code: private void normalize() {
  		for(int i = 0; i < vocab.size(); ++i) {
  			double len = 0;
  			for(int j = i * layerSize; j < (i + 1) * layerSize; ++j)
  				len += vectors.get(j) * vectors.get(j);
  			len = Math.sqrt(len);
  
  			for(int j = i * layerSize; j < (i + 1) * layerSize; ++j)
  				vectors.put(j, vectors.get(j) / len);
  		}
  	}
docs: Normalizes the vectors in this model