文件名称:
APress Pro JavaScript Design Patterns.zip
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文件大小: 933kb
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上传时间: 2008-03-20
详细说明： JavaScript is at a turning point. The language and those who program with it have matured.
People are starting to realize that it is a complex subject, worthy of further study.
Design patterns have been used in programming for years. They were first formally documented
in Design Patterns by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides
(affectionately known as the Gang of Four) and have been applied to countless object-oriented
languages. Part of the appeal of design pa tterns is that they can be used uniformly over many
different languages and syntaxes. The basic structure stays the same; only the details change.
It is fairly easy, for instance, to take a pattern implemented in Java and convert it to C++.
The same cannot be said of JavaScript. While all of the same capabilities exist, they are
often not official parts of the language and must be emulated through obscure tricks and
unintuitive techniques. Over the years, people have discovered ways of using the language to
accomplish tasks never imagined by its creators. We must do likewise to implement common
object-oriented features.
This book collects and documents those tricks and techniques. In the first part, we create
a base of object-oriented features that we can build upon to implement specific design patterns.
The second part deals with specific design patterns and how they can be used in the JavaScript
language.
We took great pains to make the examples in each chapter as practical as possible. We
tried to list some of the most common tasks performed by JavaScript programmers, and then
used design patterns to make them more modular, efficient, and easily maintained. When we
do venture into more theoretical examples, it is done to illustrate a specific point. We know
that at the end of the day, the value of this book will be judged by its relevance to your everyday
tasks and projects. ...展开收缩
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