layerParametersInit.swift

class Layer {

    ...

    var weights: Matrix!
    var biases: Matrix!

    var previousLayer: Layer?
    var nextLayer: Layer?

    func initialize(previous: Layer?, next: Layer?) {
        if let previous = previous {
            weights = Matrix(random: Shape(rows: size, columns: previous.size), multiplier: 0.01)
            biases = Matrix(zeros: Shape(rows: size, columns: 1))
        }
        previousLayer = previous
        nextLayer = next
    }
}