public B Reduce(B[] values)
{
A[] wrappedValues = values.Select(wrap).ToArray();
A a = other.Reduce(wrappedValues.ToArray());
return(unwrap(a));
}
public Grade FinalGrade(IValueReducer <Grade> method)
{
var hwGrade = method.Reduce(homeworks);
return(0.3 * hwGrade + 0.7 * exam);
}