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Dynet.js
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Dynet.js
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// Constants
const IN = 0;
const HIDDEN = 1;
const OUT = 2;
// Available activation functions
const SIGMOID = 0;
const TANH = 1;
function sigmoid(x) {
return 1 / (1 + exp(-x));
}
// Clones an object
// Found from https://stackoverflow.com/questions/728360/how-do-i-correctly-clone-a-javascript-object
function clone(obj) {
var copy;
// Handle the 3 simple types, and null or undefined
if (null == obj || "object" != typeof obj) return obj;
// Handle Date
if (obj instanceof Date) {
copy = new Date();
copy.setTime(obj.getTime());
return copy;
}
// Handle Array
if (obj instanceof Array) {
copy = [];
for (var i = 0, len = obj.length; i < len; i++) {
copy[i] = clone(obj[i]);
}
return copy;
}
// Handle Object
if (obj instanceof Object) {
copy = {};
for (var attr in obj) {
if (obj.hasOwnProperty(attr)) copy[attr] = clone(obj[attr]);
}
return copy;
}
throw new Error("Unable to copy obj! Its type isn't supported.");
}
// Represents a connection between layers
class Connection {
constructor(layerFrom, layerTo, weight) {
this.layerFrom = layerFrom;
this.layerTo = layerTo;
this.weight = weight;
}
}
// Represents a single neuron
class Neuron {
constructor() {
this.connections = [];
this.outGoing = 0;
this.outGoingConnections = [];
this.value = 0;
this.bias = 0;
}
addConnection(layerFrom, indexFrom, weight) {
this.connections.append(Connection(layerFrom, indexFrom, weight));
}
}