internal FrogsAndToadsPosition SubPosition(int leftIndex, int rightIndex)
{
if (_locationIsInvalid(leftIndex))
{
throw new IndexOutOfRangeException("leftIndex");
}
if (_locationIsInvalid(rightIndex))
{
throw new IndexOutOfRangeException("rightIndex");
}
if (leftIndex > rightIndex)
{
throw new InvalidOperationException("leftIndex bigger than rightIndex");
}
int length = rightIndex - leftIndex + 1;
FrogsAndToadsPiece[] result = new FrogsAndToadsPiece[length];
Array.Copy(_track, leftIndex, result, 0, length);
return(new FrogsAndToadsPosition(result));
}
private bool _isMovablePiece(FrogsAndToadsPiece gamePiece) => gamePiece.Move != 0;
private bool _targetIsJumpable(int target, FrogsAndToadsPiece piece) => _track[target] == piece.Converse;