If your purpose is just to save disk space, then I'd suggest just using
compression. Two identical data types should produce the same sequence of
bytes, which are easily compressed. I believe Nippy has a fast compression
via Snappy enabled by default.

- James


On 10 August 2014 19:36, MS <5lvqbw...@sneakemail.com> wrote:

> I'm trying to write an EE schematic capture program in clojure.  I'd like
> to be able to define a prototype component, say a resistor with value=10k,
> then be able to instantiate that many times, with each instance having an
> additional property such as a name string.  It's easy to ensure (identical?
> (proto instance1) (proto instance2)) returns true while in-memory,
> however I'm not sure how to write this out to disk.
>
> It seems the serialization libraries, print-dup, edn, etc., operate on
> values, so reading the database back in won't guarantee it's really the
> same object.  I'd like to have the thing defined *once* then instantiated
> many times, and have this captured in the on-disk version.
>
> Am I barking up the wrong tree?  ie, given immutable data structures,
> there's kind of no point in doing this.  I'm actually trying to save disk
> space, so I'd like to be able to refer in a few characters a potentially
> large structure that was defined earlier.  It would also be nice to have
> this be human readable.
>
> Would one of the JSON serializers do this for me?
>
>
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