From: Ryan Davis <ryand-ruby@...>
Date: 2012-03-28T02:23:22+09:00
Subject: Re: sort array of strings with integers


On Mar 27, 2012, at 09:45 , Ryan Davis wrote:

> 
> On Mar 27, 2012, at 00:59 , Ri Houjun wrote:
> 
>> i have this array
>> 
>> b=[a1 a3 a2 a4 a7 a6 a5 a8 a9 a10]
>> 
>> why is it when I perform b.sort!
>> the result is:
>> b=[a1 a10 a2 a3 a4 a5 a6 a7 a8 a9]
>> 
>> how can i make it
>> b=[a1 a2 a3 a4 a5 a6 a7 a8 a9 a10]
> 
> p Dir["f*.txt"].sort
> # => ["f0.txt", "f1.txt", "f10.txt", "f11.txt", ..., "f2.txt", "f3.txt", ...]
> 
> class Array
>  def human_sort
>    sort_by { |item| item.to_s.split(/(\d+)/).map { |e| [e.to_i, e] } }
>  end
> end
> 
> p Dir["f*.txt"].human_sort
> # => ["f0.txt", "f1.txt", "f2.txt", "f3.txt", "f4.txt", "f5.txt", "f6.txt", ...]

from:

http://blog.zenspider.com/blog/2012/01/array-natural_sort.html