Go ã®ã‚¹ãƒ©ã‚¤ã‚¹ã®å†…部実装 - Block Rockin’ Codes
History 14/05/09: Merge2 ã‚’ä¿®æ£ã—ã¾ã—ãŸã€‚http://twitter.com/jbking/status/464659353945911297 Intro Go ã®ã‚¹ãƒ©ã‚¤ã‚¹ã¯ã€ã„ã‚ゆる LL ç³»ã®è¨€èªžãŒæŒã¤å¯å¤‰é•·é…列ã®å®Ÿè£…ã¨ä¼¼ã¦ã„ã¾ã™ã€‚ よã£ã¦ LL ã®ã‚ˆã†ãªæ‰‹è»½ãªæ‰±ã„ã‚’ã™ã‚‹ã“ã¨ã‚‚ã§ãã¾ã™ãŒã€ãã®å†…部実装を知るã“ã¨ã§ã‚ˆã‚ŠåŠ¹çŽ‡ã®è‰¯ã„メモリãƒãƒ³ãƒ‰ãƒªãƒ³ã‚°ãŒã§ãã€ãƒ‘フォーマンスを改善やã€ãƒ¡ãƒ¢ãƒªãƒ¼ãƒªãƒ¼ã‚¯ã®é˜²æ¢ãªã©ã«ç¹‹ãŒã‚‹å¯èƒ½æ€§ãŒã‚ã‚Šã¾ã™ã€‚ ã“ã®è¾ºã¯ SWrap ã¨ã„ã†ãƒ©ã‚¤ãƒ–ラリを作りãªãŒã‚‰å‹‰å¼·ã—ãŸã®ã§ã€ä»Šå›žã¯ã€ã“ã® Go ã®ã‚¹ãƒ©ã‚¤ã‚¹ã®å†…部実装を解説ã—ã¾ã™ã€‚ Go ã®é…列 スライスを知るãŸã‚ã«ã¯ã€ã¾ãšé…列ã«ã¤ã„ã¦çŸ¥ã£ã¦ãŠãå¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ Go ã®é…列ã¯å›ºå®šé•·ã®ãŸã‚ã€ä»¥ä¸‹ã®ã‚ˆã†ã«é•·ã•ã‚’指定ã—ã¦å®£è¨€ã—ã¾ã™ã€‚ var arr [4]int func main() { arr =
Big Sky :: golang ã®é…ã„コードをãŸã£ãŸ1è¡Œã§é«˜é€ŸåŒ–ã™ã‚‹ãƒ†ã‚¯ãƒ‹ãƒƒã‚¯
記事ä¸ã«é–“é•ã„ãŒã‚ã‚Šã¾ã—ãŸã€‚æ•°å€ã‚‚速ãã¯ãªã‚Šã¾ã›ã‚“ã§ã—ãŸã€‚確㋠1.0X ～ 1.1 å€ç¨‹åº¦ã®é«˜é€ŸåŒ–ã¯å¾—られã¾ã—ãŸãŒã³ã£ãã‚Šã™ã‚‹ã»ã©ã®ç‰©ã§ã¯ã‚ã‚Šã¾ã›ã‚“ã§ã—ãŸã€‚ã™ã¿ã¾ã›ã‚“。 ãã‚ãã‚ Go1.7 ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã‚‹ãã†ã§ã™ãŒã€çš†ã•ã‚“如何ãŠéŽã”ã—ã§ã™ã‹ã€‚Go 界隈ã®æ³¢å¹³ã“㨠mattn ã§ã™ã“ã‚“ã«ã¡ã‚。ﾊﾞｶﾓｰ(ç•¥ Go1.7 ã§ã¯ã‚³ãƒ³ãƒ‘イラã®æœ€é©åŒ–ãŒè¡Œã‚ã‚Œã€ãƒ“ルド速度ãŒã‹ãªã‚ŠçŸç¸®ã•ã‚Œã‚‹æ§˜ã«ãªã‚Šã¾ã—ãŸã€‚毎日ビルドã—ã¦ã‚‹åƒ•ã¨ã—ã¦ã¯éžå¸¸ã«å¬‰ã—ã„機能改善ã§ã™ã。 ã•ã¦ã¨ã¦ã‚‚ã‚ャッãƒâ€•ãªã‚¿ã‚¤ãƒˆãƒ«ã§é‡£ã£ã¦ã—ã¾ã£ãŸè¨³ã§ã™ãŒã€æ°—ã«ã—ãŸã‚‰è² ã‘ãªã®ã§ã©ã‚“ã©ã‚“話を進ã‚ã¾ã™ã€‚ var t [256]byte func f(b *[16]byte) { for i, v := range b { b[i] = t[v] } } 例ãˆã°ã“ã®ã‚³ãƒ¼ãƒ‰ã‚’見ã¦ä¸‹ã•ã„。ã“ã®ã‚³ãƒ¼ãƒ‰ã¯ã‚³ã‚³ã‹ã‚‰æ‹å€Ÿã—ã¾ã—ãŸã€‚issue ã®å†…容ã¯ã‚¹ã‚³ãƒ¼
Goã®ã‚¢ãƒ³ãƒãƒ‘ターン
Go書ã„ã¦ã¦ãªã‚“ã¨ãªã見ãˆã¦ã㟠Goã§ã‚„ã£ã¡ã‚ƒã„ã‘ãªã„パターン WAFå°Žå…¥ã—ã¦ã‚‰ãらãWebアプリ WAF自体ãŒç¾åœ¨ç¾¤é›„å‰²æ‹ çŠ¶æ…‹ã€‚ WAF毎ã«ãƒãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ãŒé•ã†ã®ã§æ—¢å˜ã‚³ãƒ¼ãƒ‰ã¤ãªãã«ã¯ãƒ©ãƒƒãƒ‘ーãŒå¿…è¦ã€‚ ã©ã®WAFã‚‚LL言語ã«æ¯”ã¹ã‚‹ã¨ã¾ã ã¾ã フィーãƒãƒ£ãƒ¼ã®ç¶²ç¾…範囲ãŒç‹ã„。 ãªã®ã§ã‚‚ã¡ã‚ã‚“LL言語ã»ã©æ¥½ã«ã¯æ›¸ã‘ãªã„ã“ã¨ãŒå¤šã„。 リフレクション使ã„ã¾ãã‚Šã§ãƒˆãƒ¼ã‚¿ãƒ«æ€§èƒ½ã¯LL言語並ã¿ã«é…ã„ã®ã‚‚ã‚る。 Go1.7ã®contextパッケージã®å°Žå…¥ã§æ¨™æº–ã®HTTPãƒãƒ³ãƒ‰ãƒ©ãŒå¾©æ¨©ã™ã‚‹å¯èƒ½æ€§ãŒã‚ã‚Šæ›´ã«è’れる予想。 追記: 楽ã§ãã‚‹ã®ã‚’期待ã—ã¦WAFã‚’å°Žå…¥ã™ã‚‹ã®ã€Œã‚„ã£ã¡ã‚ƒã„ã‘ãªã„ã€ã¨ã¾ã§ã¯è¨€ã„éŽãŽã ã£ãŸã‹ã‚‚ã—ã‚Œãªã„ã‘ã‚Œã©ä¾‹ã®sqlã§Prepareã‚’æ£ã—ã使ãˆã¦ã„ãªã„ã§æ€§èƒ½å‡ºãªã‹ã£ãŸä»¶ã¨ã‹ã€å½“é¢WAFを使ã†ãªã‚‰è‡ªåˆ†ã§æ¦‚ãä¸èº«ã‚’ç†è§£ã—ã¦ä½¿ã†è¦šæ‚ŸãŒå¿…è¦ã€‚ æ§‹é€ ä½“ãƒ¡ã‚½ãƒƒãƒ‰ã«ãƒã‚¸ãƒƒã‚¯ã‚’è©°ã‚込む Goã®æ€æƒ³
マイクãƒã‚µãƒ¼ãƒ“スã¨DDDã‚’Go言語ã¨Scala+Akkaã§æ¯”較ã—ãŸã‚‰EventSourcingã®è©±ã«ã‚‚ãªã£ã¦é¢ç™½ã‹ã£ãŸã¾ã¨ã‚ - yoskhdia’s diary
Reactive Messaging Patternsèªæ›¸ä¼šã®ãªã‹ã§ã€ã€Œãƒžã‚¤ã‚¯ãƒã‚µãƒ¼ãƒ“スã¨Akkaã¨Goã€ãªé¢ç™½ã„話題ãŒå‡ºãŸã®ã§ä»£è¡¨ã§ã¾ã¨ã‚る試ã¿ã‚¨ãƒ³ãƒˆãƒªã§ã™ã€‚（çµæ§‹ã€è‰²ã€…ãªè©±é¡Œã«é£›ã‚“ã§ã„ã‚‹ã®ã§é›£åº¦é«˜ã„。） ã¾ã¨ã‚æ–¹ã¨ã—ã¦ã¯ã€ä¼šè©±ãƒã‚°ã‚’転記ã—ã¦ã€æœ€å¾Œã«ã¾ã¨ã‚る形をã¨ã£ã¦ã„ã¾ã™ã€‚ã¾ãŸã€è°è«–ã¨ç§ã®è€ƒãˆãŒæ··ã–らãªã„よã†ã«æ‰€æ„Ÿã¯åˆ†ã‘ã¦ãŠãã¾ã™ã€‚ ddd-cqrs-es.connpass.com TL;DR è¦ç´ 技術（ã©ã‚“ãªè¨€èªžä½¿ã†ã¨ã‹ã€ã©ã‚“ãªã‚¢ãƒ¼ã‚テクãƒãƒ£ã«ã™ã‚‹ã¨ã‹ï¼‰ã®å‰ã«ã€çµ„織やプãƒãƒ€ã‚¯ãƒˆã®æ€§æ ¼ã‚’考ãˆã¦æˆ¦ç•¥ã‚’決ã‚ã¾ã—ょã†ã€‚ ãã—ã¦ã€ãã®ä¸ã§æœ€é©ã¨æ€ã‚れる戦術をã¨ã‚Œã‚‹ã‚ˆã†ãªè¦ç´ 技術を採用ã—ã¾ã—ょã†ã€‚ Akka良ã„よ。 ãƒã‚°ï¼ˆä¸€éƒ¨æŠœç²‹ï¼‰ Slackã‹ã‚‰ã®å¼•ç”¨ã®ãŸã‚テã‚ストベースã§ã™ã€‚ 事ã®å§‹ã¾ã‚Šã¯ã€è’木ã•ã‚“（以下〠@applideveloper ）ã®ç™ºè¨€ã§ã—ãŸã€‚ （ã“ã®è¨˜äº‹çµ¡ã¿ã§ã™ã。 集åˆçŸ¥ã§å„
『サイãƒãƒ¼ã‚¨ãƒ¼ã‚¸ã‚§ãƒ³ãƒˆã‚°ãƒ«ãƒ¼ãƒ— Go勉強会ã€
ã¿ãªã•ã‚“ã“ã‚“ã«ã¡ã¯ï¼ã€€ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒ–ãƒã‚°é‹å–¶ãƒãƒ¼ãƒ ã®æ¿æ•·ã§ã™ã€‚ 今回ã¯ã€å…ˆæ—¥ç¤¾å†…ã§è¡Œã‚ã‚ŒãŸGo勉強会ã«ã¤ã„ã¦ç´¹ä»‹ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ 今回ã®å‹‰å¼·ä¼šã§ã¯ã€ã‚µã‚¤ãƒãƒ¼ã‚¨ãƒ¼ã‚¸ã‚§ãƒ³ãƒˆã‚°ãƒ«ãƒ¼ãƒ—ã®å„社ã‹ã‚‰ç™ºè¡¨ãŒã‚ã‚Šã¾ã—ãŸã€‚ 勉強会ãƒã‚¹ã‚¿ãƒ¼ã€‚事å‰äºˆç´„ä¸è¦ï¼ Golangã®æ³¨ç›®åº¦ã¯é«˜ãã€é–‹å§‹å³æº€å“¡å¾¡ç¤¼ã§ã—ãŸã€‚(若手ä¸å¿ƒã«ç«‹ã¡è¦‹ã‚‚ï½— ãã‚Œã§ã¯ç™ºè¡¨å†…容を紹介ã—ãŸã„ã¨æ€ã„ã¾ã™ã€‚ ※勉強会資料ã¯ç¤¾å†…æƒ…å ±ãŒå«ã¾ã‚Œã¦ã„ã‚‹ãŸã‚全公開ã¯ã§ãã¾ã›ã‚“ãŒã€ 勉強会ã®é›°å›²æ°—ã ã‘ã§ã‚‚æ„Ÿã˜å–ã£ã¦ã„ãŸã ã‘ã‚‹ã¨å¹¸ã„ã§ã™ã€‚ 「Goトラップ ～ä¸ç´šè€…å‘ã‘Go言語ã§ã‚ˆã引ã£ã‹ã‹ã‚‹åŒæœŸå‡¦ç†ãªã©å‘¨ã‚Šã®å•é¡Œã€åˆ†æžã¨è§£æ±ºæ–¹æ³•ï½žã€ 技術本部 基盤システムG マリオã•ã‚“ã®ç™ºè¡¨ã§ã™ã€‚ ※発表資料 https://github.com/imkira/gostudy 後述ã—ã¾ã™ã¨ãŠã‚Šã€ã“ã®ä»–ã®ç™ºè¡¨å†…容ã¯ã€Œã‚µãƒ¼ãƒ“スã®ä¸ã§Goã‚’ã©ã®ã‚ˆã†ã«ä½¿ã£ã¦ã„ã‚‹ã‹ã€ã‹è©±é¡Œã®ä¸å¿ƒã§ã—ãŸ
Go入門
1. Go入門 ver. 2017/04 The Go gopher was designed by Renee French. The gopher stickers was made by Takuya Ueda. Licensed under the Creative Commons 3.0 Attributions license. 2. アジェンダ ■自己紹介 â– Goã®ç´¹ä»‹ â– Goã®åŸºæœ¬ ■型・メソッド・インタフェース ■ゴールーãƒãƒ³ãƒ»ãƒãƒ£ãƒãƒ« â– ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° â– go test 㨠testingパッケージ â– ãƒãƒ³ã‚ºã‚ªãƒ³ 2
GitHub - ToQoz/gopwt: PowerAssert library for golang
package main import ( "database/sql" "flag" "fmt" "os" "reflect" "sync" "testing" "github.com/ToQoz/gopwt" "github.com/ToQoz/gopwt/assert" ) func TestMain(m *testing.M) { flag.Parse() gopwt.Empower() // magic happens os.Exit(m.Run()) } func TestWithMessage(t *testing.T) { var receiver *struct{} receiver = nil assert.OK(t, receiver != nil, "receiver should not be nil") } func TestWithTestingRun(t *
What's in a name?
What's in a name? October 2014 Andrew Gerrand Google Inc. Names matter Readability is the defining quality of good code. Good names are critical to readability. This talk is about naming in Go. 2 Good names A good name is: Consistent (easy to guess), Short (easy to type), Accurate (easy to understand). 3 A rule of thumb The greater the distance between a name's declaration and its uses, the longer
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å•é¡Œ length := len(users) var names [length]string ã¨ã‹ã—ãŸã„ã‘ã© invalid array bound length ã¨å±ã‚‰ã‚Œã‚‹ 解決 é…列ã«ã¯constantã—ã‹æ¸¡ã›ãªã„。å¯å¤‰é•·é…列ã«ã¯ã‚¹ãƒ©ã‚¤ã‚¹ã‚’使ㆠGoogle グループ Go言語ã®ã‚¹ãƒ©ã‚¤ã‚¹ã‚’ç†è§£ã—よㆠlength := len(users) names := make([]string, length) ãªã„ã—ã€å˜ã« var names []string for _, user := range users { names = append(names, user.Name()) } // é…ãㆠDRYãªå‚™å¿˜éŒ²
Gocon Spring 2016
Good morning! Thank you for coming to my talk. Before I begin, I want to express my gratitude to tenntenn and the organisers of GoCon for inviting me to speak today. I also want to acknowledge the generous sponsorship of our hosts, Cyber Agent, for providing the venue for today. [ to audience ] would someone be kind enough to read this for me ? Do you know the english translation? A frog in a well
Writing High Performance Go
Writing High Performance Go GopherChina 17 April 2016 Dave Cheney Welcome 您好! Thank you for coming to my talk. Thank you also to the GopherChina organisers for inviting me to speak. My name is David. I'm a Go programmer from Sydney, Australia. I'm a contributor to the Go project and I run the Sydney Go Users' group. 2 Agenda This talk is aimed at development teams who are building production Go ap
Go 言語ã«é–¢ã™ã‚‹ãƒ–ックマーク - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? 本æ¥ãŒå¿™ã—ã㦠Go 言語をã‹ã¾ã£ã¦ã‚ã’る暇ãŒãªã„ã®ã ãŒï¼Œãƒ–ックマークã°ã£ã‹ã‚Šæºœã¾ã£ã¦ã„ãã®ã§ï¼Œå®šæœŸçš„ã«åã出ã—ã¦ãŠã。ãªãŠï¼Œ Qiita ã§ã®ãƒ¡ãƒ³ãƒ†ãƒŠãƒ³ã‚¹ã¯çµ‚了ã™ã‚‹ã“ã¨ã«ã—ãŸã€‚以é™ã¯ä»¥ä¸‹ã®ãƒšãƒ¼ã‚¸ã§ãƒ¡ãƒ³ãƒ†ãƒŠãƒ³ã‚¹ã—ã¦ã„る。 Go 言語ã«é–¢ã™ã‚‹ãƒ–ックマーク - プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªž Go | text.Baldanders.info å…¬å¼ã‚µã‚¤ãƒˆ The Go Programming Language : 2017å¹´1月26日時点ã§ã®æœ€æ–°ã¯ 1.7.6 git repositories (Google) git repositories (Gi
Syntax
Regular expressions are a notation for describing sets of character strings. When a particular string is in the set described by a regular expression, we often say that the regular expression matches the string. The simplest regular expression is a single literal character. Except for the metacharacters like *+?()|, characters match themselves. To match a metacharacter, escape it with a backslash:
Go言語ãŒãƒ€ãƒ¡ãªç†ç”± | POSTD
ç§ã¯Go言語ãŒæ°—ã«å…¥ã£ã¦ã„ã¾ã™ã—ã€å¤šãã®å ´é¢ã§ä½¿ç”¨ã—ã¾ã™ã€‚ç¾ã«ã“ã®ãƒ–ãƒã‚°ã‚‚Goã§æ›¸ã„ã¦ã„ã¾ã™ã€‚Goã¯ä¾¿åˆ©ãªè¨€èªžã§ã™ãŒã€å„ªã‚ŒãŸè¨€èªžã¨ã¯è¨€ãˆã¾ã›ã‚“。ã¤ã¾ã‚Šã€æ‚ªãã¯ãªã„ã‘ã‚Œã©ã€å分ã§ã¯ãªã„ã¨ã„ã†ã“ã¨ã§ã™ã€‚ 満足ã§ããªã„言語を使用ã™ã‚‹éš›ã¯æ³¨æ„ãŒå¿…è¦ã§ã™ã€‚注æ„ã‚’æ€ ã‚‹ã¨ã€ãã®è¨€èªžã‚’次ã®20年間使ã„続ã‘る羽目ã«ãªã‚‹ã‹ã‚‚ã—ã‚Œãªã„ã‹ã‚‰ã§ã™ã€‚ ç§ã®Goã«å¯¾ã™ã‚‹ä¸»ãªä¸æº€ã‚’本文ã«ã¾ã¨ã‚ã¾ã—ãŸã€‚æ—¢ã«ä½•åº¦ã‚‚指摘ã•ã‚Œã¦ã„ã‚‹ã“ã¨ã‚‚å«ã¾ã‚Œã¦ã„ã¾ã™ãŒã€ä¸ã«ã¯ã“ã‚Œã¾ã§ã»ã¨ã‚“ã©è©±é¡Œã«ãªã£ã¦ã„ãªã„指摘もã‚ã‚Šã¾ã™ã€‚ ã“ã‚Œã‹ã‚‰åˆ—挙ã™ã‚‹å…¨ã¦ã®èª²é¡Œã«ã¯æ—¢ã«è§£æ±ºç–ãŒã‚ã‚‹ã“ã¨ã‚’示ã™ãŸã‚ã€ç§ãŒå„ªè‰¯ãªè¨€èªžã¨è€ƒãˆã‚‹Rustã‚„Haskellã¨æ¯”較ã—ã¦èª¬æ˜Žã—ã¾ã™ã€‚ 汎用プãƒã‚°ãƒ©ãƒŸãƒ³ã‚° 課題 誰ã§ã‚‚ã•ã¾ã–ã¾ãªäº‹æŸ„ã«å¹…広ã対応ã§ãるコードを記述ã—ãŸã„ã¨è€ƒãˆã¾ã™ã€‚例ãˆã°æ•°ã®ãƒªã‚¹ãƒˆã®åˆè¨ˆã‚’求ã‚ã‚‹ãŸã‚ã«å®šç¾©ã—ãŸé–¢æ•°ãŒã€å°æ•°ã€æ•´æ•°ã€ã¾ãŸãã®ä»–ã®åˆè¨ˆã‚’求ã‚られるもã®
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