Matrix.substract doesn't work with Matrix and Array

[bbars]

multi-layer-neural-network/js/neuralnetwork.js

Line 48 in 2578278

error = Matrix.substract(targets, outputs);

Matrix.substract(targets, outputs) does its work on { Matrix, Matrix } and { Matrix, any (number?) }.
But it breaks things down when called with { Matrix, Array } as an arguments, which is called from the NeuralNetwork::train method:

multi-layer-neural-network/js/neuralnetwork.js

Lines 35 to 48 in 2578278

	train(inputArray, targetArray) {
	const inputs = Matrix.from_arr(inputArray);
	const outputs = this.predict(inputArray);
	const targets = Matrix.from_arr(targetArray);
	let prevError = null;
	for(let i = this.layers.length - 1; i >= 0; i--) {
	const layer = this.layers[i];
	let error;
	if(!prevError) {
	error = Matrix.substract(targets, outputs);

PS also there's a typo in a word subStract