A method that you define at the top level is stored as a private instance method of the Object class.
Defining private instance methods of Object has some interesting implications.
First, these methods not only can but must be called in bareword style.
Second, private instance methods of Object can be called from anywhere in your code, because Object lies in the method lookup path of every class (except BasicObject, but that’s too special a case to worry about). (查看原文)
A protected method is like a slightly kinder, gentler private method. The rule for pro- tected methods is as follows: you can call a protected method on an object x, as long as the default object (self) is an instance of the same class as x or of an ancestor or descendant class of x’s class.
This rule sounds convoluted. But it’s generally used for a particular reason: you want one instance of a certain class to do something with another instance of its class. (查看原文)
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D瓜哥
Manning Publications2014版（其他版本）
0 有用 天平上的尘埃 2019-02-26 14:26:36
工作需要，开始打卡，看多久看完，大概能掌握 ———————————————————————— 陆陆续续用了两个半月的时间读完，确实是一本Ruby入门的好书
0 有用 落跑路人 2025-02-09 21:02:22 上海
感觉不太适合零基础入门
0 有用 No_Kidding~ 2017-09-20 10:24:55
非常有用的工具书
0 有用 近所蓝 2019-10-03 17:36:23
得于Ruby Summit 2018（郑州）。并不像入门读物，因为一开头的章节有点妖，中间又有点像特性介绍。尽管如此，尽管读过Ruby元编程和Ruby原理剖析，但读这本书还是有收获，最后三章举例子讲动态和元编程，有很多启发，比如call_original和method_added。[1909]
0 有用 lion.jarvis 2023-08-17 01:46:56 日本
1. 可能是目前为止最好/新一本讲 Ruby 的书 2. 翻译有点生硬，有点不分主次啰啰嗦嗦。