パイプライン演算åã®æ´å² - ã¾ã‚ã‚ã‚‚
(You can read this article in English.) Ruby ã®é–‹ç™ºç‰ˆã«ãƒ‘イプライン演算å（pipeline operator）ãŒè©¦é¨“çš„ã«å°Žå…¥ã•ã‚Œã¾ã—ãŸãŒã€ã„ã‚ã„ã‚ã‚ã£ã¦ãƒ—ãƒç‚Žä¸Šã«ãªã£ã¦ã„ã¾ã™ï¼ˆãƒã‚±ãƒƒãƒˆï¼‰ã€‚ ã›ã£ã‹ãã®æ©Ÿä¼šãªã®ã§ã€ãƒ‘イプライン演算åã®æ´å²ã‚’調ã¹ã¦ã¿ã¾ã—ãŸã€‚付ã‘焼ã刃ã®èª¿æŸ»ãªã®ã§ã€é–“é•ã£ã¦ãŸã‚‰æ•™ãˆã¦ãã ã•ã„。 パイプライン演算åã¨ã¯ ã“ã‚“ãªæ„Ÿã˜ã®ã‚‚ã®ã§ã™ã€‚ x |> f |> g |> h # h(g(f(x))) ã¨åŒã˜æ„味 h(g(f(x))) ã¨ã„ã†é–¢æ•°é©ç”¨ã®å¼ã¯ã€é–¢æ•°ãŒå‘¼ã°ã‚Œã‚‹é †åºï¼ˆf→g→h）ã¨ã€ãƒ—ãƒã‚°ãƒ©ãƒ ã®å—é¢ä¸Šã®é †åºï¼ˆh→g→f）ãŒé€†ã§ã‚ã‹ã‚Šã«ãã„ã¨ã•ã‚Œã¾ã™ã€‚ã“ã®å•é¡Œã¯ã€ç‰¹ã«ã€é–¢æ•°ãŒå¤§ãããªã£ãŸã¨ãã«é¡•è‘—ã«ãªã‚Šã¾ã™ã€‚ wonderful_process_h( marvelous_process_g( fantastic_process
Elixir プãƒã‚»ã‚¹å…¥é–€
Elixir ã®ãƒ—ãƒã‚»ã‚¹ã‚’å¦ç¿’ã™ã‚‹éš›, 予ã‚プãƒã‚»ã‚¹é–¢é€£ã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«éƒ¡ã®é–¢ä¿‚性を大雑把ã«ç†è§£ã—ã¦ã„ãŸæ–¹ãŒ, 記憶定ç€ãŒè‰¯ã„ã§ã‚ã‚ã†ã¨è€ƒãˆ, ã“ã®ã‚¹ãƒ©ã‚¤ãƒ‰ã‚’作æˆã—ã¾ã—ãŸ. 主ã«, Task, GenServer, Agent, Supervisor, DynamicSupervisor, Task.Supervisor, Registry ãªã©ã‚’解説ã—ã¦ã„ã¾ã™.
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Phoenixã®ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚° - Qiita
Phoenix ã§ã€å—ã‘å–ã£ãŸ URL ã‚’ã©ã†ã‚„ã£ã¦ãƒ‡ã‚£ã‚¹ãƒ‘ッãƒã—ã¦ã„ã‚‹ã®ã‹æ°—ã«ãªã£ãŸã®ã§ã€mix phoenix.new hello_world ã§ç”Ÿæˆã—ãŸãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã‹ã‚‰ã€é †ç•ªã«èªã‚“ã§ã„ã£ãŸã€‚ HelloWorld.start/2 hello_world/lib/hello_world.ex: defmodule HelloWorld do ... def start(_type, _args) do ... children = [ # Start the Ecto repository supervisor(HelloWorld.Repo, []), # Start the endpoint when the application starts supervisor(HelloWorld.Endpoint, []), ] opts = [strategy: :one_for_on
生ã¿ã®è¦ªãŒèªžã‚‹Elixirã®ã“ã‚Œã¾ã§ã¨ã“ã‚Œã‹ã‚‰ ―「ElixirConfJapan 2017ã€å‚åŠ ãƒ¬ãƒãƒ¼ãƒˆ | gihyo.jp
2017å¹´4月1æ—¥ã€ç§‹è‘‰åŽŸã‚³ãƒ³ãƒ™ãƒ³ã‚·ãƒ§ãƒ³ãƒ›ãƒ¼ãƒ«ã«ã¦ã€ŒElixirConfJapan 2017ã€ãŒé–‹å‚¬ã•ã‚Œã€300人を超ã™å‚åŠ è€…ãŒé›†ã¾ã‚Šå¤§ç››æ³ã¨ãªã‚Šã¾ã—ãŸã€‚ãã®æ¨¡æ§˜ã‚’レãƒãƒ¼ãƒˆã—ã¾ã™ã€‚ オープニングã®æ¨¡æ§˜ オープニングã‚ーノートセッション ―José Valimæ° ã‚ªãƒ¼ãƒ—ãƒ‹ãƒ³ã‚°ã‚ーノートã¯Elixirã®ä½œè€…ã§ã‚ã‚‹José Valimæ°ã«ã‚ˆã‚‹è¬›æ¼”ã§ã™ã€‚2017å¹´1月ã§5æ³ã«ãªã‚‹Elixirã®æ´å²ã¨ä»Šå¾Œã®å±•æœ›ã«ã¤ã„ã¦ç™ºè¡¨ã—ã¾ã—ãŸã€‚ José Valimæ° ä½•æ•…Elixirを作ã‚ã†ã¨ã—ãŸã®ã‹ 2011å¹´ã€ä¸¦è¡Œå‡¦ç†ã®é‡è¦æ€§ãŒé«˜ã¾ã‚Šã‹ã‚‰ã€ãã®èª²é¡Œè§£æ±ºã®ã‚¢ãƒ—ãƒãƒ¼ãƒã¨ã—ã¦ã€é–¢æ•°ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã«æ³¨ç›®ã—ãŸã¨Joséæ°ã¯èªžã‚Šå§‹ã‚ã¾ã—ãŸã€‚ Rubyã‚„Pythonç‰ã®ã‚ªãƒ–ジェクト指å‘プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã§ã¯ã€è¤‡æ•°ã®ã‚¹ãƒ¬ãƒƒãƒ‰é–“ã§ä¸¦è¡Œçš„ã«ã‚ªãƒ–ジェクトã®çŠ¶æ…‹æ“作を行ã†ã®ã¯é›£ã—ã„ã¨ã„ã†å•é¡ŒãŒã‚ã‚Šã¾ã™ã€‚ãã“ã§ã€é–¢æ•°ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
WebSocket大åˆæˆ¦ï¼šClojureã€C++ã€Elixirã€Goã€NodeJSã€Ruby | POSTD
Webアプリã«ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ ã®åŒæ–¹å‘通信ãŒå¿…è¦ãªå ´åˆã€WebSocketã‚’é¸ã¶ã®ã¯è‡ªç„¶ãªã“ã¨ã ã¨æ€ã„ã¾ã™ã€‚ã§ã¯ã€ã©ã®ãƒ„ールã§WebSocketサーãƒã‚’構築ã™ã¹ãã§ã—ょã†ã‹ã€‚パフォーマンスã¯é‡è¦ã§ã™ãŒã€é–‹ç™ºã®ãƒ—ãƒã‚»ã‚¹ã‚‚見éŽã”ã—ã¦ã¯ãªã‚Šã¾ã›ã‚“。パフォーマンスを基準ã«ã™ã‚‹ã ã‘ã§ãªãã€é–‹ç™ºã®ã—ã‚„ã™ã•ã‚‚考慮ã«å…¥ã‚Œã‚‹ã¹ãã§ã—ょã†ã€‚今回ã®å¤§åˆæˆ¦ã§ã¯ã€Clojureã€C++ã€Elixirã€Goã€NodeJSã€Rubyã®ãã‚Œãžã‚Œã®è¨€èªžã«ã‚ˆã£ã¦æ…£ç”¨çš„ãªæ‰‹æ³•ã§å®Ÿè£…ã•ã‚ŒãŸã‚·ãƒ³ãƒ—ルãªWebSocketサーãƒã‚’比較ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ テスト内容 サーãƒã«å®Ÿè£…ã™ã‚‹ã®ã¯ã€ echo 㨠broadcast ã®2ã¤ã®ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã®ã¿ã‚’扱ã†éžå¸¸ã«å˜ç´”ãªãƒ—ãƒãƒˆã‚³ãƒ«ã§ã™ã€‚echoã¯é€ä¿¡ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã«è¿”ã•ã‚Œã€ãƒ–ãƒãƒ¼ãƒ‰ã‚ャストã¯å…¨ã¦ã®æŽ¥ç¶šã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã«é€ä¿¡ã•ã‚Œã¾ã™ã€‚ãã—ã¦ãƒ–ãƒãƒ¼ãƒ‰ã‚ャストãŒå®Œäº†ã™ã‚‹ã¨ã€çµæžœãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ãŒé€ä¿¡è€…ã«è¿”ã•ã‚Œã¾ã™ã€‚
Special Processes in OTP
On a recent Elixir project, I needed to test some asynchronous behaviour. Doing so led me to learn about the basics of special processes in OTP. Our project was using Phoenix Channels and had a need to keep track of all connected socket processes. We could have used the upcoming Phoenix presence feature, but we didn’t quite need all of its features. We settled on using a simple GenServer process t
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