constructor.js

function Hand() {
  this.cards = [];
  this.score = function () {

    var i;
    var total = 0;

    for (i = 0; i < this.cards.length; i++) {
      if (this.cards[i].rank === "A") {
        total++;
      }
      else if (this.cards[i].rank === "J" || this.cards[i].rank === "Q" ||
        this.cards[i].rank === "K") {
        total += 10;
      }
      else {
        total += parseInt(this.cards[i].rank, 10);
      }
    }
    // Now change aces to 11 if possible
    for (i = 0; i < this.cards.length; i++) {
      if (this.cards[i].rank === "A" && total <= 11) {
        total += 10;
      }

    }
    return total;
  }
}