From: Chris Shea <cmshea@...>
Date: 2007-03-25T16:45:04+09:00
Subject: Re: adding anotehr each method to String

On Mar 25, 2:20 am, unbewusst.s...@wortanschahung.com.invalid (Une
B�vue) wrote:
> f it doesn't exist allready, i'd like to add another each method to
> String similar to each_byte except it loops over chars for example :
>
> "zero".each_char{|c| puts c}
>
> would print-out :
> z
> e
> r
> o
>
> i know how to add a new method to a given class, what i don't know is
> specifically for methods like each which pass an arg to a given block...
>
> --
> It's easy to play any musical instrument: all you have to do is
> touch the right key at the right time and the instrument will
> play itself. -- J.S. Bach

What you need is "yield".

This does what you need:

class String
  def each_char
    0.upto(self.length - 1) do |x|
      yield self[x,1]
    end
  end
end

yield passes a value to a block.