He has a base camp in Bologna, Italy. He loves Ruby. 原文摘录 ··· ( 全部 ) Module#constants方法返回当前范围内的常量; Module.constants方法返回当前程序中所有顶级常量;使用load() 方法有一个副作用。motd.rb 文件很可能定义了变量和类。尽管变量在加载完成后会落在当前作用域之外,但常量不会。这样...
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–Metaprogramming Ruby In Ruby, it seems, metaprogramming is used more often than in other dynamically typed languages, especially in Rails, for example: Path and URL Helpers. The downside of dynamic metaprogramming is that there is no source code for the “thing”: you see a function, but ...
这里我们看到我们reopen了String这个build-in的class,而且添加了一个新的方法say_hello(.NET 3.5中通过扩展方法也实现了这个特性,但ruby的实现更加自然和灵活)这样使得ruby语言自身提供了很大的可扩展性,而这种从编程语言层面提供的可扩展性为好处体现在两个方面。 第一,对于ruby语言自身,在其以后的版本中可以对原有...
We will illustrate the metaprogramming technique in Ruby and Python, then write some infrastructure code that enables us to use the same kind of metaprogramming technique in C# through the DLR. The infrastructure code will consist of two classes called ClassMetaObject and ExpandoClass....
This completely revised new edition covers the new features in Ruby 2.0 and 2.1, and contains code from the latest Ruby libraries, including Rails 4. Most examples are new, “from the wild,” with more recent libraries. And the book reflects current ideas of when and how much metaprogramming...
Sign in Metaprogramming Rubyby Sidu Ponnappa Srushti Code that writes code. Add more powerful abstractions and reduce duplication through Ruby that writes Ruby!Start Course Introduction 01. Being Meta Dynamic Methods 00. Just what does #send do? 01. Method Missing 02. Define Method Code...
Metaprogramming Ruby P30 In a sense, the class keyword in Ruby is more like a scope operator than a class declaration.
最簡單的 Metaprogramming in Ruby,就是 attr_reader, attr_writer, attr_accessor。 在Ruby 裡所有的 instance variable 都是必須用 getter 和 setter 來存取。attr_xxxx 就是用來生成這些 getter 和 setter 的。 http://www.javaworld.com.tw/jute/post/view?bid=14&id=146712&sty=3 ...
What is the basic concept of metaprogramming in Ruby? Metaprogramming in Ruby is a coding technique that allows developers to write code that writes other codes. It’s a way of programming a computer program to have the ability to treat its own code as data, which it can manipulate. This...