map translation, sigmoid conversion, basic nuron implemntation

.js

const map = (a, b, c, d) => (x) => (x-a)/(b-a) * (d-c) + c

const sigmoid = (x) => 1 / (1 + Math.exp(-x))
const nuron = (weights = [], bias = 0, ...inputs) => sigmoid(
	inputs
		.map((input, index) => input*weights[index])
		.reduce(((sum, current) => sum+current), bias)
)