如何在ruby中初始化一个模块类？

Question

我有这样

module urlfetch 
    class fetch 

    def initialize(url) 
     @url = url 
     analyze! 
    end 

    #extra methods goes here 

    end 
end 

模块我尝试这样

response = urlfetch::fetch("http://google.com") 
puts response 

，但我发现错误，如undefined method fetch

Answer 1

类和模块在红宝石由大写名称定义，以便

module Urlfetch 
    class Fetch 

    def initialize(url) 
     @url = url 
     analyze! 
    end 

    #extra methods goes here 

    end 
end 

则经由new方法初始化类

response = Urlfetch::Fetch.new("http://google.com") 
puts response 

Answer 2

首先，模块和类应当资本化，作为常数。其次，你需要new来构造一个对象。

URLFetch::Fetch.new("http://google.com")