Harmony Of My Dreams – Brendan Eich
Continuing in the vein of paren-free, I’d like to present a refreshed vision of JavaScript Harmony. This impressionist exercise is of course not canonical (not yet), but it’s not some random, creepy fanfic either. Something like this could actually happen, likelier and better if done with your help (more on how at the end). I’m blurring the boundaries between Ecma TC39’s current consensus-Harmony,
strawman:value_proxies [ES Wiki]
For performance reasons, we want a complex number to be represented in a single block of memory, which we call a value proxy. This value proxy should include both the real and complex components, plus a pointer to data/methods etc that are common to all complex numbers. The alternative of having separate proxy and handler objects (plus closure state) for each complex seems too heavyweight. We want
ES Harmony の Proxy について #fxdevcon で LT してきました - mooz deceives you
LT on Firefox Developer Conference 2010 404 Not Found | Mozilla Japan で ECMAScript Harmony の Proxy について LT させて頂きました. 発表資料 発表に使った資料を SlideShare にアップロードしました. 途中, Harmony を Harmoney と書いているところが多々ありますが, やさしく見過ごしてやって下さい. 追記 (2011 2/23 21:01) スライド中，以下のように has (in 演算子に対応) が第一引数に Proxy のインスタンスを受けとるような書き方をしてしまっていますが，これは誤りです． Proxy.create({ has: function (p, name) { } }); Proxy.create({ has: function (_, nam
Proxy Inception – Brendan Eich
(Mobile/No-Flash version) These are based directly on the excellent work of Mark Miller and Tom Van Cutsem, who developed the harmony:proxies proposal that is now approved for the next major iteration of the JavaScript standard (ECMA-262, probably edition 6 but we’ve learned the hard way not to number prematurely — anyway, approved for “ECMAScript Harmony” [my original Harmony-coining post]). Harm
Changeset 69516 – WebKit ― [ES5] Implement strict mode
Show lines around each change Show the changes in full context Timestamp: Oct 11, 2010, 12:12:29 PM (15 years ago) Author: oliver@apple.com Message: 2010-10-01 Oliver Hunt <oliver@apple.com> Reviewed by Gavin Barraclough. [ES5] Implement strict mode https://bugs.webkit.org/show_bug.cgi?id=10701 Initial strict mode implementation. This is the simplest implementation that could possibly work and a
コア・JavaScript ( JavaScript. The Core. ) - oogattaの勉強日記
この文章は、 Dmitry A. Soshnikov さんの、 ECMAScript に関する優れた記事 "JavaScript. The Core." を許可を得て翻訳したものです。世の中に、 JavaScript のブラウザ API や、実装系に関する記事は多々あれど、 ECMAScript の仕様に則って、ここまで詳しく説明してくれている記事は殆ど無いと思います。今回は翻訳できておりませんが、文中で参照されている Dmitry さんの ES3 シリーズも、読み応えのある（ ECMAScript3 の仕様の副読本としても読める）素晴らしい内容ですので、是非チャレンジしてみてください！（ご要望があれば訳します翻訳許可を頂いたので、この記事内で参照されている章から逐次翻訳を進めます！）。 ちなみに Dmitry さんは、計算機科学や数学にも明るい方でらっしゃいます。が、私は違います。極力
Annotated ES5
Annotated ECMAScript 5 The present document provides an annotated HTML view of the standard ECMA 262, Edition 5, which is also known as ECMAScript Language Specification, 5th edition. NOTE The present document is not a normative version of the ECMAScript spec. Though it does include the full text of the spec, it is in fact a completely non-normative derivative work that is based on the spec—and is
harmony:proxies [ES Wiki]
See also: the discussion thread on the es-discuss mailing list. A tech talk on harmony proxies is available here. To enable ES programmers to represent virtualized objects (proxies). In particular, to enable writing generic abstractions that can intercept property access on ES objects. Driving forces:
Eval ContextとかInteractive JS Shellとかもろもろ - 枕を欹てて聴く
オレ標準JavaScript勉強会での発表のSlideです. IJS: Interactive JS Shell - Constellation Scorpius 内容はInteractive JS Shellを実装する際に問題になる, Token Streamの問題, そして同一Contextでの評価の継続の問題です. Tumblrがまさかのmaintenanceだったりとあせりましたが, 何とか終了することができました. 例によって早口で, かつアレゲ内容でわかりにくくて申し訳ないです. 今日あった方々はすさまじい方ばかりで, 自分もがんばらないとなあと思いました. さしあたってはFirefoxのChangeLogを購読しLDRの未読件数を追い込んでみようと思います. そして全然関係ないですが, 土下座スタックを積むと容量を圧迫し他のスタックを一気にスワップアウトさせて心のHDDをがり
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ECMA-262-5 in detail. Chapter 2. Strict Mode.
Dmitry Soshnikov Software engineer interested in learning and education. Sometimes blog on topics of programming languages theory, compilers, and ECMAScript. Introduction In this chapter we will concentrate on another feature of the ECMA-262-5. The topic of the discussion is a strict variant (or strict mode) of an ECMAScript program. We’ll discuss the reasons for providing this feature, how it aff
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Changes to ECMAScript, Part 2: Harmony Highlights - Proxies and Traits
Google Tech Talk April 20, 2010 ABSTRACT Presented by Tom Van Cutsem. We discuss two proposed language features for inclusion in ECMAScript-Harmony. The first, dynamic proxies, enables Javascript programmers to create proxy objects that can intercept property access, assignment, enumeration, etc. It is a powerful metaprogramming mechanism that provides a standard API for creating generic
strawman:name_property_of_functions [ES Wiki]
(new Function).name === “anonymous” wanted by the Web, according to this webkit bug (function(){}).name === ““ may be wanted too, we suspect – we aren’t sure, though, so this behavior of some browser-based implementations is not strong precedent function f(){} assert(f.name === “f”) is implemented by several browsers, with name not writable and not configurable
ECMAScript 5: The Definitive Slides
ECMAScript 5: The Definitive Slides David Flanagan http://davidflanagan.com david@davidflanagan.com Overview of ES5 Useful new APIs Mostly things that can already be done in ES3 Property and object attributes getters and setters, constants, non-enumerable methods, sealed and frozen objects partially implemented in latest Firefox and Chrome alphas. Strict semantics opt-in strict mode; not backward-
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strawman:binary_data [ES Wiki]
http://www.traitsjs.org/
harmony_highlights_techtalk.pdf - Powered by Google ドキュメント
ECMA-262-5 in detail. Chapter 1. Properties and Property Descriptors.