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/**
* A 2nd implementation of an 'enzymatic programming' paradigm.
*/
Zyme2 = function(reqs, func) {
//! List of items that we want. Each element in this list is
//! a list of features, we want elements that have them all.
//! We will only call this Zyme if we find *all* of the items
//! it wants.
this.reqs = reqs;
this.process = func;
};
Substrate2 = function(name_) {
this.name_ = name_;
this.elems = {};
this.currUid = 1;
};
Substrate2.prototype = {
_addElement: function(elem) {
elem.__uid__ = this.currUid;
this.elems[elem.__uid__] = elem;
this.currUid ++;
},
_removeElement: function(elem) {
assertTrue(!!this.elems[elem.__uid__]);
this.elems[elem.__uid__] = null;
delete elem.__uid__;
},
_getElement: function(uid) { return this.elems[uid]; },
getItems: function() {
return values(this.elems).filter(function(elem) { return elem.isItem });
},
getZymes: function() {
return values(this.elems).filter(function(elem) { return elem.isZyme });
},
addItem: function(item) {
this._addElement(item);
item.isItem = true;
this.getZymes().forEach(function(zyme) { this.noticeItem(zyme, item) });
},
addZyme: function(zyme) {
this._addElement(zyme);
zyme.isZyme = true;
zyme.potentials = zyme.reqs.map(function() { return [] }); // for each required item, a list of matching items
this.getItems().forEach(function(item) { this.noticeItem(zyme, item); });
},
removeItem: function(item) {
this.getZymes().forEach(function(zyme) { this.forgetItem(zyme, item) });
this._removeElement(item);
delete item.__result__;
delete item.__finalResult__;
},
removeZyme: function(zyme) {
this._removeElement(zyme);
},
_getFits: function(zyme, item) {
return fits = zyme.reqs.map(function(req) {
return req.filter(function(feat) { return !item[feat] }).length == 0;
});
},
noticeItem: function(zyme, item) {
loopOn(this._getFits(zyme, item), function(i, fit) {
if (fit) {
zyme.potentials[i].push(item);
}
});
},
forgetItem: function(zyme, item) {
loopOn(this._getFits(zyme, item), function(i, fit) {
if (fit) {
zyme.potentials = zyme.potentials.filter(function(item2) { return item2 !== item });
}
});
},
processAction: function(zyme, items) {
items.forEach(this.removeItem, this);
var splat = splitter(items.length > 1 ? zyme.process(items) : zyme.process(items[0]), function(item) {
return item.__result__ || item.__finalResult__;
});
splat.leftIn.forEach(this.addItem, this);
return splat.splitOut;
},
solve: function() {
print("// Solving " + this.name_ + "...");
var startTime = Date.now();
var midTime = startTime;
var that = this;
function midComment() {
var curr = Date.now();
if (curr - midTime > 1000) {
print('// Working on ' + that.name_ + ', so far ' + ((curr-startTime)/1000).toString().substr(0,10) + ' seconds. Have ' + that.items.length + ' items.');
midTime = curr;
}
}
function finalComment() {
print('// Completed ' + that.name_ + ' in ' + ((Date.now() - startTime)/1000).toString().substr(0,10) + ' seconds.');
}
var results = [];
var done = false;
while (!done) {
var hadProcessing = false;
this.getZymes().forEach(function(zyme) {
while (!done) {
midComment();
var selected = zyme.potentials.map(function(potential) { return potential[0] });
if (sumTruthy(selected) == zyme.reqs.length) {
var outputs = this.processAction(zyme, selected);
hadProcessing = true;
if (outputs.length === 1 && outputs[0].__finalResult__) {
results = outputs;
done = true;
} else {
results = results.concat(outputs);
}
} else {
break;
}
}
}, this);
if (this.items.length === 0) {
finalComment();
done = true;
}
if (!hadProcessing) {
print("Reached a dead end.");
this.getItems().forEach(function(item) {
print("remaining item:" + dump(item));
});
throw "failure";
}
midComment();
}
if (results[0].__finalResult__) {
return results[0];
} else {
return results;
}
},
};
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