Pro JavaScript Design Patterns 2008 phần 2 pps

... the interface). CHAPTER 2 ■ INTERFACES 22 908Xch02a.qxd 11/15/07 10: 32 AM Page 22 ■Note There is no single “correct” pattern to use when defining a class; each has its own pros and cons. Depending ... tools in the object-oriented JavaScript programmer’s toolbox. The first principle of reusable object-oriented design mentioned in the Gang of Four’s Design Patterns says “Program...

Ngày tải lên: 12/08/2014, 23:20

... a collection of poorly designed APIs by wrapping them in a single well-designed API. JavaScript Libraries As Facades JavaScript libraries are built for humans. They’re designed to save time, ... of setCSS: function setCSS(el, styles) { for ( var prop in styles ) { if (!styles.hasOwnProperty(prop)) continue; setStyle(el, prop, styles[prop]); } } CHAPTER 10 ■ THE FACADE PATTERN 145 908Xch10...

Ngày tải lên: 12/08/2014, 23:20

... Wed Sep 26 20 07 20 :11: 02 GMT-0700 (PDT) alert(getDateCaps()); // Returns WED SEP 26 20 07 20 :11: 02 GMT-0700 (PDT) CHAPTER 12 ■ THE DECORATOR PATTERN1 72 908Xch 12. qxd 11/15/07 11: 02 AM Page 1 72 This ... objects that have all of the needed features without CHAPTER 12 ■ THE DECORATOR PATTERN1 62 908Xch 12. qxd 11/15/07 11: 02 AM Page 1 62 In the function decorator defini...

Ngày tải lên: 12/08/2014, 23:20

... originally dispatched the event. CHAPTER 15 ■ THE OBSERVER PATTERN 222 908Xch15.qxd 11/15/07 11:06 AM Page 22 2 This dynamic proxy will defer instantiation until you decide it is needed. All methods ... it somewhere in the middle of the range: CHAPTER 16 ■ THE COMMAND PATTERN 22 9 908Xch16.qxd 11/16/07 10:31 AM Page 22 9 Both of these types of proxies can be incredibly useful in the right...

Ngày tải lên: 12/08/2014, 23:20

... xiii f7670b088a34e6aa65a5685 727 db1ff4 Pro JavaScript ™ Design Patterns Copyright © 20 08 by Ross Harmes and Dustin Diaz All rights reserved. No part of this work may be reproduced or transmitted in ... . . . 197 How Does the Proxy Control Access to Its Real Subject? . . . . . . . 197 Virtual Proxy, Remote Proxy, and Protection Proxy. . . . . . . . . . . . . . 20 0 The Proxy Patt...

Ngày tải lên: 12/08/2014, 23:20

... INHERITANCE 52 908Xch04a.qxd 11/15/07 10:34 AM Page 52 // Later in your page, another programmer adds var resetProduct = $('reset-product-button'); var findProduct = $('find-product-button'); ... new Author('Dustin Diaz', [&apos ;JavaScript Design Patterns& apos;]); author[1] = new Author('Ross Harmes', [&apos ;JavaScript Design Patterns& apo...

Ngày tải lên: 12/08/2014, 23:20

... { return new _$(arguments); }; })(); CHAPTER 6 ■ CHAINING 85 725 7ch06a.qxd 11/15/07 10:37 AM Page 85 Design Patterns PART 2 ■ ■ ■ 725 7ch07.qxd 11/15/07 10:38 AM Page 91 displayResult: function(response) ... false; var privateAttribute2 = [1, 2, 3]; function privateMethod1() { } function privateMethod2(args) { } return { // Public members. publicAttribute1: true, publicAttribute...

Ngày tải lên: 12/08/2014, 23:20

... useful. In fact, they’re probably one of the most underused patterns. Of all patterns, this is the simplest to start putting into practice immediately. If you’re building a JavaScript API, this pattern ... {}; extend(GeneralProductsBicycleShop, BicycleShop); GeneralProductsBicycleShop.prototype.createBicycle = function(model) { var bicycle; switch(model) { case 'The Speedster':...

Ngày tải lên: 12/08/2014, 23:20

... subject is initialized or not. CHAPTER 14 ■ THE PROXY PATTERN2 12 908Xch14.qxd 11/15/07 11:05 AM Page 21 2 /* Implement the needed methods. */ StatsProxy.prototype.getPageviews = function(callback, ... Protection Proxy The virtual proxy is probably the most useful type of proxy to JavaScript programmers. Let’s briefly go over the other types and explain why they aren’t as applicable to J...

Ngày tải lên: 12/08/2014, 23:20

... 21 2 21 4 receiver classes, 23 0 receiving objects, 22 7 23 0, 24 5, 26 2 refactoring, 26 2 reflection, 9 reliability issues, with remote proxy, 21 3 remote proxies, 20 0 benefits of, 21 3 drawbacks of, 21 3 performance ... (example), 20 6 21 0 drawbacks of, 21 3 21 4 function of, 197 general, for virtual proxy, 21 0 21 3 introduction to, 197 page statistics (example), 20 1 20 4...

Ngày tải lên: 12/08/2014, 23:20