From: ara.t.howard@...
Date: 2006-05-27T04:35:29+09:00
Subject: Re: Marshaling NArray objects.

On Sat, 27 May 2006, Alex Polite wrote:

> On 5/25/06, ara.t.howard@noaa.gov <ara.t.howard@noaa.gov> wrote:
>> 
>> are you sure need it?
>
> yeah. I'm marshaling objects that have narrays as a component among others.
>> 
>>      harp:~ > cat a.rb
>>      require 'narray'
>> 
>>      class NArray
>>        def _dump *ignored
>>          Marshal.dump :typecode => typecode, :shape => shape, :data => to_s
>>        end
>>        def self._load buf
>>          h = Marshal.load buf
>>          typecode = h[:typecode]
>>          shape = h[:shape]
>>          data = h[:data]
>>          to_na data, typecode, *shape
>>        end
>>      end
>> 
>
> Thanks a bunch. That did the trick. Just one more thing. When I load a
> marshalled object I can access the attributes on that object but I can
> call it's methods. This is from irb. I've googled for stuff like
> "marshaling methods" to no avail.
>
> Alex

you must have something else going on, you needn't do anything special to
marshal methods:

     harp:~ > cat a.rb
     require 'narray'
     class NArray
       def _dump *ignored
         Marshal.dump :typecode => typecode, :shape => shape, :data => to_s
       end
       def self._load buf
         h = Marshal.load buf
         typecode = h[:typecode]
         shape = h[:shape]
         data = h[:data]
         to_na data, typecode, *shape
       end
     end

     na = Marshal.load(Marshal.dump(NArray.int(4,2)))

     p na
     na[true, 0] = 42
     p na
     p na.size
     p na.shape


     harp:~ > ruby a.rb
     NArray.int(4,2):
     [ [ 0, 0, 0, 0 ],
       [ 0, 0, 0, 0 ] ]
     NArray.int(4,2):
     [ [ 42, 42, 42, 42 ],
       [ 0, 0, 0, 0 ] ]
     8
     [4, 2]


you'll have to show us your problem - probably you are returning the wrong kind
of object from the class _load method.

regards.

-a
-- 
be kind whenever possible... it is always possible.
- h.h. the 14th dali lama