function map(d) {
  if (d[4] == "." || d[2] == isNaN) {
  }
  if (d[0] === "2015") {
    return {
      yearOne: d[0],
      categorie: d[1],
      product: d[2],
      priceOne: Number(d[4])
    }
  }
  if (d[0] === "2016") {
    return {
      yearTwo: d[0],
      categorie: d[1],
      product: d[2],
      priceTwo: Number(d[4])
    }
  }
}

2015,Foodstuffs,Applesauce,euro,0.86
2015,Foodstuffs,Bananas,euro,1.48
2015,Foodstuffs,Beer,euro,1.48
2016,Foodstuffs,Applesauce,euro,0.84
2016,Foodstuffs,Bananas,euro,1.46
2016,Foodstuffs,Beer,euro,1.49