Fast and precise type checking for JavaScript | the morning paper
the morning paper a random walk through Computer Science research, by Adrian Colyer Made delightfully fast by strattic Fast and precise type checking for JavaScript Chaudhuri et al., OOPSLA’17 In this paper we present the design and implementation of Flow, a fast and precise type checker for JavaScript that is used by thousands of developers on millions of lines of code at Facebook every day. In a
flowtypeã®declareã¨importã®è©± - Qiita
flowtypeã®å°Žå…¥ã‚’æ–念ã—ã¾ã—ãŸã€‚ã¨ã¯ã„ãˆæ•°é€±é–“ã»ã©ã‚„ã£ã¦çŸ¥è¦‹ãŒæºœã¾ã£ãŸã®ã§ã€ãれをメモãŒã¦ã‚‰æ®‹ã—ã¦ãŠãã¾ã™ã€‚ å‰æ å‰æã¨ã—ã¦Flow Commentsã§ä½¿ç”¨ã—ã¦ã„ã¾ã™ã€‚ Flow Comments ã“ã‚Œã¯è‰¯ã„ã‹æ‚ªã„ã‹ã•ã¦ãŠãã€å®Ÿè£…ã¨ã—ã¦ã®ã‚³ãƒ¼ãƒ‰ã¨ã€åž‹ã‚’補完ã™ã‚‹ã‚³ãƒ¼ãƒ‰ã‚’分ã‘ã‚‹ã“ã¨ãŒã§ãã‚‹ã®ã§ã€èžé€šãŒåˆ©ãã¨ã„ã†ã®ã§Flow Commentsを使用ã—ã¦ã„ã¾ã™ã€‚ã¤ã¾ã‚Šã¯ã“ã†ã„ã†ã“ã¨ã§ã™ã€‚ var awslambda/*: Lambda */ = new AWS.Lambda(); var lambda = Bluebird.promisifyAll(lambda, {suffix: 'Promise'}); /*:: lambda = {}; lambda.addPermissionPromise = Bluebird.promisify(awslambda.addPermission);
flowtypeã«ã‚ˆã‚ŠFluxã«ãŠã„ã¦åž‹å®‰å…¨ã‚’手ã«å…¥ã‚Œã‚‹ - Qiita
ã“ã®è¨˜äº‹ã¯freee Engineers Advent Calendar 2016ã®5日目ã§ã™ã€‚ ã“ã‚“ã«ã¡ã¯ã€freeeã®ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã® @joe-re ã§ã™ã€‚ 僕ã‹ã‚‰ã¯flowtypeã«ã‚ˆã‚‹ã€Fluxアーã‚テクãƒãƒ£ã¸ã®åž‹ã‚·ã‚¹ãƒ†ãƒ ã®å°Žå…¥ã«ã¤ã„ã¦ãŠè©±ã—ã•ã›ã¦ã„ãŸã ãã¾ã™ã€‚ 背景 Reactã«ã‚ˆã‚‹ã‚³ãƒ³ãƒãƒ¼ãƒãƒ³ãƒˆæŒ‡å‘è¨è¨ˆã€Fluxã«ã‚ˆã‚‹å˜æ–¹å‘フãƒãƒ¼ã«ã‚ˆã£ã¦ã€åƒ•ãŸã¡ã¯éšŽå±¤åŒ–ã•ã‚Œã™ãŽã¦ã„ã‚‹Viewã«ãŠã‘るイベントã®ç™ºè¡Œã¨è³¼èªã€ç…©é›‘ãªDOMæ“作ã¨çŠ¶æ…‹ç®¡ç†ã‹ã‚‰è§£æ”¾ã•ã‚Œã¾ã—ãŸã€‚ Fluxアーã‚テクãƒãƒ£ã«ãŠã„ã¦ã¯ã€Componentã€ActionCreatorã€StoreãŒãã‚Œãžã‚Œã®å±¤ã§å®Œå…¨ã«åˆ†é›¢ã•ã‚Œã¦ã„ã¾ã™ã€‚Storeã¯Componentã®å˜åœ¨ã‚’知らãªã„ã—ã€Componentã¯Storeã‚’è³¼èªã™ã‚‹ã ã‘ã§ä¸ã®ãƒã‚¸ãƒƒã‚¯ã¯ä¸€åˆ‡çŸ¥ã‚‰ãªã„ã—ã€ActionCreatorã¯ãŸã ã®é–¢æ•°ç¾¤ã§ã™ã€‚ ãƒãƒ¼ãƒ 開発ã®ä¸ã§ã“ã®é–¢ä¿‚性を
実践投入ã—ã¦ã‚ã‹ã£ãŸflowtypeã®ãƒ¡ãƒªãƒ‡ãƒ¡
facebook製ã®åž‹ãƒã‚§ãƒƒã‚«ã€flowを実践投入ã—ã¦ã¿ãŸçµæžœã€åˆ†ã‹ã£ãŸè‰¯ã•ã¨è¾›ã•ã‚’è©°ã‚è¾¼ã¿ã¾ã—ãŸã€‚
flowtypeã®Utility Typeã«ã¤ã„㦠ãã®1 - Qiita
flowtype v0.31.0ãŒã§ã¾ã—ãŸãï¼ï¼ˆæ—¢ã«v0.32.0ã‚‚ã§ã¦ã¾ã™ã‘ã©ï¼‰ CHANGELOGèªã‚“ã§ã¿ã‚‹ã¨ Added a new "magic" type called $PropertyType. This utility extracts the type of the property 'x' off of the type T. magic typeãªã‚‹æ°—ã«ãªã‚‹ç”¨èªžãŒã‚ã‚‹ã˜ã‚ƒã‚ã‚Šã¾ã›ã‚“ã‹ï¼ï¼ ã©ã†ã‚„ら$ã‹ã‚‰å§‹ã¾ã‚‹å®šç¾©æ¸ˆã¿ã®åž‹ã®ã“ã¨ã‚’指ã—ã¦ã‚‹ã‚ˆã†ãªã®ã§ã™ãŒã€å…¬å¼ã®ãƒ‰ã‚ュメントやéŽåŽ»ã®CHANGELOGを見ã¦ã‚‚ãã‚“ãªã‚‚ã®ã¯ä¸€åˆ‡å‡ºã¦ãã¾ã›ã‚“。 仕方ãªã„ã®ã§å®Ÿéš›ã«ã‚³ãƒ¼ãƒ‰ã‚’見ã¦ã¿ã‚‹ã¨ https://github.com/facebook/flow/blob/master/src/typing/type_annotation.ml type_annotation.mlã®ä¸ã«$ã‹ã‚‰å§‹
Flow Type Cheat Sheet - SaltyCrane
Flow is a static type checker for JavaScript. This is a list of Flow types generated from the source code in https://github.com/facebook/flow/tree/v0.111.3/ The script to generate this list is on github. Fixes welcome. See also my TypeScript cheat sheet, TypeScript React cheat sheet, and Docker cheat sheet. There are separate sections for "private" or "magic" types with a $ in the name. See the no
flowtypeã®å®Ÿç¾ã™ã‚‹å®Ÿè¡Œæ™‚例外ã®ãªã„世界 - Please Drive Faster
今日ã“ã‚“ãªã‚¹ãƒ©ã‚¤ãƒ‰ã‚’見ã‹ã‘ãŸã€‚ djcordhose.github.io ã“ã‚Œã¯typescriptã¨flowtypeã®é•ã„ãŒã‚ˆã分ã‹ã‚‹ã™ã”ã良ã„スライド。 ã“ã®ã‚¹ãƒ©ã‚¤ãƒ‰ã®5ページ目ã«ä»¥ä¸‹ã®1æ–‡ãŒã‚る。 FLOW SOUNDNESS, NO RUNTIME EXCEPTIONS AS GOAL スライドã«åˆºæ¿€ã‚’å—ã‘ãŸã®ã¨ã€æœ€è¿‘flowtypeを触ã£ã¦ã„ãŸã®ã‚‚ã‚ã£ã¦ã€ã“ã‚ŒãŒä½•ã‚’指ã—ã¦ã„ã‚‹ã‹æ›¸ããŸããªã£ãŸã€‚ 実行環境 flow: 0.26.0 typescript: 1.18.10 Flowtypeã®ãã»ã‚“ 以下ã®javasciptã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’flowã«ã‹ã‘ã¦ã¿ã‚‹ã€‚ function foo(x) { return x * 10; } foo('Hello, world!'); $ flow flow.js:5 5: foo('Hello, world!'); ^^^^^^^^^^^^^^^
Flow vs TypeScript
Type Systems for JavaScript Oliver Zeigermann / @DJCordhose http://djcordhose.github.io/flow-vs-typescript/2016_hhjs.html Most recent version including TypeScript 2.0 can be found here (might be work in progress): http://djcordhose.github.io/flow-vs-typescript/flow-typescript-2.html Part I: Introduction Why using type systems? IMHO type systems make code easier to maintain type annotations can mak
Writing Better JavaScript with Flow — SitePoint
Key Takeaways Flow is a static type checker for JavaScript created by Facebook, designed to find type errors in JavaScript code, often without requiring code modification. This results in the minimization of programmer effort. Flow’s type checking is opt-in, meaning you can select which files you want to check. This is done by adding @flow as a comment at the top of any JavaScript files you want t
Flow, a new static type checker for JavaScript
Today we’re excited to release an early version of Flow, a new open-source static type checker for JavaScript. Flow adds static typing to JavaScript to improve developer productivity and code quality. In particular, static typing offers benefits like early error checking, which helps you avoid certain kinds of runtime failures, and code intelligence, which aids code maintenance, navigation, transf
Flow | A static type checker for JavaScript
Code Faster.Tired of having to run your code to find bugs? Flow identifies problems as you code. Stop wasting your time guessing and checking. Code Smarter.It's hard to build smart tools for dynamic languages like JavaScript. Flow understands your code and makes its knowledge available, enabling other smart tools to be built on top of Flow. Code Confidently.Making major changes to large codebases
3分ã§åˆ†ã‹ã‚‹Facebook Flow - teppeis blog
ã¨ã„ã†ã‹3分ãらã„ã®æƒ…å ±ã—ã‹ã¾ã 出ã¦ãã¦ãªã„ã‚“ã ã‘ã©ã€‚ 先月ã®@Scale 2014ã§ç™ºè¡¨ã•ã‚ŒãŸFacebookã®Flowã«ã¤ã„ã¦ã€ãŠãらã唯一ã®ã‚ªãƒ•ã‚£ã‚·ãƒ£ãƒ«ãªæƒ…å ±ã§ã‚ã‚‹ã“ã®ç™ºè¡¨å‹•ç”»ã‚’見ã¦åˆ†ã‹ã£ãŸã“ã¨ã‚’紹介（ã–ã£ã¨è¦‹ãŸã ã‘ãªã®ã§é–“é•ã£ã¦ãŸã‚‰ã”ã‚ã‚“ãªã•ã„）。 JavaScript Testing and Static Type Systems at Scale - @Scale 2014 - Web é™çš„ãªåž‹ãƒã‚§ãƒƒã‚¯ãŒã§ãるトランスパイラ シンタックスã¯TypeScriptäº’æ› ãªã®ã§new languageã¨ã‹altjsã¨ã‹è¨€ã£ã¦ãªã„ Code Intelligent Server: コンパイラã¯ã‚µãƒ¼ãƒãƒ¼åž‹ モジュール毎ã«ã‚¤ãƒ³ã‚¯ãƒªãƒ¡ãƒ³ã‚¿ãƒ«ã«åž‹è§£æžã‚’アップデートã™ã‚‹ 高度ã«ä¸¦åˆ—化ã—ã¦ã„ã¦é«˜é€Ÿ クライアントツールã¯ã€ã‚³ãƒ³ãƒ‘イラサーãƒãƒ¼ã«åž‹æƒ…å ±ã®ã‚¯ã‚¨ãƒªã‚’投ã’ã‚‹ ES6ã®å„種シンタックスをサãƒãƒ¼ãƒˆ
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Flowtype Introduction
最近ã®Flowtype事情ã¨React+Flowtype連æº
facebook/flow 実践編 - Qiita
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