ecma

Maximum object children on node js [duplicate]

由 坚强是说给别人听的谎言 提交于 2021-01-20 08:00:21
问题 This question already has answers here : Are there limits to the number of properties in a JavaScript object? (6 answers) Closed 8 days ago . I'm aware that the ECMA script spec says that an object can have infinite children however I also understand many ECMA script implementations do not conform to this. I was wondering if node has a limit on the amount of children an object can have? Thanks, Ed. 回答1: Yes it can but until heap out of memory. var a = {}; var i = 0; while(true){ a[i] = null;

Maximum object children on node js [duplicate]

由 别等时光非礼了梦想. 提交于 2021-01-20 07:58:30
问题 This question already has answers here : Are there limits to the number of properties in a JavaScript object? (6 answers) Closed 8 days ago . I'm aware that the ECMA script spec says that an object can have infinite children however I also understand many ECMA script implementations do not conform to this. I was wondering if node has a limit on the amount of children an object can have? Thanks, Ed. 回答1: Yes it can but until heap out of memory. var a = {}; var i = 0; while(true){ a[i] = null;

ECMA-262 Introduction (简介)

由 核能气质少年 提交于 2020-03-01 06:59:30
Introduction 简介 This Ecma Standard is based on several originating technologies, the most well known being JavaScript (Netscape) and JScript (Microsoft). The language was invented by Brendan Eich at Netscape and first appeared in that company’s Navigator 2.0 browser. It has appeared in all subsequent browsers from Netscape and in all browsers from Microsoft starting with Internet Explorer 3.0. ECMA 标准基于几个源技术。比如大家所知道的 JavaScript ( Netscape ) , JScript ( Microsoft ). 语言的发明者是 Netscape ( 以下略称 NS ) 的 Brendan Eich . JS 的第一次出现是在 NS 公司的浏览器 Navigator 2.0 随后则出现在后续的所有 NS 浏览器中。微软则是在 IE3.0 开始出现。 The

Why is there no ISO or ECMA standardization for C# later than 2.0?

由 一笑奈何 提交于 2020-01-01 09:18:49
问题 I have started learning C# and was looking for a standard specification, but found that C# versions greater than 2.0 were not standardized by ISO or ECMA (or so I gathered from Wikipedia). Is there any reason for this? 回答1: Because writing, reviewing, validating, publishing, processing feedback, revising, re-publishing etc complex specification documents takes significant time and effort, which is a finite resource - and the demand for an ISO / ECMA version of the specification hasn't been

Why did ECMASCRIPT 6 reverse the sides for assignment when destructuring? [closed]

由 寵の児 提交于 2019-12-29 09:06:52
问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . Why did ES6 decide that left-side assignment made more sense or was more useful for destructured assignments? Just on first look, it seems to make code more error prone, now that assignment can happen on both sides, depending on situation. let obj = { first: 'Jane', last: 'Doe' }; let { first: f,

NFC standards (NFC Forum, ISO/IEC, ECMA

由 試著忘記壹切 提交于 2019-12-20 08:39:14
问题 I am often being asked about standards, the NFC is based on. I summarized my knowledge in the text below. I hope it can be an answer to such questions. Please feel free to correct it by posting comments and replies - I will include it into my text. Since NFC is based on RFID, it is often seen as RFID extension, its form or subset. It is correct because many existing standards from RFID were adopted in the NFC. The NFC base standard for physical layer is NFCIP-1 (ISO 18092 or ECMA 340) - it

ECMAScript 2017: Why does EscapeSequence include NonEscapeCharacter?

由 旧巷老猫 提交于 2019-12-12 18:20:37
问题 The below excerpts refer to ECMAScript 2017. 11.8.4 String Literals, Note 1 A string literal is zero or more Unicode code points enclosed in single or double quotes. Unicode code points may also be represented by an escape sequence. .... Any code points may appear in the form of an escape sequence. 11.8.4 String Literals, Syntax Nonterminal symbol EscapeSequence has the following lexical grammar production: EscapeSequence :: CharacterEscapeSequence 0 [lookahead ∉ DecimalDigit]

Is it statistically safe to use proposals in Stage 3 of ECMA?

由 时间秒杀一切 提交于 2019-12-11 05:07:13
问题 Background I am referring to the ... operator. Many people like and support the idea of doing the following: const obj = { "hello": 1 }; const obj2 = { "world": 2, ...obj }; Problem I personally like this syntax over the typical Object.assign but recently when I started using it in my project I had this eslint error: Object Spread - Parsing error: Unexpected token The solution to this can be seen in the following links: https://github.com/eslint/eslint/issues/4052 https://eslint.org/docs/1.0

ECMAScript: Lexical Grammar vs Syntactic Grammar

由 陌路散爱 提交于 2019-12-10 11:53:35
问题 I am having some difficulties understanding the specific difference between Lexical Grammar and Syntactic Grammar in the ECMAScript 2017 specification. Excerpts from ECMAScript 2017 5.1.2 The Lexical and RegExp Grammars A lexical grammar for ECMAScript is given in clause 11. This grammar has as its terminal symbols Unicode code points that conform to the rules for SourceCharacter defined in 10.1. It defines a set of productions, starting from the goal symbol InputElementDiv,

How do I find the latest Typescript target support for any version of node?

由 自作多情 提交于 2019-12-07 09:33:36
问题 Assuming any version of Node, how do I find the corresponding Typescript Compiler Option for target that gives most the functionality? I want to remove the guest work. Specify ECMAScript target version: "ES3" (default), "ES5", "ES6"/"ES2015", "ES2016", "ES2017" or "ESNext". I run different versions of node, and I want to know when is the minimum node version to enable the different TSC targets. 回答1: One method to accomplish this is to check out the site http://node.green. Find your version of
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