public static Func <double, double, Func <string, string> > MakerZipper(ProjectorFactory facX, ProjectorFactory facY) =>
(x, y) => {
if (!double.IsNaN(x))
{
return(facX.Make(x));
}
if (!double.IsNaN(y))
{
return(facY.Make(y));
}
return(facX.MakeDefault());
};
public static Func <double, Func <string, string> > MakerMapper(ProjectorFactory facX) => x => double.IsNaN(x) ? facX.MakeDefault() : facX.Make(x);