From: David Mullet <david.mullet@...>
Date: 2007-11-01T07:36:42+09:00
Subject: Re: Sorting a string...

Daniel Waite wrote:
> I was porting a small Python script over to Ruby and realized Ruby does
> not sort strings as I expected it would.
> 
> 'cba'.sort # ["cba"]
> 
> So I wrote this...
> 
> class String
> 
>   def sort
>     bytes = Array.new
>     self.each_byte { |byte| bytes << byte }
>     bytes.sort.collect { |byte| byte.chr }.join
>   end
> 
> end
> 
> 'cba'.sort # "abc"
> 
> It's fairly clean, but I don't like the bytes = and self.each_byte bits.
> It feels like there should be a way to say something like...
> 
> self.each_byte(&:collect).sort.collect { |byte| byte.chr }.join
> 
> Or something like that. I think some of the frustration comes from
> Python seemingly being able to do this "out of the box." Unless, of
> course, the following Python code generates an array of single
> characters and not a single array with two strings (in which case Ruby
> CAN do the same):
> 
> letters = list(state1 + state2) # I assume this is [ s1, s2 ]
> letters.sort()
> key = "".join(letters)
> 
> Any ideas?

class String
  def sort
    self.split('').sort.join
  end
end

'cba'.sort   #=> "abc"

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