Multiple type parameters and return values

onez

This class returns a max double value out of a double array. I would like to enter any type of numerical array and return the max. I remember a C++ code that involving putting a T in front of 'type' or something that was real easy. public static double ReturnMax(ArrayList Values) { int c = 0; double Max = 0; double Val; while (c < Values.Count) { Val = Convert.ToDouble(Values[c]); if (Val > Max) { Max = Val; } c++; } return Max; }

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

S_Kiryazov22y ago
There are several ways to achieve this functionallity. First of all, templates, as mykonian said, are not implemented for the .net languages but only for the 1.x versions of the framework. In 2.0, however, along come the generics that are something similar as I have heard but you've got to read about them. Generics are available for C# but for the other .net languages I'm not sure. Another way is to use explicit cast to Double. I think that every numerical type can be cast to Double without any loss of precision. Another approach is to use IComparable interface reference in the comparison operations - all numbers implement this interface and this is good example of interface polymorphism. However, it is also a good example how to use .net framework inefficently becuase if you use this technique to sort large arrays this will cause a significant performance drawback because of boxing and unboxing of the value types, so avoid it in real-life scenarios.
0
Mykonine22y ago
You mean class templates? Sorry, but in C# you can't use class templates to handle ambiguous variable types. You'll have to either cast or handle all types.
0