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On February 1, 2015, I held the 90 minute talk “Using ECMAScript 6 today” at the Rolling Scopes Conference in Minsk. A video recording of that talk is online: Part 1 [40:44] Part 2 [53:04] Slides
Andrew Hillel Senior Web Developer, Content Discovery The new BBC mobile Homepage is a flexible ‘taster menu’ of the BBC's website. I’ve been leading the development of the new Homepage and in this post I explain some of the technical design decisions made during the initial phase of the project. Please note that some of the language in this post is intended for readers with an interest in softwar
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Warning: This blog post is outdated. Instead, read chapter “Classes” in “Exploring JavaScript”. Recently, TC39 decided on the final semantics of classes in ECMAScript 6 [1]. This blog post explains how their final incarnation works. The most significant recent changes were related to how subclassing is handled. Overview # class Point { constructor(x, y) { this.x = x; this.y = y; } toString() { re
ES6 and ES7, the future of Javascript by Brendan Eich After almost 20 years, JavaScript is still growing by all measures: deployed apps, github usage, framework innovation, and of course standardized language evolution. The 6th Edition of the ECMAScript standard, ES6, is all but done. ES7, the next edition, is under parallel construction in order to be finalized a year after ES6. Best of all, roll
Eric Elliott’s essential JavaScript links or The way of the parrot, not How does the novice learner distinguish difficult-to-grasp concepts from inept explanations written by parrots? Follow an expert’s directions. There is a ton of learning material about JavaScript on the web, and as a developer looking to achieve “mastery” in JavaScript, AngularJS and famo.us, I have buried myself under the wei
個人プロジェクトは ES6 で書いている ブログの頻度が落ちているので、継続のための雑さな記事を醸し出す時期。 以前に es6-Kameita を紹介したときの繰り返しですが、Babel (旧名 6to5) の登場から個人プロジェクトは ECMAScript 6 で書くようにしています。仕事でも新しい開発がある予定なので、そこでもきっと ES6 を使うことでしょう。 ahomu/Talkie ahomu/Urler ahomu/Claylump ということで「もう ES6 でいいんじゃないか」という気持ちを書きます。 厳密には、ES6トランスパイラを使っていけばいいんじゃないか、という話 仕様周りは(きっと)安定してきている 世間的の大多数的には、ES6とES7の境界すらハッキリしていないであろう状況ではありますが、ES6自体は2015年中の勧告を目標に進んでいることから、それなりに安定し
var mockRegister = MyDispatcher.register; var mockRegisterInfo = mockRegister.mock; var callsToRegister = mockRegisterInfo.calls; var firstCall = callsToRegister[0]; var firstArgument = firstCall[0]; var callback = firstArgument; Jestは基本全てがモックされるので、要は「Dispatcherのregisterに与えられた引数が観測できるから、Storeのcallbackを捕捉してテストしたい内容に合わせて適宜実行せよ」ということである。 この動作、SinonのSpyにも同じような実装がある。spy.firstCallやspy.getCallが定義されており、n度
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