From: Yukihiro Matsumoto <matz@...>
Date: 2005-10-19T22:59:11+09:00
Subject: Re: Array.sort when it's items are String inheritors with redefined <=> works like if not redefined

Hi,

In message "Re: Array.sort when it's items are String inheritors with redefined <=> works like if not redefined"
    on Wed, 19 Oct 2005 22:28:29 +0900, MiG <mig@1984.cz> writes:

|Hello,
|  I want to have a string which, if in array, will be sorted like numbers.  
|I wrote this:
|
|-----------------------------------------------------------------------------------------
|
|class String2 < String
|
|     def <=> str2
|         self.to_i <=> str2.to_i
|     end
|
|end
|
|a = [ String2.new('1'), String2.new('10'), String2.new('5') ]
|
|puts a.sort.join(',')

Why not use sort_by, much simpler solution?

  a = ['1', '10', '5']
  puts a.sort_by{|x|x.to_u}.join(',')

							matz.