From: ts <decoux@...>
Date: 2006-05-13T01:09:47+09:00
Subject: Re: Making sense of the various Ruby "eval"s

>>>>> "E" == Eli Bendersky <eliben@gmail.com> writes:

E> I'm struggling to fully understand the difference between the block and 
E> the string versions ?

 the string version is evil :-)

E> OK I think I understand: instance_eval adds instance methods to a class, 

 instance_eval add singleton methods, this is why you can use it with any
 objects (not only class, modules).

E> and class/module_eval adds class methods to a class. But also 

 no, add instance method for a class. This is why you can use it only with
 a class, module.

E> instance_eval can be called on any object, but class_eval can't (it can 
E> be called only on class / module objects). Correct ?

 yes.



Guy Decoux