From: Adam Prescott <adam@...>
Date: 2013-05-13T20:23:35+09:00
Subject: Re: Enum#each issue

On 13 May 2013 12:16, Love U Ruby <lists@ruby-forum.com> wrote:
>
> so.rb:2:in `each': undefined method `each' for "string":String
> (NoMethodError)
>   from so.rb:2:in `<main>'
>

String doesn't have an #each method, as the documentation will point
out (and String doesn't include Enumerable or anything).
Object#to_enum makes #to_enum available to all String instances, and
defaults to the method #each:
http://www.ruby-doc.org/core-1.9.3/Object.html#method-i-to_enum

Since the Enumerator wrapper around "string" is lazy, there is no
error with "string".to_enum, but that doesn't mean String#each doesn't
exist.

You might look at, for example, #bytes/#each_byte, #chars/#each_char
or #lines/#each_line (among others) to iterate over different
manifestations of the string's data.