From: Xavier Noria <fxn@...>
Date: 2007-01-28T09:03:12+09:00
Subject: Re: Question about digits

On Jan 28, 2007, at 12:35 AM, CHubas wrote:

> While playing a little with Ruby, I've been looking for a function
> each_digit, or something similar, and I couldn't find any (standard
> nor library). I think it'd be useful to have a function like that.
> It's pretty simple to implement one for Integers
>
> class Integer
>     def each_digit(base = 10, &block)
>         return if zero?
>         (self/base).each_digit(base, &block)
>         yield self % base
>     end
> end
>
> A first approach. Of course, it would be a little more complicated for
> negatives and Floats, specially dealing with precision.

Good. I'd expect each_digit to return strings though, since a digit  
is a symbol, not a number:

   class Integer
     def each_digit(base=10)
       abs.to_s(base).each_byte do |b|
         yield b.chr
       end
     end
   end

-- fxn