private IEnumerable<int> Sum(Frame[] frames) {
var i = 0;
while (i < frames.Length && i < 10) {
if(frames[i].IsSpare()) {
yield return frames[i + 1].Roll1;
}
i++;
}
}
private IEnumerable<int> Sum(Frame[] frames) {
var i = 0;
while (i < frames.Length && i < 10) {
if (Frame.IsStrike(frames[i].Roll1)) {
if (Frame.IsStrike(frames[i + 1].Roll1)) {
yield return frames[i + 1].Roll1 + frames[i + 2].Roll1;
}
else {
yield return frames[i + 1].Roll1 + frames[i + 1].Roll2;
}
}
i++;
}
}