let mapStrike = function(frame) {
  return frame.map(frameThrow => (frameThrow == 'X')
    ? 10
    : frameThrow);
};

let expandStrike = function(frame, i, arr) {
  if ((frame[0] == 10) && (i < 9)) {
    if ((frame[1] == undefined) && (frame[2] == undefined)) {
      nextFrame = arr[i + 1];
      frame[1] = nextFrame[0];
      if ((nextFrame[0] == 10) && (i < 8)) {
        nextFrame = arr[i + 2];
        frame[2] = nextFrame[0];
      } else {
        frame[2] = nextFrame[1];
      }
    }
  }

  return frame;
};

let mapSpare = function(frame) {
  return frame.map((frameThrow, i, arr) => (frameThrow == '/')
    ? (10 - arr[0])
    : parseInt(frameThrow));
};

let expandSpare = function(frame, i, arr) {
  if (((frame[0] + frame[1]) == 10) && (i < 10)) {
    nextFrame = arr[i + 1];
    if (frame[2] == undefined) {
      frame[2] = nextFrame[0];
    }
  }

  return frame;
};

let scoreFrame = function(frame) {
  return frame.reduce((acc, frameThrow) => acc + frameThrow, 0);
}

let calculateScore = function(frames) {
  frames = frames.map(frame => frame.split(/,?/));
  frames = frames.map(mapStrike);
  frames = frames.map(mapSpare);
  frames = frames.map(expandStrike);
  frames = frames.map(expandSpare);
  frames = frames.map(scoreFrame);

  return frames.reduce((acc, frame) => acc + frame, 0);
}

let result;

result = calculateScore(["X", "X", "X", "X", "X", "X", "X", "X", "X", "XXX"]);
console.log(300, result);
result = calculateScore(["X", "X", "X", "X", "X", "X", "X", "X", "X", "XX9"]);
console.log(299, result);
result = calculateScore(["9,/", "9,/", "9,/", "9,/", "9,/", "9,/", "9,/", "9,/", "9,/", "9,/,9"]);
console.log(190, result);
result = calculateScore(["1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/,1"]);
console.log(110, result);
result = calculateScore(["1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/", "1,/,1"]);
console.log(110, result);
result = calculateScore(["X", "9,/", "X", "9,/", "X", "9,/", "X", "9,/", "X", "9,/,X"]);
console.log(200, result);
result = calculateScore(["X", "9,/", "X", "9,/", "X", "9,/", "X", "9,/", "X", "9,/,X"]);
console.log(200, result);
result = calculateScore(["6,3", "7,2", "8,1", "9,0", "X", "5,4", "6,3", "7,2", "8,1", "9,0"]);
console.log(100, result);