Delphi Prism Language Details

Some developers like to pass in an array and then handle the array for a pseudo technique but that's not really overloading.

ASP Classic does not support any type of overloading.

• Operator - No.
• Method - No.

Some developers like to pass in an array and then handle the array for a pseudo technique. Although not overloading, it's useful.

 ASP Classic Overloading (Not Supported)

C# supports both method and operator overloading.

For methods, C# supports implicit overloading (no need for an overload keyword).

 C# Overloading (implicit)

C++ Overloading

• Operator - Yes for C++, no for C. Almost all operators can be overloaded for user-defined types
• Method -

 C++ Overloading

Paradox & Overloading

• Operator - No.
• Method - No.

However, you can have the same named method or procedure so long as they are in different libraries. This is important if you use libraries in a class-like OOP way and wish to implement some form of polymorphism (i.e. libMember.Open and libVendor.Open). This is an OOP-like technique for implementing a subtyping-like polymorphism which is also known as inclusion polymorphism.

Also, some developers like to pass an array and then handle the array for a pseudo technique. Although not overloading, it's useful.

 ObjectPAL Overloading  

Delphi supports both method and operator overloading.

For method overloading, you use the overload keyword (all versions of the routine must include the overload keyword). The compiler chooses the correct method first based on the number of parameters, then on the type so you can have two overloaded methods with the same number of parameters so long as at least one parameter is different.

Another form of method overloading is with the use of default parameters, a shortcut syntax, where you specify a default parameter value.

Delphi also supports operator overloading with some operators.

function Add(a, b: integer): Integer;  overload;
begin
  Result := a+b;
end;

function Add(const msg: String; a, b: integer): String; overload;
begin
  Result := msg + IntToStr(a+b);
end;

 Delphi Overloading (overload)

Java Overloading

• Operator - No. Sun deliberately chose not include operator overloading in the Java language.
• Method - Yes.

 Java Overloading

JavaScript Overloading

• Operator - No.
• Method -

 JavaScript Overloading

Perl

• Operator - Yes
• Method -

 Perl Overloading

PHP

• Operator - No.
• Method -

 PHP Overloading

Developer defined overloading in VB Classic:

• Operator - No
• Method - No

 VB Classic Overloading (Not Supported)

VB.Net supports both method and operator overloading.

For method overloading, you either use implicit overloading (no special syntax like C#) or use the Overloads keyword. If you use the Overloads keyword, all overloaded methods with the same name in the same class must include the Overloads keyword.

 VB.Net Overloading (Overloads, or implicit)