Overloading methods

Hi Ziv,

Is there an opiton of overloading methods?

Not really. That is, you can't define several functions with the same name but different parameter sets - neither in VBScript, nor in JScript, nor in DelphiScript.



However, since these languages have no strong typing, you can pass different data types - strings, numbers, and so on - in the same parameter. You can then use aqObject.GetVarType inside the function to check the parameter's data type and implement the needed conditional logic. Like this, for example:

function Main()

{

  Log.Message(Add10(5));

  Log.Message(Add10("7"));

}



function Add10(Value)

{

  switch (aqObject.GetVarType(Value))

  {

    case varInteger: return Value + 10;

    case varOleStr: return parseInt(Value) + 10;

    default: throw "Invalid parameter type";

  }

}

Search VBScript overloading and JScript overloading for more examples.

Another quastion, is there an opiton to set default values for paremeters in methods?

In DelphiScript - yes, see Default Values of Routine Parameters.



In VBScript, you can pass Null in place of non-used arguments or use an arguments array as explained here:

Optional Arguments in VBScript

Optional Arguments in VBScript, Part 2



In JScript, you can pass an arbitrary number of arguments to a function or pass them using an array, dictionary or custom object:

Function overloading in JavaScript - Best practices

How to implement polymorphism in JavaScript

Using optional parameters in JavaScript functions

Optional Function Arguments in JavaScript