Another implementation of getRandosFromArray, using an efficient shuffle function

Utils.2.1.js

export const getRandosFromArray = function(arr, numRandos){
  let arrClone = arr.slice(0)
  let shuffled = shuffle(arrClone)
  let randos = shuffled.slice(0, numRandos)
  return randos
}

// https://bost.ocks.org/mike/shuffle/
const shuffle = function(array) {
  var m = array.length, t, i;

  // While there remain elements to shuffle…
  while (m) {

    // Pick a remaining element…
    i = Math.floor(Math.random() * m--);

    // And swap it with the current element.
    t = array[m];
    array[m] = array[i];
    array[i] = t;
  }

  return array;
}