Ruby中的方法访问 [英] Method access in Ruby

问题描述

Ruby如何允许隐式允许类之外的类访问方法?

How is it that Ruby allows a class access methods outside of the class implicitly?

示例:

class Candy
    def land
        homer
    end
end

def homer
    puts "Hello"
end

Candy.new.land #Outputs Hello

推荐答案

"homer"方法的定义是将该方法添加到Object类中.它没有定义自由功能.

The definition of the "homer" method is adding the method to the Object class. It is not defining a free function.

Candy类隐式继承自Object，因此可以访问Object中的方法.当您在"land"方法中调用"homer"时，方法解析无法在当前类中找到定义，而是转到超类，找到已添加到Object的方法，然后调用它.

Class Candy implicitly inherits from Object, and so has access to the methods in Object. When you call "homer" in the "land" method, the method resolution can't find a definition in the current class, goes to the super class, finds the method you have added to Object, and calls it.

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