You know the wee

package next

class Neuron(size: Int) {

    var spin: Double = 1.0
    var weights: DoubleArray = DoubleArray(size, { _ -> 0.0})
    var bias: Int = 0

    fun updateSpin(spins: List<Double>): Boolean {
        val value: Double = weights.indices.sumByDouble { weights[it] * spins[it] + bias }
        val oldSpin = spin
        spin = if (value >= 0) 1.0 else -1.0
        return spin != oldSpin
    }
}