From: 7stud -- <bbxx789_05ss@...>
Date: 2009-04-30T16:28:06+09:00
Subject: Re: Defining a default proc for Hash

Srijayanth Sridhar wrote:
> Hello,
> 
> Is there a way to redefine or newly define a default proc for Hash way 
> after
> it has been constructed and populated with elements?
> 
> There seems to be a #default= but no #default_proc=
> 

Did you read this?

---------------------------------------------------------- Hash#default=
     hsh.default = obj     => hsh
------------------------------------------------------------------------
      ....

      It is not possible to set the a default to a
     +Proc+ that will be executed on each key lookup.

       ...

        # This doesn't do what you might hope...
        h.default = proc do |hash, key|
          hash[key] = key + key
        end
        h[2]       #=> #<Proc:0x401b3948@-:6>
        h["cat"]   #=> #<Proc:0x401b3948@-:6>




-- 
Posted via http://www.ruby-forum.com/.