orrgal1

function Productable(arr) {
  const self = {
    array: arr.map(e => Array.isArray(e) ? e : [e]),
    product: (otherArr) => {
      const newArray = [];
      self.array.forEach(e => {
        otherArr.forEach(oe => {
          newArray.push([...e, oe]);
        });
      });

orrgal1

// a work in progress...

const autoBind = require('auto-bind');

/**
 * A Tree of decision making executable nodes.
 */
class Tree {
	/**
	 * @constructor {String} name.

orrgal1

//get a random weighted element in O(n) time and O(n) space
const randomWeightedElement = (elems, weightFn) => {
  if(!elems || !elems.length) return;
	const weighted = [];
	let sum = 0;
	for (let elem of elems) {
		const weight = weightFn(elem);
		if (weight > 0) {
			sum += weight;
			weighted.push({ elem, boundary: sum });