From: Ara.T.Howard@...
Date: 2004-09-21T06:24:39+09:00
Subject: Re: Store object in on disk / mini database

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On Tue, 21 Sep 2004, Bill Kelly wrote:

> From: "trans. (T. Onoma)" <transami@runbox.com>
>> On Monday 20 September 2004 04:14 pm, Kristian S=C3=B8rensen wrote:
>>> Thanks for both your suggestions! That was just what I needed! :-)
>>
>> There's also YAML.
> [...]
>> Nice thing about YAML is that the file it creates is human readable and
>> editable!
>
> Additionally YAML supports a drop-in PStore equivalent, so if your code
> is already structured to use PStore, you can a YAML::Store the same way.
>
> require 'yaml/store'
>
> ystore =3D YAML::Store.new("my_datafile.ystore")
>
> # use ystore just as you would a pstore:
>
> my_hash =3D {"a"=3D>1, "b"=3D>2}
> my_array =3D %w(dog cat elephant)
>
> # store stuff in the database
>
> ystore.transaction do
>  ystore["my_hash"] =3D my_hash
>  ystore["my_array"] =3D my_array
> end
>
> # print out all keys/values in database
>
> ystore.transaction do
>  ystore.roots.each do |key|
>    puts ystore[key].inspect
>  end
> end
>
>
> # note the above code is untested

yes - yaml is very, very cool - i use it alot for my own code.  a couple of
things to be aware of

   - yaml is alot slower than marshal.  if your db has only 10,000 entries =
or
     so this no problem

   - flock does not work on nfs filesystems (used by pstore an
     yaml::store)

-a
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| 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.=20
|   --Dogen
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