イテレータについて - JS.next
概要 V8でES2015のイテレーション周りの実装が進んできたので、解説してみようと思う。 イテレーションとは ここではデータの要素を繰り返して取り出すこと。 例えば配列のforEachメソッドは、要素やインデックスをイテレートするイテレータである。 ただしこれらは（内部的に）繰り返しまで行うイテレータ（内部イテレータ）だが、ES2015では外部イテレーションのための仕組みが入った。 イテレータオブジェクト イテレータオブジェクトは『次の要素』を返すメソッドを備えているオブジェクトである。 つまりイテレーションの『次の要素を取り出す』ことだけを担い、それを繰り返すことは外で行われる（外部イテレータ）。 例 Array.prototype.values()は配列の要素を順番に列挙するイテレータオブジェクトを返す。 var ary = [5, 4, 3] var iter = ary.valu
Practical Workflows for ES6 Modules
ES6 modules are set to become the future replacement for the AMD and CommonJS module formats. They are defined by the current ES6 Specification and will be implemented in JavaScript engines in the future in both the browser and the server. This article covers a variety of practical workflows for implementing ES6 modules. These approaches are very new, and there will still be edge cases, but these
blog/native_javascript_data_binding
Native JavaScript Data-Binding Two-way data-binding is such an important feature - align your JS models with your HTML view at all times, to reduce boilerplate coding and enhance UX. We will observe two ways of doing this using native JavaScript, with no frameworks - one with revolutionary technology (Object.observe), and one with an original concept (overriding get/set). Spoiler alert - the secon
Dexie.js - Minimalistic IndexedDB Wrapper
Reactive Dexie 3.2 integrates better with front-end frameworks. Query the db without boilerplate and let your components mirror the database in real time. Show me » Easy to learn Dexie was written to be straightforward and easy to learn. If you've ever had to work with native IndexedDB then you'll certainly appreciate Dexie's concise API. Dive right in »
React Bootstrap | React Bootstrap
React-Bootstrap replaces the Bootstrap JavaScript. Each component has been built from scratch as a true React component, without unneeded dependencies like jQuery. As one of the oldest React libraries, React-Bootstrap has evolved and grown alongside React, making it an excellent choice as your UI foundation. Built with compatibility in mind, we embrace our bootstrap core and strive to be compatibl
Immutable.js
Immutable collections for JavaScript Immutable data cannot be changed once created, leading to much simpler application development, no defensive copying, and enabling advanced memoization and change detection techniques with simple logic. Persistent data presents a mutative API which does not update the data in-place, but instead always yields new updated data. Immutable.js provides many Persiste
How JavaScript is Going to Replace Node.js
Everyone has been going bananas about Node.js™ and with good reason: it’s fairly new, it has not yet been tapped out with regards to potential of full monetization, and it allows developers who do not know PHP to do enough back-end development to afford them the ability to front on understanding PHP’s pitfalls. Despite its infancy in the web development world, Node.js has come out on top in the Ja
Building HTML5 Form Validation Bubble Replacements
I've written and spoken about HTML5 form validation over the last few years, and one of the most common questions I get is about bubbles. By bubbles I mean the UI controls browsers display validation errors in. Below you can see Chrome's, Firefox's, and IE's implementations: For whatever reason, we developers (or more likely our designer colleagues) have a deep-seated desire to style these things.
Nginx has big plans for JavaScript
The company plans to let you use JavaScript as an application language in its eponymous Web server Nginx (pronounced “engine x”) has become so popular as a Web server, with an estimated installed base of 140 million websites, that it now runs 38.8 percent of the top 1,000 websites as ranked by Alexa this spring, surpassing Microsoft and Apache servers. It also has attracted the attention of Canoni
Two-Way Data Binding
Let’s build a temperature converter app in Backbone, React, Angular, Meteor and vanilla JavaScript. Vanilla JS °C ⇄ °F Vanilla JS is our baseline. Input values are synchronised using two event handlers, one on each input field. function c2f(c) { return 9/5 * c + 32 } function f2c(f) { return 5/9 * (f - 32) } var celsius = document.getElementById('celsius') var fahrenheit = document.getElementById(
addEventListener polyfill for IE6+
addEventListener-polyfill.js @ ߪ� `� ߪ� //addEventListener polyfill 1.0 / Eirik Backer / MIT Licence (function(win, doc){ if(win.addEventListener)return; //No need to polyfill function docHijack(p){var old = doc[p];doc[p] = function(v){return addListen(old(v))}} function addEvent(on, fn, self){ return (self = this).attachEvent('on' + on, function(e){ var e = e || win.event; e.preventDefault = e.p
Isomorphic JavaScript: The Future of Web Apps
By Spike Brehm This post has been cross-posted on VentureBeat. At Airbnb, we’ve learned a lot over the past few years while building rich web experiences. We dove into the single-page app world in 2011 with our mobile web site, and have since launched Wish Lists and our newly-redesigned search page, among others. Each of these is a large JavaScript app, meaning that the bulk of the code runs in th
GitHub - JakeChampion/fetch: A window.fetch JavaScript polyfill.
If you believe you found a bug with how fetch behaves in your browser, please don't open an issue in this repository unless you are testing in an old version of a browser that doesn't support window.fetch natively. Make sure you read this entire readme, especially the Caveats section, as there's probably a known work-around for an issue you've found. This project is a polyfill, and since all moder
HD.Movie 'Jason Bourne' 2016 online Full
Box Admin ToolsOne central place with access controls, settings, and visibility to keep your enterprise secure. Learn more about Box Admin Tools Box AIBox AI taps into the wealth of knowledge within your enterprise content - making every person in your company smarter and more productive - all while maintaining enterprise-grade security, compliance, and privacy standards. Ask Box AI anything and g
Bye Bye Javascript Promises! | Codaholic
In my previous post, I explored how programming with promises can be made close to programming with values. After some more work on it, and some learning from bluebird, I came to conclude that my brain doesn’t think well with promises. So I wrote a macro for Javascript that expands “tasks” into async state machines that communicate using channels (i.e. CSP). I want to talk about the specific optio
PureScript: A Haskell-like Language that Compiles to JavaScript
Clojure 2024 Jordan Miller discusses the evolution of the Clojure ecosystem, from Rich Hickey's initial vision tackling complexity to its current status as a mature enterprise solution. He explains key philosophies, highlights pivotal moments like the "Simple Made Easy" talk, and showcases the vibrant Clojure community and its innovative tools.
PureScript
A strongly-typed functional programming language that compiles to JavaScript Benefits Compile to readable JavaScript and reuse existing JavaScript code easily An extensive collection of libraries for development of web applications, web servers, apps and more Excellent tooling and editor support with instant rebuilds An active community with many learning resources Build real-world applications us
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
GitHub - lukehoban/es6features: Overview of ECMAScript 6 features
GitHub - VerbalExpressions/JSVerbalExpressions: JavaScript Regular expressions made easy
Textarea onchange detection