From: 7stud -- <bbxx789_05ss@...>
Date: 2009-07-23T10:24:59+09:00
Subject: Re: why I get an empty hash?

7stud -- wrote:
> 7stud -- wrote:
>> 
>> So you see, the result is the same.  It doesn't matter what you do to 
>> the hash returned by the recursive method calls because you don't do 
>> anyting with the returned hash, so ruby discards it.
>> 
> 
> Your question is like asking why the result of calling this method:
> 
> def meth
>    h = {}
>    {"AA" => 0}
> 
>    return h
> end
> 
> p meth
> 
> 
> is an empty hash.

Which is equivalent to asking why the result of calling meth1 below is 
an empty hash:

def meth1
   h = {}
   meth2

   return h
end

def meth2
  h = {"AA" => 0}
  return h
end

p meth1


Method calls are replaced in your code by the return value of the 
method.  So calling meth1 results in this:


   h = {}
   {'AA' => 0}  #from meth2

   return h

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