From: "marcandre (Marc-Andre Lafortune)" Date: 2012-07-02T12:07:09+09:00 Subject: [ruby-core:46097] [ruby-trunk - Feature #6670] str.chars.last should be possible Issue #6670 has been updated by marcandre (Marc-Andre Lafortune). Hi, trans (Thomas Sawyer) wrote: > This issue might also have some relation to the issue about Enumerable#size, #6636. Not directly. Being able to calculate lazily a size does not mean it is easy to have random access, and the api I propose would be quite a bit more complicated if it was to allow for random access. I feel that the lack of #last is a good thing. It's there to remind you that it might be expensive, and that (for example) it would be worth storing in a local var instead of calling it twice... ---------------------------------------- Feature #6670: str.chars.last should be possible https://bugs.ruby-lang.org/issues/6670#change-27702 Author: yhara (Yutaka HARA) Status: Assigned Priority: Normal Assignee: matz (Yukihiro Matsumoto) 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/