From: Yukihiro Matsumoto <matz@...>
Date: 2011-11-12T04:02:49+09:00
Subject: [ruby-core:40949] [ruby-trunk - Feature #5607][Feedback] Inconsistent reaction in Range of String


Issue #5607 has been updated by Yukihiro Matsumoto.

Status changed from Open to Feedback

Ruby classes often play several roles, for example, Array can be array, stack or queue, according to usage of methods. Range is similar. A range is a class with starti point and end point (and flag for end-exclusion). You can use it as interval or sequence of iterated objects from start to end.

In most cases (especially for numbers) those two behave same, but for strings, they behave quite differently, you have to care about how to use ranges. The following methods treat ranges as intervals:

 min, max, cover?

The other methods like the following treat ranges as seqeunces:

 ===, each, step, member?, include?, and methods inherited from Enumerable

matz.
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Feature #5607: Inconsistent reaction in Range of String
http://redmine.ruby-lang.org/issues/5607

Author: Yen-Nan Lin
Status: Feedback
Priority: Normal
Assignee: 
Category: 
Target version: 


=begin
When I tried to access excel file, I found some inconsistent behavior about range of string. 

ruby-1.9.3-p0 :001 > ("A".."AB").to_a
 => ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "AA", "AB"]

This behavior is as what I thought.

ruby-1.9.3-p0 :002 > ("X".."AB").to_a
 => []

However, I tried to access "X" to "AB", and its reaction is inconsistent with above example.

I hope that behavior would be consistent in future release.

Thanks!
=end



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