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/**
* An implementation of an 'enzymatic programming' paradigm.
*/
DEBUG = true;
DEBUG = false;
Substrate = function(name_) {
this.name_ = name_;
this.items = [];
this.zymes = [];
this.currUid = 1;
};
Substrate.prototype = {
addItem: function(item) {
if (!item.__uid__) {
item.__uid__ = this.currUid;
this.currUid ++;
}
this.items.push(item);
},
addZyme: function(zyme) {
var name_ = '?';
if (typeof zyme == 'string') {
name_ = zyme;
zyme = arguments[1];
}
zyme.name_ = name_;
this.zymes.push(zyme);
if (!zyme.select) zyme.select = Zyme.prototype.select;
if (!zyme.process) zyme.process = Zyme.prototype.process;
},
solve: function() {
print("// Solving " + this.name_ + "...");
var startTime = Date.now();
var midTime = startTime;
var that = this;
function midComment(force) {
var curr = Date.now();
if (curr - midTime > 1000 || force) {
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.');
}
// Naive solver - sheer brute force.
// Assumes list of Zymes is non-changing.
var results = [];
while (true) {
dprint('enzymatic', "Cycle start, " + this.items.length + " items.");
var hadProcessing = false;
for (var z = 0; z < this.zymes.length; z++) {
midComment();
var zyme = this.zymes[z];
var selected = zyme.select(this.items);
if (selected.length > 0) {
if (DEBUG) print("Calling: " + (zyme.processItem ? zyme.processItem : zyme.process));
if (DEBUG) {
try {
print("Inputs: \n---\n\n" + outputs.map(JSON.stringify).join('\n\n') + '\n\n---');
} catch(e) {
print("Inputs: \n---\n\n" + outputs + '\n\n---');
}
}
hadProcessing = true;
var outputs;
try {
dprint('Processing using ' + zyme.name_ + ': ' + selected.length + ' items out of ' + this.items.length);
//PROF(true);
outputs = zyme.process(selected);
//PROF();
} catch (e) {
print("Exception, current selected are: " + selected.map(dump).join('\n\n'));
print("Stack: " + dump(new Error().stack));
throw e;
}
if (DEBUG) {
try {
print("Outputs: \n---\n\n" + outputs.map(JSON.stringify).join('\n\n') + '\n\n---');
} catch(e) {
print("Outputs: \n---\n\n" + outputs + '\n\n---');
}
}
if (outputs.length === 1 && outputs[0].__finalResult__) {
if (DEBUG) print("Solving complete: __finalResult__");
delete outputs[0].__finalResult__; // Might recycle this
delete outputs[0].__uid__;
finalComment();
return outputs[0];
}
results = results.concat(outputs.filter(function(output) { return !!output.__result__; }))
var nonResults = outputs.filter(function(output) { return !output.__result__; });
var keptUids = {};
for (var i = 0; i < nonResults.length; i++) {
var s = nonResults[i];
if (s.__uid__) {
keptUids[s.__uid__] = true;
} else {
this.addItem(s);
}
}
var droppedUids = {};
for (var i = 0; i < selected.length; i++) {
var s = selected[i];
if (!keptUids[s.__uid__]) droppedUids[s.__uid__] = true;
}
this.items = this.items.filter(function(item) {
if (!droppedUids[item.__uid__]) {
return true;
} else {
delete item.__uid__;
}
});
//midComment(true);
}
}
if (this.items.length === 0) {
if (DEBUG) print("Solving complete: no remaining items");
finalComment();
results.forEach(function(output) {
delete output.__result__; // Might recycle these
delete output.__uid__;
});
return results;
}
if (!hadProcessing) {
print("Reached a dead end.");
this.items.forEach(function(item) {
print("remaining item:" + dump(item));
});
throw "failure";
}
midComment();
this.items = this.items.filter(function(item) { return item !== null; });
}
},
};
Zyme = function() { };
Zyme.prototype = {
select: function(items) {
return items.filter(this.selectItem, this);
},
process: function(items) {
var ret = [];
for (var i = 0; i < items.length; i++) {
var item = items[i];
try {
ret = ret.concat(this.processItem(item));
} catch (e) {
print("Exception in process(), current item is: " + dump(item));
throw e;
}
}
return ret;
},
processPairs: function(items, func) {
var ret = [];
for (var i = 0; i < items.length; i += 2) {
try {
ret = ret.concat(func(items[i], items[i+1]));
} catch (e) {
print("Exception in processPairs(), current items are: " + dump(items[i]) + ' :::: ' + dump(items[i+1]));
throw e;
}
}
return ret;
},
};
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