Using "Object.create" instead of "new"
Javascript 1.9.3 / ECMAScript 5 introduces Object.create, which Douglas Crockford amongst others has been advocating for a long time. How do I replace new in the code below with Object.create? var UserA = function(nameParam) { this.id = MY_GLOBAL.nextId(); this.name = nameParam; } UserA.prototype.sayHello = function() { console.log('Hello '+ this.name); } var bob = new UserA('bob'); bob.sayHello()
Haida's weblog: JavaScript ã®ç¶™æ‰¿
11/20/2007 JavaScript ã®ç¶™æ‰¿ JavaScript 㨠オブジェクト指å‘プãƒã‚°ãƒ©ãƒŸãƒ³ã‚° (Object-Oriented Programming: OOP) ã«æš«ã焦点を当ã¦ã¦ã„ãã¾ã™ã€‚OOP ä¸»è¦ 3 原則カプセル化継承ãƒãƒªãƒ¢ãƒ¼ãƒ•ã‚£ã‚ºãƒ 継承OO デザインã®ç‰¹å¾´ã¨ã—ã¦ã€å†åˆ©ç”¨ãŒã‚ã‚Šã¾ã™ã€‚å†åˆ©ç”¨ã®çŽ‹é“ã¯ç¶™æ‰¿ã§ã™ã€‚スーパークラスã¯ã‚µãƒ–クラスã«ã‚ˆã£ã¦ç”Ÿæˆã•ã‚Œã‚‹ã‚µãƒ–クラスã¯ã‚¹ãƒ¼ãƒ‘ークラスã®å…¨ã¦ã®ãƒ¡ã‚½ãƒƒãƒ‰ã¨ãƒ—ãƒãƒ‘ティを継承ã™ã‚‹ã‚µãƒ–クラスã§ã¯ç¶™æ‰¿ã—ãŸã‚¹ãƒ¼ãƒ‘ークラスã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚„プãƒãƒ‘ティをオーãƒãƒ¼ãƒ©ã‚¤ãƒ‰ã§ãã‚‹JavaScript ã§ã¯ç¶™æ‰¿ãŒå…¬å¼ã«ã‚µãƒãƒ¼ãƒˆã•ã‚Œã¦ã„ã¾ã›ã‚“ãŒã€ç¶™æ‰¿ã‚’実装ã™ã‚‹ã“ã¨ã¯ã§ãã¾ã™ã€‚ 継承ã®æ–¹æ³•ã‚’ 2 通見ã¦ã¿ã¾ã™ã€‚ ãã® 1: 関数ã«ã‚ˆã‚‹ç¶™æ‰¿ã‚µãƒ–クラスã®ã‚ªãƒ–ジェクト定義ã®ä¸ã§ã€ã‚¹ãƒ¼ãƒ‘ークラスã®ã‚³ãƒ³ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã‚’呼ã¶æ–¹æ³•ã§ã™ã€‚ ã¾ãšä»¥ä¸‹ã®ã‚ˆã†ã«ã‚¹ãƒ¼ãƒ‘ークラスã¨ã‚µãƒ–ク
Vjeux » Javascript – How Prototypal Inheritance really works
Everywhere on the web we read that Javascript has prototypal inheritance. However Javascript only provides by default a specific case of prototypal inheritance with the new operator. Therefore, most of the explanations are really confusing to read. This article aims to clarify what is prototypal inheritance and how to really use it on Javascript. Prototypal Inheritance Definition When you read abo
JavaScript. The Core.
Read this article in: German, Russian, French, Polish. Note: a new 2nd Edition of this article is available. This note is an overview and summary of the “ECMA-262-3 in detail†series. Every section contains references to the appropriate matching chapters so you can read them to get a deeper understanding. Intended audience: experienced programmers, professionals. We start out by considering the co
Understanding JavaScript Prototypes.
(en Español, руÑÑком, ä¸æ–‡) JavaScript’s prototype object generates confusion wherever it goes. Seasoned JavaScript professionals, even authors frequently exhibit a limited understanding of the concept. I believe a lot of the trouble stems from our earliest encounters with prototypes, which almost always relate to new, constructor and the very misleading prototype property attached to functions. In
Collection & Copy - JavaScriptã«ãŠã‘ã‚‹å¤å…¸çš„継承
翻訳 原文：Classical Inheritance in JavaScript著者：Douglas Crockford ※原文ã®ã‚³ãƒ¼ãƒ‰å†…ã«èª¤ã‚ŠãŒã‚ã‚Šã€ã“ã®ã¾ã¾è¨˜è¿°ã—ã¦ã‚‚動作ã—ã¾ã›ã‚“。著者ã®ã‚³ãƒ¡ãƒ³ãƒˆåŠã³è£œè¶³æƒ…å ±ã¯ç¿»è¨³ãƒ¡ãƒ¢ã‚’å‚照下ã•ã„。 å›ã¯è‡ªåˆ†ãŒåˆ©å£ã§éšŽç´šã«ã‚‚属ã•ãšã€€è‡ªç”±ã ãªã‚“ã¦æ€ã„込んã§ã‚‹â€•John LennonJavaScriptã¯ã€ã‚¯ãƒ©ã‚¹ã¨ã„ã†æ¦‚念ã«å›šã‚ã‚Œã¦ã„ãªã„言語ã§ã™ã€‚JavaScriptã§ã¯ã€å¤å…¸çš„ãªç¶™æ‰¿ã®ä»£ã‚ã‚Šã«ãƒ—ãƒã‚¿ã‚¤ãƒ—çš„ãªç¶™æ‰¿ã‚’使用ã—ã¾ã™ã€‚ã“ã‚Œã¯C++ã‚„Javaã®ã‚ˆã†ãªæ—§æ¥ã®ã‚ªãƒ–ジェクト指å‘言語ã«é•·ã‘ãŸãƒ—ãƒã‚°ãƒ©ãƒžã‚’当惑ã•ã›ã‚‹ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“。JavaScriptã®ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—的継承ãŒã€å¤å…¸çš„継承ã«æ¯”ã¹ã¦ã„ã‹ã«è¡¨ç¾åŠ›ãŒå„ªã‚Œã¦ã„ã‚‹ã‹ã‚’ã€ã“ã‚Œã‹ã‚‰è¦‹ã¦ã„ãã¾ã—ょã†ã€‚ JavaJavaScriptå¼·ã„型付ã‘å¼±ã„型付ã‘é™çš„å‹•çš„å¤å…¸çš„プãƒãƒˆã‚¿ã‚¤ãƒ—的クラス関数コンストラクタ関数メソッド関
Prototypal Inheritance
Prototypal Inheritance in JavaScript Douglas Crockford www.crockford.com Five years ago I wrote Classical Inheritance in JavaScript (Chinese Italian Japanese). It showed that JavaScript is a class-free, prototypal language, and that it has sufficient expressive power to simulate a classical system. My programming style has evolved since then, as any good programmer's should. I have learned to full
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