From: Aleksey V Zapparov <ixti@...>
Date: 2012-07-16T07:25:08+09:00
Subject: Re: How to iterate over nested hashes?

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On Mon, 16 Jul 2012 05:36:29 +0900
"Andrew S." <lists@ruby-forum.com> wrote:

> Hi,
>=20
> I have a data structure like this:  {1=3D>{"foo"=3D>["bar", "baz"]}}
>=20
> ...and I can iterate over it with this:
>=20
> c.values.each do |foo|
>   foo.values.each do |bar|
>     bar.each do |baz|
>       p baz
>     end
>   end
> end
>=20
> But why can't I do this? (fails):
>=20
> c.values.each.values.each.each do |foo|
>   p foo
> end
>=20
> Any help much appreciated!
>=20

You can do something like this (just an idea)

module Enumerable
  def recursive_each &block
    (respond_to?(:each_value) ? each_value : each).each do |v|
      if v.respond_to? :recursive_each
        v.recursive_each(&block)
      else
        yield v
      end
    end
  end
end


c =3D {1=3D>{"foo"=3D>["bar", "baz"]}}

c.recursive_each do |v|
  puts v
end


--=20
Sincerely yours,
Aleksey V. Zapparov A.K.A. ixti
FSF Member #7118
Mobile Phone: +34 677 990 688
Homepage: http://www.ixti.net
JID: zapparov@jabber.ru

*Origin: Happy Hacking!

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