Pro JavaScript Design Patterns 2008 phần 10 pptx

... functions, 110 privileged methods, 34, 110 programming styles, 3 protection proxies, 200 prototypal inheritance, 41, 45–49 vs. classical, 49 edit-in-place field using, 55–58 use of, 62 prototype ... 227–230 IS-A relationships, 128 isHighLatency method, 104 _isInitialized method, 211–212 isOffline method, 104 J JavaScript design patterns, 9 10 emulating interfaces in, 14–18 encapsu...

Ngày tải lên: 12/08/2014, 23:20

... _$(arguments); }; })(); CHAPTER 6 ■ CHAINING 85 7257ch06a.qxd 11/15/07 10: 37 AM Page 85 Design Patterns PART 2 ■ ■ ■ 7257ch07.qxd 11/15/07 10: 38 AM Page 91 displayResult: function(response) { // Output ... possible. It is one of the most useful patterns in JavaScript and has its place in almost every project, no matter how large or small. In quick and simple projects, a singleton...

Ngày tải lên: 12/08/2014, 23:20

... baz; (function() { var foo = 10; var bar = 2; baz = function() { return foo * bar; }; })(); CHAPTER 1 ■ EXPRESSIVE JAVASCRIPT 7 908Xch01.qxd 11/15/07 10: 31 AM Page 7 Pro JavaScript ™ Design Patterns Ross ... . . . 197 How Does the Proxy Control Access to Its Real Subject? . . . . . . . 197 Virtual Proxy, Remote Proxy, and Protection Proxy. . . . . . . . . . . . . . 200 The Pro...

Ngày tải lên: 12/08/2014, 23:20

... mentioned in the Gang of Four’s Design Patterns says “Program to an interface, not an implementation,” telling you how funda- mental this concept is. The problem is that JavaScript has no built-in ... useful. In a large project, with many different programmers writing code, interfaces are essential. Often programmers are asked to use an API that hasn’t been written yet, or are asked to...

Ngày tải lên: 12/08/2014, 23:20

... 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'); // The findProduct ... new Author('Dustin Diaz', [&apos ;JavaScript Design Patterns& apos;]); author[1] = new Author('Ross Harmes', [&apos ;JavaScript Design Patterns& apos;]); auth...

Ngày tải lên: 12/08/2014, 23:20

... PATTERN 103 7257ch07.qxd 11/15/07 10: 38 AM Page 103 The feedProxy.php script used in the XHR request is a proxy that allows fetching data from external domains without running up against JavaScript s ... FACTORY PATTERN 105 7257ch07.qxd 11/15/07 10: 38 AM Page 105 Interface.ensureImplements(bicycle, Bicycle); return bicycle; }; /* GeneralProductsBicycleShop class. */ var GeneralP...

Ngày tải lên: 12/08/2014, 23:20

... styles) { for ( var prop in styles ) { if (!styles.hasOwnProperty(prop)) continue; setStyle(el, prop, styles[prop]); } } CHAPTER 10 ■ THE FACADE PATTERN 145 908Xch10.qxd 11/15/07 10: 57 AM Page 145 var ... 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 sa...

Ngày tải lên: 12/08/2014, 23:20

... browsers implement the console object: /* SimpleProfiler class. */ var SimpleProfiler = function(component) { this.component = component; }; SimpleProfiler.prototype = { buildList: function() { var ... superclass. FrameColorDecorator.prototype.assemble = function() { return 'Paint the frame ' + this.frameColor + ' and allow it to dry. ' + this.bicycle.assemble(); }; Frame...

Ngày tải lên: 12/08/2014, 23:20

... 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 JavaScript. A ... that._initialize(); }); // Initialization trigger. TestProxy.superclass.constructor.apply(this, arguments); }; extend(TestProxy, DynamicProxy); TestProxy.prototype._isInitialized = func...

Ngày tải lên: 12/08/2014, 23:20

... instantiate. Benefits of the Proxy Pattern Each type of proxy has a different set of benefits. The remote proxy allows you to treat a remote resource as a local JavaScript object. This is obviously ... subject. The protection proxy controls which clients can access methods of the real subject. It is impossible to implement in JavaScript and was ignored in this chapter. The remote proxy...

Ngày tải lên: 12/08/2014, 23:20