From: "duerst (Martin Dürst)" <duerst@...>
Date: 2012-11-28T09:38:35+09:00
Subject: [ruby-core:50238] [ruby-trunk - Feature #6670] str.chars.last should be possible


Issue #6670 has been updated by duerst (Martin D��rst).


Instead of this proposal, what about adding some/most/all of the Array methods to Enumerator?

E.g. like so:

module Enumerator
  def [] (pos)
    to_a[pos]
  end
end

Of course, this is just the simplest case of [], and the simplest (and maybe slowest) implementation. This is just an idea, but I think it would be way better than having to distinguish lines/each_line, chars/each_char,... and so on.
----------------------------------------
Feature #6670: str.chars.last should be possible
https://bugs.ruby-lang.org/issues/6670#change-34060

Author: yhara (Yutaka HARA)
Status: Assigned
Priority: Normal
Assignee: yhara (Yutaka HARA)
Category: core
Target version: 2.0.0


=begin
Since str.chars returns an Enumerator, we need explicit to_a for some operations:

  str.chars.to_a.last
  str.chars.to_a[1,3]

But often I forget that and write:

  str.chars.last
  str.chars[1,3]

Besides that, I feel it is hard to explain why to_a is needed here when I'm writing
artilcles for Ruby beginners. 

Simplest way to achieve this is to make String#chars (also #lines, #bytes and #codepoints)
return an Array. Since arrays have most of the methods defined in Enumerator, this will 
not be a big change. For programs like str.chars.next, you can use each_char instead.
=end



-- 
http://bugs.ruby-lang.org/