harmony:typeof_null [ES Wiki]
under the Harmony version, but the Result would remain “object” under the default version. Version details TBD. Some JS on the web carefully tests both typeof x === “object” && x === null or equivalent in order to distinguish null from an object reference. Other code is less careful. The ongoing burden on JS authors, maintainers, teachers, and learners is a small but (over time) significant cost.
proposals:typeof [ES Wiki]
I think it is too late to fix typeof. The change proposed for typeof null will break existing code. For example, isNull functions have been written by idiots as function isNull(a) { return typeof a == 'object' && !a; } It is possible to write an isNull that performs correctly with the fixed typeof, but existing code cannot anticipate the change. Perhaps a better alternative is a new operator, mayb
strawman:guards [ES Wiki]
Guards are used as a convenient syntax for enforcing user-defined invariants. They can be used as types, but can also enforce arbitrary constraints. Use guards to annotate variable and parameter declarations, function return results, and property definitions. Each guard is asked to approve an incoming value, the specimen, to determine whether to let it pass, coerce it, or reject it. Examples of us
harmony:specification_drafts [ES Wiki]
This page contains a historical record of working draft of the ES.next specification prepared by the project editor. Error in the current draft should be reported as bugs at bugs.ecmascript.org July 25, 2011 Draft doc pdf Mostly typo corrections (thanks for all the reports) and corrections to problems that have been reported against ES5.1. See closed 6th edition bugs at bugs.ecmascript.org.
harmony:harmony [ES Wiki]
The harmony namespace is intended to contain approved proposals for the ES-Harmony language. The following requirements, goals, and means help to inform and guide development of proposed extensions and improvements to ES5 for ES-Harmony. Straw-man proposals live in strawman until approved by TC39, at which point they move into the harmony namespace, linked from the proposals page. — Brendan Eich 2
harmony:proper_tail_calls [ES Wiki]
We need to define when a call is in possible tail position for safety purposes, and proper tail position for liveness purposes. An implementation MAY implement a call in possible tail position as a proper tail call (PTC) and MUST implement a call in proper tail position as a PTC. (Loosely speaking, implementing a call as a PTC is also known as tail call optimization.) The old ES4 proposal for prop
start [ES4 Wiki]
This is a wiki for the ongoing specification work of Ecma TC39, the technical committee tasked with standardization of the ECMAScript programming language. Most of the wiki is world-readable, meaning that anyone can view the pages. Certain sections are restricted to members of the technical committee. The wiki is running on DokuWiki, a wiki program for editing documentation. It has several feature
harmony:generators [ES Wiki]
This proposal has progressed to the Draft ECMAScript 6 Specification, which is available for review here: specification_drafts. Any new issues relating to them should be filed as bugs at http://bugs.ecmascript.org Overview First-class coroutines, represented as objects encapsulating suspended execution contexts (i.e., function activations). Prior art: Python, Icon, Lua, Scheme, Smalltalk. The “inf
strawman:typed_arrays [ES Wiki]
The WebGL spec needs a method for high-performance access to native-typed data. That group invented its own set of objects for this, but it has now been adopted in FileAPI, FileWriter, XHR2, and is being considered for Web Sockets. Other groups like CommonJS have also been working on something similar. The core of the proposal is found here https://cvs.khronos.org/svn/repos/registry/trunk/public/w
1
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
harmony:proto_operator [ES Wiki]
discussion:typeof [ES Wiki]
harmony:destructuring [ES4 Wiki]
harmony:typed_objects [ES Wiki]