--8323328-832260909-1095707526
8837
Content-Type: MULTIPART/MIXED; BOUNDARY="8323328-832260909-1095707526=:18837"

  This message is in MIME format.  The first part should be readable text,
  while the remaining parts are likely unreadable without MIME-aware tools.

--8323328-832260909-1095707526
8837
Content-Type: TEXT/PLAIN; charset=X-UNKNOWN; format=flowed
Content-Transfer-Encoding: QUOTED-PRINTABLE

On Mon, 20 Sep 2004, [ISO-8859-1] Kristian Søòensen wrote:

> Hi!
>
> Is there some way of writing e.g. a hash table to the filesystem, and read
> it again? - Without having to parse in and output (and create the table all
> over).
>
> I need to store some information, which could be storred in a small database
> (like sqlite - but I can't get ruby-sqlite installed proporly, if sqlite is
> not installed in the default location). Is there an interface to the Berkley
> DB (www.sleepycat.com)?
>
>
> Best regards,
> Kristian Søòensen.

yes.  yes.


   jib:~ > cat a.rb
   require 'pstore'

   db = PStore::new 'db'

   this_time = Time::now
   last_time = nil

   db.transaction do
     if db.root? 'time'
       last_time = db['time']
     end
     db['time'] = this_time
   end


   puts "this_time <#{ this_time }>"
   puts "last_time <#{ last_time }>"

   jib:~ > ruby a.rb
   this_time <Mon Sep 20 13:05:29 MDT 2004>
   last_time <>

   jib:~ > ruby a.rb
   this_time <Mon Sep 20 13:05:33 MDT 2004>
   last_time <Mon Sep 20 13:05:29 MDT 2004>

   jib:~ > ruby a.rb
   this_time <Mon Sep 20 13:05:38 MDT 2004>
   last_time <Mon Sep 20 13:05:33 MDT 2004>



   jib:~ > cat b.rb
   require 'bdb'

   db = BDB::Btree.open "bdb", nil, BDB::CREATE, 0644

   this_time = Time::now
   last_time = nil

   last_time = db['time']
   db['time'] = this_time

   puts "this_time <#{ this_time }>"
   puts "last_time <#{ last_time }>"

   db.close

   jib:~ > ruby b.rb
   this_time <Mon Sep 20 13:10:55 MDT 2004>
   last_time <>

   jib:~ > ruby b.rb
   this_time <Mon Sep 20 13:10:56 MDT 2004>
   last_time <Mon Sep 20 13:10:55 MDT 2004>

   jib:~ > ruby b.rb
   this_time <Mon Sep 20 13:11:01 MDT 2004>
   last_time <Mon Sep 20 13:10:56 MDT 2004>


regards.

-a
--
===============================================================================
| EMAIL   :: Ara [dot] T [dot] Howard [at] noaa [dot] gov
| PHONE   :: 303.497.6469
| A flower falls, even though we love it;
| and a weed grows, even though we do not love it. 
|   --Dogen
===============================================================================
--8323328-832260909-1095707526
8837--
--8323328-832260909-1095707526
8837--