Is JavaScript getting worse?
Is JavaScript getting worse? javascript 18 Any headline which ends in a question mark can be answered by the word “no.†– Betteridge’s law of headlines There is a lot of anticipation about the next release of JavaScript, ES6. There are certainly going to be some very nice features: Fat arrow (=>) syntax Spread operator Best of all, proper tail calls But JavaScript is not content merely to improve
ECMAScript 2015 support in Mozilla - Archive of obsolete content | MDN
This is an archived page. It's not actively maintained. ECMAScript 2015 is the sixth edition of the ECMAScript Language Specification standard. It defines the standard for the JavaScript implementation in SpiderMonkey, the engine used in Firefox and other Mozilla applications. Code-named "ES.next", "Harmony", or "ECMAScript 6", the first working draft (based on ECMAScript 5.1) was published on Jul
JavaScriptã®ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—ãƒã‚§ãƒ¼ãƒ³ - Qiita
å…ƒãƒã‚¿:JavaScriptã¯ã„ã‹ã«ã—ã¦prototypeã‚’æ¨ã¦ã‚¯ãƒ©ã‚¹ãƒ™ãƒ¼ã‚¹ç¶™æ‰¿ã‚’å¾—ã‚‹ã®ã‹ - ãªã‚“ãŸã‚‰ãƒŽãƒ¼ãƒˆç¬¬ä¸‰æœŸãƒ™ãƒ¼ã‚¿ ãªã‚“ã‹è‰²ã€…çªã£è¾¼ã¿ãŸã‹ã£ãŸã®ã§ã€‚ ã“ã®äººã¯ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—ãƒã‚§ãƒ¼ãƒ³ã§ã‚¯ãƒ©ã‚¹ãƒ™ãƒ¼ã‚¹ã®è¨€èªžã¨åŒã˜ã“ã¨ã‚’ã‚„ã‚ã†ã¨ã—ã¦ã„ã‚‹ã®ã‹ãªã€‚ プãƒãƒˆã‚¿ã‚¤ãƒ—ãƒã‚§ãƒ¼ãƒ³ã¯ã€ãŸã ã®é“å…· npm ã«ã‚ã‚‹ã»ã¨ã‚“ã©ã®ãƒ©ã‚¤ãƒ–ラリãŒãƒã‚§ãƒ¼ãƒ³ã‚’æ´»ã‹ã—ã¦ä½œã‚‰ã‚Œã¦ãªã„ç†ç”±ãŒèª¬æ˜Žã§ããªã„。 プãƒãƒˆã‚¿ã‚¤ãƒ—ãƒã‚§ãƒ¼ãƒ³ã¯ã€ãれ自体ãŸã ã®é“å…·ã§ã™ã€‚ã»ã¨ã‚“ã©ã®ãƒ©ã‚¤ãƒ–ラリã§ä½¿ã‚ã‚Œãªã„ã¨æœ‰ç”¨ã§ã¯ãªã„ã€ãªã‚“ã¦ã“ã¨ã¯ãªã„ã¯ãšã§ã™ã€‚ ãã‚‚ãã‚‚ã€ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—ãƒã‚§ãƒ¼ãƒ³ã®ä»•çµ„ã¿ã¯çµæ§‹åˆ©ç”¨ã•ã‚Œã¦ã„ã¾ã™ã€‚æ°—ã¥ã„ã¦ã„ãªã„ã ã‘ã€ã˜ã‚ƒãªã„ã§ã™ã‹ã。 メソッドã¨ãれ以外ã®ãƒ—ãƒãƒ‘ティ ã¡ã‚‡ã£ã¨ã¾ã£ã¦ã€JavaScript ã®ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—ãƒã‚§ãƒ¼ãƒ³ã®æ•™ç§‘書ã§ã“ã®ã€n ã¨ã„ã†åˆæœŸåŒ–パラメータをæŒã¤ã‚ªãƒ–ジェクトã®ç¶™æ‰¿ã¯ã©ã†ã„ã†ãµã†ã«å®Ÿè£…ã—ãŸã£ã‘?? プãƒãƒˆã‚¿ã‚¤ãƒ—ãƒ
String.prototype.normalizeãŒå®Ÿè£…ã•ã‚ŒãŸ - JS.next
実装ã•ã‚ŒãŸãƒ¡ã‚½ãƒƒãƒ‰ String.prototype.normalize(form = "NFC") form（åˆæœŸå€¤ï¼š"NFC"）ã®å½¢å¼ã§æ£è¦åŒ–ã—ãŸæ–‡å—列を返㙠詳細 複雑ãªæ–‡å—ã¯ã€ä¸€æ–‡å—ã«è¦‹ãˆã¦ã‚‚ã€æ–‡å—コード上ã¯è¤‡æ•°ã®æ§‹æˆæ–‡å—ã‹ã‚‰æˆã‚Šç«‹ã£ã¦ã„ã‚‹å ´åˆãŒã‚る。 例ãˆã°ã€ã€ŽãŒã€(æ¿ç‚¹ä»˜ã平仮åã‹)ã¨ã€ã€Žã‹ã€(平仮åã‹) ＋『゛[U+3099]ã€(åˆæˆç”¨æ¿ç‚¹)ã¯ã€ åŒã˜æ„味をæŒã¡åŒã˜ã‚ˆã†ã«è¦‹ãˆã‚‹ãŒã€æ–‡å—コードãŒç•°ãªã‚‹ãŸã‚ãã®ã¾ã¾ã§ã¯ãƒ—ãƒã‚°ãƒ©ãƒ 上ã§ã¯ç•°ãªã‚‹æ–‡å—列ã¨ã—ã¦æ‰±ã‚ã‚Œã¦ã—ã¾ã†ã€‚ ga_NFC = 'ãŒ' // 'ãŒ' ga_NFD = 'ã‹\u3099' // 'ã‹ã‚™' escape(ga_NFC) // '%u304C' escape(ga_NFD) // '%u304B%u3099' ga_NFC.length // 1 ga_NFD.length // 2 ga_NFC == ga_
ECMAScript 6: TC39 meetings, March–November 2013
TC39 [1] is the committe that currently plans ECMAScript 6 (code-named ECMAScript.next), the next version of the JavaScript language standard. In this blog post, I’m summarizing the highlights of several meetings that they had in 2013, in March, May, July, September and November. Previous blog posts summarized prior meetings. This post is made possible by Rick Waldron’s excellent notes of the meet
Subclassing builtins in ECMAScript 6
[Update 2015-02-15] Newer version of this blog post: “Classes in ECMAScript 6 (final semantics)†In JavaScript, it is difficult to create sub-constructors of built-in constructors such as Array. This blog post explains the problem and possible solutions – including one that will probably be chosen by ECMAScript 6. The post is based on Allen Wirfs-Brock’s slides from a presentation he held on Janua
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