From: Stefano Crocco <stefano.crocco@...>
Date: 2007-04-26T17:13:40+09:00
Subject: Re: does Object#to_enum exist?

Alle gioved� 26 aprile 2007, Dan Zwell ha scritto:
> Hi, all.
>
> I saw someone post a snippet of code that turned an object (with some
> sort of "each" method) into an enumerable. It looked really neat, until
>
> I tried:
>  >> "abcdef".to_enum(:each_byte)
>
> NoMethodError: undefined method `to_enum' for "abcdef":String
>          from (irb):1
>
>
> I looked it up and ri seems to think I have Object#to_enum. The
> underlying code is c, so frankly, I don't understand it. Even running
> the examples from the documentation or looking at Object.new.methods, I
> see nothing about this elusive method. Does anybody have any insight?
> (I'm using ruby 1.8.6.)
>
> Thanks,
> Dan

You need to require 'enumerator'. Doing this will result in the to_enum method 
to be added to the Kernel module and to class Object, which mixes Kernel in. 
For example

require 'enumerator'

"abcdef".to_enum(:each_byte).each{|b| puts b.chr}
a
b
c
d
e
f

I hope this helps

Stefano