Download Cocoa Design Patterns by Erik M. Buck, Donald A. Yacktman PDF
By Erik M. Buck, Donald A. Yacktman
"Next time a few child indicates up at my door inquiring for a code assessment, this can be the publication that i'm going to throw at him."
-Aaron Hillegass, founding father of titanic Nerd Ranch, Inc., and writer of Cocoa Programming for Mac OS X
Unlocking the secrets and techniques of Cocoa and Its Object-Oriented Frameworks
Mac and iPhone builders are frequently crushed via the breadth and class of the Cocoa frameworks. even supposing Cocoa is certainly large, when you comprehend the object-oriented styles it makes use of, you'll locate it remarkably dependent, constant, and simple.
Cocoa layout Patterns starts with the mummy of all styles: the Model-View-Controller (MVC) development, that is imperative to all Mac and iPhone improvement. inspired, and in certain cases enforced by means of Apple's instruments, it's vital to have an organization grab of MVC correct from the start.
The book's middle is a catalog of the fundamental layout styles you'll come across in Cocoa, including
* basic styles, similar to enumerators, accessors, and two-stage creation
* styles that empower, resembling singleton, delegates, and the responder chain
* styles that disguise complexity, together with bundles, type clusters, proxies and forwarding, and controllers
And that's now not them all! Cocoa layout Patterns painstakingly isolates 28 layout styles, observed with real-world examples and pattern code you could follow in your purposes at the present time. The e-book wraps up with assurance of center facts types, AppKit perspectives, and a bankruptcy on Bindings and Controllers.
Cocoa layout Patterns truly defines the issues every one trend solves with a beginning in Objective-C and the Cocoa frameworks and will be utilized by any Mac or iPhone developer. [/li]
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Extra resources for Cocoa Design Patterns
Sample text
The group command can best be viewed as a simpler version of MapReduce (covered later in this chapter). group comes with three fairly serious limitations: 1. It operates only on data sizes of 10,000 unique keys or less. 2. 8 and higher). 3. It doesn’t work in sharded environments. MapReduce does not suffer from any of these limitations and should be used as a substitute whenever anticipating any of these situations. One would wonder why to use group at all. As long as the three limitations are not a hindrance, then it operates a measurable amount faster than MapReduce while also providing a slightly simpler interface to work with.
N"; } Adding another document to the address book we created in Chapter 2. Defining the map function. It’s important to recognize that the MapReduce functions are written in JavaScript and run on the server. The map function references the variable this to inspect the current document. Inside a map function, emit(key,value) is called once for every value wanting to be fed to the reducer. In most cases, this will only be one time (as the example here), but if we wanted to count superpowers (or for a blog, tags), we would call it multiple times (or even no times if no superpowers existed).
8 and higher). 3. It doesn’t work in sharded environments. MapReduce does not suffer from any of these limitations and should be used as a substitute whenever anticipating any of these situations. One would wonder why to use group at all. As long as the three limitations are not a hindrance, then it operates a measurable amount faster than MapReduce while also providing a slightly simpler interface to work with. Group Parameters The group command takes three required parameters: 42 | Chapter 3: Advanced MongoDB key The fields to group by in an array or object.