ãªã‚“ã§ã¿ã‚“ãªRunJS使ã‚ãªã„ã®ã‹ã‚ã‹ã‚‰ãªã„ - Qiita
※タイトルã¯ç…½ã‚Šã§ã™ã€‚ TL;DR RunJSã¯æ‰‹å…ƒã§æ‰‹è»½ã«JSã®æŒ™å‹•ã‚’試ã›ã‚‹ã‚¢ãƒ—リ ã‚ã¡ã‚ƒãã¡ã‚ƒä¾¿åˆ©ã¨æ€ã†ã®ã«ç´¹ä»‹è¨˜äº‹ã‚‚ã‚ã‚“ã¾ãªã„ 使ã£ãŸã‚‰æ—ã‚‹ã‹ã‚‰ã©ã†ãž RunJS Qiitaã§ã‚‚紹介記事見ã‹ã‘ãªã„ã—ã€Googleã§æ¤œç´¢ã‹ã‘ã¦ã‚‚（少ãªãã¨ã‚‚日本語ã®è¨˜äº‹ã¯ï¼‰è¦‹å½“ãŸã‚‰ãªã‹ã£ãŸã®ã§æ›¸ã。 使ã£ãŸã‚‰æ—ã‚‹ã®ã«ãªãƒ¼ã€ã¨ã„ã†ãŠæ°—æŒã¡ã§ã™ã€‚ RunJS is 何？ ç°¡å˜ã«è¨€ã†ã¨ã€JavaScriptã®ã‚µãƒ³ãƒ‰ãƒœãƒƒã‚¯ã‚¹ï¼ˆPlayGround？）。 自分ã®å ´åˆã€ã“ã‚Œã¾ã§ã•ãã£ã¨ã‚³ãƒ¼ãƒ‰è©¦ã—ãŸã„ã¨ãã¯ã€Chromeã®devtoolã§ã‚³ãƒ³ã‚½ãƒ¼ãƒ«ã«æ›¸ãã¨ã‹nodeã®REPL使ã†ã‹ã ã£ãŸã‚“ã§ã™ãŒã€devtoolã¯ãƒ–ラウザ開ã„ã¦ã€devtoolé–‹ã„ã¦ã€ã—ã‹ã‚‚ã‚ã¾ã‚Šæ›¸ãã‚„ã™ã„ã¨ã¯è¨€ãˆãšãƒ»ãƒ»ãƒ»ã€ã ã—ã€nodeã®REPLã¯å˜è¡Œã¨ã‹ãªã‚‰ã„ã„ã‘ã©ã€è¤‡æ•°è¡Œã«æ¸¡ã‚‹ã¨è¾›ã•ã—ã‹ãªã„ã§ã™ã—・・・。 ãã“ã§ãŠå…„ã•ã‚“。 RunJSã§ã™ã‚ˆã€‚ ã¨
TypeScriptã€åƒ•ãŒæ‚ªã‹ã£ãŸã€ã‚´ãƒ¡ãƒ³ï¼š nullã‚„undefinedã®æ‰±ã„ã¯ãƒžãƒˆãƒ¢ã ã£ãŸ - 檜山æ£å¹¸ã®ã‚マイラ飼育記 (ã¯ã¦ãªBlog)
TypeScriptã€ãŠå‰ã‚‚ã‹ï¼š nullã‚„undefinedã®æ‰±ã„ãŒã‚¤ã‚¤ã‚«ã‚²ãƒ³éŽãŽ ã”ã‚ã‚“ãªã•ã„。↑ã®è¨˜äº‹ã€åƒ•ãŒã†ã‹ã¤ãªäº‹ã‚’書ãã¾ã—ãŸã€‚TypeScriptã®ã‚³ãƒ³ãƒ‘イラã«ã‚ªãƒ—ションを付ã‘ã‚Œã°ã€nullã¨undefinedã«é–¢ã—ã¦ã‚ãƒãƒ³ã¨ãƒã‚§ãƒƒã‚¯ã—ã¾ã™ã€‚ ãã³ã—ã„ãƒã‚§ãƒƒã‚¯ã‚’ã™ã‚‹ã‚ªãƒ—ション付ããªã‚‰ã€nullåž‹ã‚‚undefined型もシングルトン型ã«ãªã‚Šã¾ã™ã€‚ åž‹ デフォルトã§ã®å€¤ã®é›†åˆ ãã³ã—ããƒã‚§ãƒƒã‚¯ã—ãŸã¨ãã®å€¤ã®é›†åˆ null {null, undefined} {null} undefined {null, undefined} {undefined} void {null, undefined} {undefined} 事ã®ç™ºç«¯ã¨é¡›æœ« TypeScriptã®åˆ—挙型ã®æŒ™å‹•ã‚’知りãŸãã¦ã€enum OnlyOne {ONE} ã®ã‚µãƒ³ãƒ—ルを書ã„ã¦è©¦ã—ãŸã‚‰ã€nullãŒå…¥ã£ã¦ã„ã¦é©šã„ãŸã€ã¨ã„ã†ã®
Async/await
There’s a special syntax to work with promises in a more comfortable fashion, called “async/awaitâ€. It’s surprisingly easy to understand and use. Async functionsLet’s start with the async keyword. It can be placed before a function, like this: The word “async†before a function means one simple thing: a function always returns a promise. Other values are wrapped in a resolved promise automatically
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The articles listed in Prerequisite Concepts#Immutable Data Management give a number of good examples for how to perform basic update operations immutably, such as updating a field in an object or adding an item to the end of an array. However, reducers will often need to use those basic operations in combination to perform more complicated tasks. Here are some examples for some of the more common
Symbolã«ã¤ã„㦠- JS.next
æ¦‚è¦ ES2015ã§ã¯Undefinedã€Nullã€Booleanã€Numberã€Stringã€Objectã®ï¼–ã¤ã®åž‹ã«åŠ ãˆã¦ã€æ–°ã—ã„åž‹SymbolãŒå°Žå…¥ã•ã‚ŒãŸã€‚ シンボルã¯ãƒ—リミティブ型ã§ã€æ–‡å—列ã®ã‚ˆã†ã«ãƒ—ãƒãƒ‘ティã®ã‚ーã¨ã—ã¦ä½¿ãˆã‚‹ç‰¹å¾´ã‚’æŒã¤ã€‚ 振る舞ㄠシンボルã¯Symbolコンストラクタを呼ã¶ã“ã¨ã§ä½œã‚‰ã‚Œã€ãã®æ™‚ã«å¼•æ•°ã¨ã—ã¦æ–‡å—列を渡ã›ã°åå‰ã‚’æŒãŸã›ã‚‹ã“ã¨ãŒã§ãる。 sym1 = Symbol() sym2 = Symbol('name') typeof演算åã§è©•ä¾¡ã™ã‚‹ã¨"symbol"ãŒè¿”ã•ã‚Œã‚‹ã€‚ typeof sym1 // "symbol" Symbolコンストラクタをnew付ãã§å‘¼ã³å‡ºã™ã“ã¨ã¯å‡ºæ¥ãªã„ãŒã€ã‚·ãƒ³ãƒœãƒ«ã‚’Objectコンストラクタã«æ¸¡ã™ã“ã¨ã§ãƒ©ãƒƒãƒ—ã™ã‚‹ã“ã¨ã¯ã§ãる。 new Symbol() // TypeError symobj = Object(sym2) ty
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This document was originally taken from Luke Hoban's excellent es6features repo. Go give it a star on GitHub! Introduction​ ECMAScript 2015 is an ECMAScript standard that was ratified in June 2015. ES2015 is a significant update to the language, and the first major update to the language since ES5 was standardized in 2009. Implementation of these features in major JavaScript engines is underway no
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ã“ã®ã‚¨ãƒ³ãƒˆãƒªãƒ¼ã¯HTML5 Advent Calendar 2012ã®4日目ã®ã‚¨ãƒ³ãƒˆãƒªãƒ¼ã«ãªã‚Šã¾ã™ã€‚ JSON　RPCã¨ã¯æ–‡å—通りJSONã§RPCã™ã‚‹ãƒ—ãƒãƒˆã‚³ãƒ«ã§ã€ç¾è¡Œãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯2.0ã§ã™ã€‚ リモート環境ã«ã‚る関数をãƒãƒ¼ã‚«ãƒ«ã®é–¢æ•°ã¨åŒæ§˜ã«å‘¼ã³å‡ºã›ã‚‹RPCã¯å‘¼ã³ã ã™æ©Ÿèƒ½ãŒå¤šã‹ã£ãŸã‚Šã€è¤‡é›‘ã ã£ãŸã‚Šã™ã‚‹æ™‚ã«éžå¸¸ã«ä¾¿åˆ©ã§ã™ã€‚ã¾ãŸRESTã¨é•ã„対象ãŒHTTPã‚’å—ã‘付ã‘るサーãƒãƒ¼ã§ã‚ã‚‹å¿…è¦ãŒãªã„ã¨ã„ã†ãƒ¡ãƒªãƒƒãƒˆãŒã‚ã‚Šã€ã“ã‚ŒãŒwebsocketやメッセージングAPIã€webworkerã¨ã„ã£ãŸHTML5 APIã¨éžå¸¸ã«ç›¸æ€§ãŒã„ã„ã®ã§ã™ã€‚ ã¾ãŸRPCã¨ã„ã†ã¨XML RPCãŒæœ‰åã§ã™ãŒã€JSON RPCã¯ãã‚Œã«ãらã¹ã¦ä»¥ä¸‹ã®ã‚ˆã†ãªç‰¹å¾´ã‚’æŒã¡ã¾ã™ プãƒãƒˆã‚³ãƒ«ãŒè»½é‡ãƒ»ã‚·ãƒ³ãƒ—ル åå‰ã¤ãパラメーター(namedparameter) ãƒãƒƒãƒãƒªã‚¯ã‚¨ã‚¹ãƒˆ ã§ã¯é †ç•ªã«è¦‹ã¦ã„ãã¾ã™ プãƒãƒˆã‚³ãƒ«ãŒè»½é‡ RPCã«é™ã‚‰ãšXMLã¨
Node.js — ECMAScript 2015 (ES6) and beyond
How much JavaScript do you need to know to use Node.js?
JavaScriptã®æ–‡åŒ–ã¨leftpadã®è©±ã¨padStartã«ã¤ã„㦠- from scratch
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ECMAScript Language Specification - ECMA-262 Edition 5.1
Standard ECMA-262 5.1 Edition / June 2011 ECMAScript® Language Specification This is the HTML rendering of Ecma-262 Edition 5.1, The ECMAScript Language Specification. The PDF rendering of this document is located at https://ecma-international.org/wp-content/uploads/ECMA-262_5.1_edition_june_2011.pdf. The PDF version is the definitive specification. Any discrepancies between this HTML version and
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React Native æ¦‚è¦ React.js ã¨ã ã„ãŸã„åŒã˜ä½œæ³•ã§ã€JavaScript ã§æ›¸ã„ãŸã‚³ãƒ¼ãƒ‰ãŒ iOS ãƒã‚¤ãƒ†ã‚£ãƒ–アプリã¨ã—ã¦ä¸€å¿œå‹•ã。ãã®ãƒ•ãƒ¬ãƒ¼ãƒ ワークã¨é–‹ç™ºç’°å¢ƒã‚’æä¾›ã™ã‚‹ã€‚ React.js ã¨åŒã˜ React を謳ã£ã¦ã„ã‚‹ã¨ãŠã‚Šã€JSX 㧠UI コンãƒãƒ¼ãƒãƒ³ãƒˆã‚’定義ã™ã‚‹ã¨ã‹ã€Props ã‚„ State 㧠View ã®ãƒ‡ãƒ¼ã‚¿ãƒ•ãƒãƒ¼ã‚’æ•´ãˆã‚‹ã¨ã‹ã€setState() ã«ã‚ˆã‚‹ãƒ‡ãƒ¼ã‚¿ãƒã‚¤ãƒ³ãƒ‡ã‚£ãƒ³ã‚°ã¨ã‹ã€è«¸ã€…ãŒä¸€ç·’。従ã£ã¦ React.js ã§ã‚¢ãƒ—リケーションを作ã£ãŸã“ã¨ãŒã‚ã‚Œã°ã€å¦ç¿’コストをã»ã¨ã‚“ã©ã‹ã‘ãšã«ã‚¢ãƒ—リãŒä½œã‚Œã‚‹ï½¥ï½¥ï½¥ã‹ã‚‚ 例ãˆã°ä»¥ä¸‹ã®ã‚ˆã†ã«ã€å…¥åŠ›å€¤ã‚’ãã®ã¾ã¾ç”»é¢ã«ã‚¨ã‚³ãƒ¼ã™ã‚‹ã‚¢ãƒ—リケーション。 ã“ã‚Œã¯ã“ã‚“ãªæ„Ÿã˜ã®ã‚³ãƒ¼ãƒ‰ã«ãªã‚‹ã€‚ var React = require('react-native'); var { AppRegistry, StyleSheet, T
Node.js Best Practices - RisingStack Engineering
We get asked about Node.js best practices, tips all the time – so this post intends to clean things up, and summarizes the basics of how we write Node.jsNode.js is an asynchronous event-driven JavaScript runtime and is the most effective when building scalable network applications. Node.js is free of locks, so there's no chance to dead-lock any process. at RisingStack. Some of these Node.js best p
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LL Diver発表資料ã§ã‚ã‚‹ã€ãã‚Œã§ã‚‚Node.jsをやる話。
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Setting up a typescript project in 2021
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GitHub - airbnb/javascript: JavaScript Style Guide
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