From: Dinesh Umanath <u_dinesh@...>
Date: 2006-03-24T19:28:04+09:00
Subject: Re: How to Iterate over nested Hashes ?

Hi Robert,

Thank a LOT for the quick reply. Sorry for not making it clear when i
have posted it.

What i was looking is, if the "value" is a hash, then i want to assign
this value to another hash variable, so that upon iterating that hash
variable i should see the key/value pairs of this new value.

In our case even though the "value" was a hash i think while iterating
it gets converted to string and it is  printing as "continious string".

I was thinking that if i create a new hash and assign the "value" (which
is a hash) to this new hash, then i can iterate it.  But what i feel is
as you have mentioned we have to use some thing like "traverse" which
you have written to manipulate it.

So Is there any built-in "methods" to take care of situations like this
(nested - nested hash) than writing our own "traverse" methods like this
?

Again thanks for your quick and kind reply.

Dinesh

Robert Klemme wrote:
> Dinesh Dinesh wrote:
>> 
>> "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?
> 
> Yes, it's the result of a hash converted to string.
> 
>> 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?
> 
> "each" is a method not a variable.
> 
>  > so wanted
>> to know how to iterate the above  nested hash ? Please help  me out.
> 
> First of all you should describe what you want to see during the
> iteration.  Do you only want to see key value pairs of nested hashes?
> Do you want to see key1,key2,value?
> 
> If you just want to print the whole Hash you can use pp:
> 
>  >> require 'pp'
> => true
>  >> testhash = {
> ....
>  >> pp testhash
> {"recipeKey"=>
>    {"title"=>"RailsBook",
>     "description"=>"This is a book about Rails",
>     "category_id"=>"1",
>     "instructions"=>"Read It"}}
> 
> Kind regards
> 
> 	robert


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