From: Robert Dober <robert.dober@...>
Date: 2006-03-24T18:40:11+09:00
Subject: Re: How to Iterate over nested Hashes ?

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Something like this might work

---------------------------------- 8< --------------------------
#!/usr/bin/env ruby

testhash =3D {
:outside =3D> 1,
"recipeKey"=3D>{"title"=3D>"RailsBook", "category_id"=3D>"1",
"description"=3D>"This is a book about Rails", "instructions"=3D>"Read It",
  "author" =3D> { :name =3D> "Robert", :email =3D> "<robert.dober@gmail.com=
>" }
},
:out_again =3D> true

}

def traverse( aHash, level =3D 0 )
    aHash.each do
        |k, v|
        puts "%s%s:%s" % [ "   " *level, k,
                v.kind_of?(Hash) ? traverse( v, level + 1) : v
                ]
    end # do
    ""
end # def traverse(

traverse testhash
---------------------------------- >8 --------------------------

hope that helps

Robert
On 3/24/06, Dinesh Dinesh <u_dinesh@yahoo.com> wrote:
>
> Hi,
>
> I'm new to Ruby. I want to know how to iterate over a nested hash as
> below.
>
>
> *************************************************************************=
****
> testhash =3D {
>
> "recipeKey"=3D>{"title"=3D>"RailsBook", "category_id"=3D>"1",
> "description"=3D>"This is a book about Rails", "instructions"=3D>"Read It=
"}
>
> }
> testhash.each {|key, value| print key, " value  is : ", value, "\n" }
>
> Here is the output i get..
>
> =3D=3D> recipeKey value  is : titleRailsBookdescriptionThis is a book abo=
ut
> Railscategory_id1instructionsRead It
>
> *************************************************************************=
****
>
> As per the input "testhash", the value itself is a hash rt with keys as
> "title","category_id","description" and "instructions"? Now how to get
> these values as a key/value pair ??
>
> If we apply "eash" operator for "testhash", the values are getting
> printed "continously  string" as shown above???, is this the expected
> behaviour?
>
> I tried to assign this value into a "new hash" variable and when i
> applied "each" on this varibale, it said "each" varible undefined, the
> reason may be that the value which i assinged is not a hash? so wanted
> to know how to iterate the above  nested hash ? Please help  me out.
>
> Thank You..
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


--
Deux choses sont infinies : l'univers et la b=EAtise humaine ; en ce qui
concerne l'univers, je n'en ai pas acquis la certitude absolue.

- Albert Einstein

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