Function shuffle

boston-housing/data.js:110–126

* Shuffles data and target (maintaining alignment) using Fisher-Yates * algorithm.flab

(data, target)

 * algorithm.flab
 */
function shuffle(data, target) {
  let counter = data.length;
  let temp = 0;
  let index = 0;
  while (counter > 0) {
    index = (Math.random() * counter) | 0;
    counter--;
    // data:
    temp = data[counter];
    data[counter] = data[index];
    data[index] = temp;
    // target:
    temp = target[counter];
    target[counter] = target[index];
    target[index] = temp;
  }
};