - ãã‚‹ãる～
Twitterã—ã¦ãŸã‚‰ç›®ã«å…¥ã£ãŸã®ã§è»½ã。 Javaã«ãŠã‘ã‚‹null。ã“ã‚Œã¾ã§ã¨ã“ã‚Œã‹ã‚‰ ã“ã®å¾Œã®ã‚¹ãƒ©ã‚¤ãƒ‰ã§ã€ Scalaã«ãŠã‘る「何もãªã„ã‚‚ã®ã€ã®åˆ†é¡žã¯ã‚„ã‚ŠéŽãŽæ„Ÿã¯ã‚ã‚‹ ã¨è¨€ã‚ã‚Œã¦ã„ã‚‹ã‚“ã§ã™ãŒã€ã‚る程度ã¯èª¤è§£ã«åŸºã¥ãæ„見ã よãªãã“ã‚Œã¯ã€ã¨ã„ã†ã“ã¨ã‚’言ã£ã¦ãŠã“ã†ã‹ãªã¨ã€‚ Scalaã«ã¤ã„㦠日本ã§ã¯èª¬æ˜ŽãŒä¸è¦ãªãらã„Scalaã£ã¦æœ‰åã«ãªã£ã¦ã‚‹ã¨æ€ã†ã‚“ã§ã™ãŒä¸€å¿œã€‚ Scalaã¯JVMã®ä¸Šã§å‹•ä½œã™ã‚‹ã€(クラス指å‘ã®)オブジェクト指å‘プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã¨é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã‚’èžåˆã•ã›ãŸè¨€èªžã§ã™ã€‚ ãã—ã¦ã€Scalaã®ã‚³ã‚¢æ©Ÿèƒ½ã¯ã©ã¡ã‚‰ã‹ã¨ã„ã†ã¨ã‚ªãƒ–ジェクト指å‘プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°å¯„ã‚Šã§ã™ã€‚ オブジェクト指å‘プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã‚’ベースã«ã€é–¢æ•°åž‹ã®è‰²ã€…ãªã‚‚ã®ã‚’実ç¾ã—ã¦ã„ã‚‹æ„Ÿã˜ã§ã™*1。 オブジェクト指å‘プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°çš„ãªæ©Ÿèƒ½ã¨ã—ã¦çœŸã£å…ˆã«æ€ã„ã¤ãã®ã¯ä½•ã§ã—ょã†ã‹ï¼Ÿ 割ã¨ä¸Šä½ã®æ–¹ã«ã€ã€Œç¶™æ‰¿ã€ã¨ã‹ã€Œåž‹éšŽå±¤ã€ã¨ã‹æ¥ã‚‹ã‚“
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Scala界隈ã§DDDãŒå¤§ã„ã«ç››ã‚Šä¸ŠãŒã£ãŸã®ã§ãƒã‚°ã‚’ã¾ã¨ã‚ã¾ã—ãŸã‚ˆ-ãã®1 - Kuchitama Tech Note
以å‰ã€ScalaJpã®gitter.imã§DDDã«ã¤ã„ã¦è°è«–ãŒç››ã‚“ã«è¡Œã‚ã‚Œã¦ãŸã‘ã©ã€ã„ãšã‚Œãƒã‚°ãŒæ¶ˆãˆã¡ã‚ƒã†ã®ãŒã‚‚ã£ãŸã„ãªãã¦ã€ã“ã“ã«å†…容を貼付ã‘ã¾ã™ã€‚ scalajp/public - Gitter è¦ç´„ã™ã‚‹ã¨å®Ÿè·µDDD本出ãŸã‚‰ã¿ã‚“ãªã§èªã‚‚ã†ãœã€‚ã£ã¦ã“ã¨ã§ã€‚ 実践ドメイン駆動è¨è¨ˆ (Object Oriented Selection) 作者: ヴァーン・ヴァーノン,高木æ£å¼˜å‡ºç‰ˆç¤¾/メーカー: 翔泳社発売日: 2015/03/17メディア: 大型本ã“ã®å•†å“ã‚’å«ã‚€ãƒ–ãƒã‚° (1件) を見る ホントã¯ã€è‡ªåˆ†ã®ãƒ–ãƒã‚°ã¨ã‹ã˜ã‚ƒãªãã¦Gistã¨ã‹ãŒã„ã„ã‚“ã ã‚ã†ã‘ã©ã€è¦‹ãŸç›®ã‚’æ•´ãˆã‚‹ã®ãŒä¸€ç•ªæ¥½ãªã®ã§ã€ã“ã“ã«æŽ²è¼‰ã—ã¦ãŠãã¾ã™ã€‚ 一応ã€æœ€åˆã«ã¾ã¨ã‚ã‚‹ã«ã„ãŸã£ãŸçµŒç·¯â†“ xuwei-k 2015å¹´2月24æ—¥ gitterã€ç„¡æ–™ã ã¨ãƒã‚°ã®ä¿å˜æœŸé–“2週間ã£ã¦è©±ã ã£ãŸã‘ã©ã€å®Ÿã¯ç¾çŠ¶å…¨éƒ¨æ®‹ã£ã¦ã‚‹ https://gitte
Reactive Streamsã¨ã¯ï¼Ÿ - ãŸã‘ãžã†ç€•æ»ãƒ–ãƒã‚°
Reactive Streamsã¨ã„ã†ã®ã¯ãƒŽãƒ³ãƒ–ãƒãƒƒã‚ングãªback pressureå¯èƒ½ãªéžåŒæœŸã‚¹ãƒˆãƒªãƒ¼ãƒ 処ç†ã®æ¨™æº–çš„ãªä»•æ§˜ã‚’æä¾›ã—よã†ã¨ã„ã†ã‚‚ã®ã§ã€å®Ÿè£…ã¨ã—ã¦ã¯Akka Streamsã€RxJavaã€Reactor Composableã€Ratpackãªã©ãŒã‚ã‚Šã¾ã™ã€‚ Reactive Streamsã«ã¤ã„ã¦ã¯Akkaã®ã‚³ãƒŸãƒƒã‚¿ã§ã‚ã‚‹Konrad Malawskiã•ã‚“ã®ä»¥ä¸‹ã®ã‚¹ãƒ©ã‚¤ãƒ‰ãŒã¨ã¦ã‚‚ã‚ã‹ã‚Šã‚„ã™ã„ã§ã™ã€‚ 2014 akka-streams-tokyo-japanese from Konrad Malawski ストリーム処ç†ï¼ˆã¨ã„ã†ã‹éžåŒæœŸãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ãƒ³ã‚°å…¨èˆ¬ã«è¨€ãˆã‚‹ã“ã¨ã§ã™ãŒï¼‰ã§ã¯å—ä¿¡å´ã®å‡¦ç†èƒ½åŠ›ã‚’超ãˆã‚‹ãƒ‡ãƒ¼ã‚¿ã‚’é€ä¿¡ã—続ã‘ã‚‹ã¨ã„ãšã‚Œã‚ャパシティを超ãˆã¦ã‚ªãƒ¼ãƒãƒ¼ãƒ•ãƒãƒ¼ãŒç™ºç”Ÿã—ã¦ã—ã¾ã†ãŸã‚ã€é€ä¿¡å´ã«æ¯”ã¹ã¦å—ä¿¡å´ã®å‡¦ç†èƒ½åŠ›ãŒä½Žã„å ´åˆã¯é€ä¿¡å´ãŒæ‰‹åŠ 減ã—ã¦ãƒ‡ãƒ¼ã‚¿ã‚’é€ä¿¡ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ãª
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「プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°Erlangã€ã®Ring Benchmark ã‚’Akkaã§ã‚„ã£ã¦ã¿ãŸ - Milestones to EVERPEACE 〜alius via〜
「プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°Erlangã€ã®Ring Benchmarkã‚’ã‚„ã£ã¦ã¿ãŸ ã®ç¶šç·¨ã§ã™ã€‚今度ã¯ã€Akkaã§ã‚„ã£ã¦ã¿ã¾ã—ãŸã€‚ github.com/everpeace/ring-benchmark-in-akka Erlangã§ãƒ—ãƒã‚»ã‚¹ã¨ã„ã£ã¦ã„ãŸã®ãŒAkkaã§ã¯ã‚¢ã‚¯ã‚¿ãƒ¼ã«ãªã‚Šã¾ã™ã€‚ ã¡ã‚‡ã£ã¨ã ã‘é•ã†ã®ã¯ã€Erlangã®ãƒ—ãƒã‚»ã‚¹ã¯ Pid = spawn(somefunction) ã£ã¦ã‚„ã‚‹ã¨ã€somefunctionãŒå®Ÿè¡Œã•ã‚Œã‚‹ã¨çµ‚ã‚ã£ã¡ã‚ƒã†ã‘ã‚Œã©ã€Akkaã®ã‚¢ã‚¯ã‚¿ãƒ¼ã¯ class Hoge extends Actor{ def receive ={ case 'msg => println('msg) } } ã¨ã‚„ã£ã¦ã‚‚終ã‚らãšã«ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‚’å¾…ã¡ç¶šã‘ã‚‹ã¨ã“ã‚。ã‚るメッセージをå—ã‘å–ã£ãŸã¨ãã«çµ‚了ã—ãŸã„ãªã‚‰ã€ã“ã‚“ãªé¢¨ã«è‡ªåˆ†ã«PoisonPillを飲ã¾ã›ã¦ã‚„ã‚Œã°OK. class Hoge e
アドテク×Scala×パフォーマンスãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°
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Apache Sparkメモ(Hishidama's Apache Spark Memo)
æ¦‚è¦ [/2017-01-14] Hadoopã¨ã®æ¯”較 [/2014-09-12] サンプル [/2017-01-22] インストール 開発環境ã®æ§‹ç¯‰ [2017-01-22] インストール [/2017-01-14] Sparkシェル [/2014-09-19] 実行方法 [/2017-01-18] API（RDD系） SparkContext [/2014-09-15] RDD [/2017-07-26] パーティション [2014-09-07] Kryo（シリアライズ） [/2015-01-15] Spark SQL [/2014-09-02] Hiveæ“作 [2014-09-01] Streaming [2014-09-02] API（Dataset系） SparkSession [2017-01-14] Dataset [/2020-10-08] Encoder [2017-01
Scalaã§åž‹ã‚¯ãƒ©ã‚¹å…¥é–€ - still deeper
型クラスã«ã¤ã„ã¦ã¤ã‚‰ã¤ã‚‰è€ƒãˆã¦ã„ãŸã“ã¨ã‚’ã¾ã¨ã‚ã¦ãŠãã¾ã™ã€‚マサカリæ“迎。 型クラスã£ã¦ï¼Ÿ 型クラスã¨ã¯ä¸€è¨€ã§ã„ã†ã¨ã€‚ アドホック多相 を実ç¾ã™ã‚‹ã‚‚ã® ã§ã™ã€‚モã‹ã‚‰å§‹ã¾ã‚‹å状ã—難ã„ã‚ã‚Œã¨ã¯ç›´æŽ¥ã¯é–¢ä¿‚ã‚ã‚Šã¾ã›ã‚“。 ã§ã¯ã‚¢ãƒ‰ãƒ›ãƒƒã‚¯å¤šç›¸ã¨ã¯ä½•ã‹ã¨ã„ã†ã¨ ç•°ãªã‚‹åž‹ã®é–“ã§å…±é€šã—ãŸã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã§ã®ç•°ãªã‚‹æŒ¯ã‚‹èˆžã„ã‚’ 定義済ã¿ã®åž‹ã«å¯¾ã—ã¦æ‹¡å¼µã™ã‚‹ よã†ãªå¤šç›¸ã®ã“ã¨ã§ã™ã€‚ ç•°ãªã‚‹åž‹é–“ã§ã®å…±é€šã—ãŸã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã§ã®ç•°ãªã‚‹æŒ¯ã‚‹èˆžã„ Javaã®ç¶™æ‰¿ã‚„インターフェースã€Scalaã®traitを用ã„ã‚‹ã“ã¨ã§ã€ç•°ãªã‚‹åž‹é–“ã§ã®å…±é€šã—ãŸã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã‚’管ç†ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ trait SomeTrait { def someMethod(): String } class Foo extends SomeTrait { def someMethod(): String = "foo" } class Bar ex
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Error handling in Erlang and Scala
Scalaz勉強会 - 資料一覧 - connpass
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