I've been thinking about dataflow-paradigm languages. Events would make for a handy way to deal with edges.

BlackBox.js

EE = require('events').EventEmitter

//edges isn't well-thought-out. I want to be able to hold it as a string but treat it as a pointer. :/
// I could also make edges contain both a name *and* an EE-/type/ object, for more flex. Might be The Way.
function BlackBox(fxn, edges) {
    blackbox = new EE;
    blackbox.input = [none, none];
    blackbox.edges = edges;
    blackbox.on('input' function(index,val) {
        if ( index < input.length() ) {
            inputVals[index] = val;
        } else {
            console.log("WARNING: Something somewhere thinks there are more inputs than there should be.");
        }
        //Checks to make sure all values in input are defined
        if ((input[0] !== undefined && (input[1] !== undefined)) {
            outs = fxn.apply(this,input);
            if ( index < edges.length() ) {
                edges.forEach( function(edge, index) {
                    edge.emit('input', outs[index]);
                });
            } else {
                console.log("WARNING: Something somewhere thinks there are more outputs than there should be.");
            }
        }
    });   

    //For graphviz
    blackbox.dot = g(edges);
    return blackbox;
}