On Mon, Jan 3, 2011 at 1:40 PM, MS <5lvqbw...@sneakemail.com> wrote:
> Hi, I'm new to clojure (though I've messed around in scheme a little)
> and I'm trying to represent an electrical circuit with "pins" and
> "nets" (ie in graph terminology vertices and edges).
>
> I'd like to represent the nets as {:name "net_name" :pins #{pin1 pin2
> pin3}} etc.
> I'd like to represent each pin as {:name "pin_name" :net the_net :type
> pin_type}
>
> I want to query the net for all its attached pins, and to query any
> pin to see what net it's attached to. The problem here is that these
> are mutually-referring things. The net refers to the pins and each
> pin refers back to the net.
>
> How do I create these without mutation?
I'd recommend something like this:
{"pin_name1" {:name "pin_name1" :net "net_name1" :type ...}
"pin_name2" {:name "pin_name2" :net "net_name1" :type ...}
"pin_name3" {:name "pin_name3" :net "net_name1" :type ...}
{"net_name1" {:name "net_name1"
:pins #{"pin_name1" "pin_name2" "pin_name3"}}
Each one refers not directly to others, but simply to Strings. Which
can be used to look the others up in the two master hash maps.
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