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function ZParenizor2(value) { var that = new Parenizor(value); that.toString = function () { if (this.getValue()) { return this.uber('toString'); } return "-0-" }; return that; }

Again, we augment Function. We make an instance of the parent class and use it as the new prototype. We also correct the constructor field, and we add the uber method to the prototype as well.

This adds a public method to the Function.prototype, so all functions get it by Class Augmentation. It takes a name and a function, and adds them to a function's prototype object.

Everyone will benefit, even the Java community: Now that there's competition again, new constructs are—surprise!—again being considered for Java

Do languages have to sacrifice anything?

.NET goes much further: A routine written in a language L1 may call another routine written in a different language L2. A module in L1 may declare a variable whose type is a class declared in L2, and then call the corresponding L2 routines on that variable. If both languages are object oriented, a class in L1 can inherit from a class in L2. Exceptions triggered by a routine written in L1 and not handled on the L1 side will be passed to the caller, which—if written in L2—will process it using L2's own exception-handling mechanism. During a debugging session, you may move freely and seamlessly across modules written in L1 and L2. I don't know about you, but I've never seen anything coming even close to this level of interoperability.

Then just use the ExWebClient class to make your requests;

Public Class CookieWebClient : Inherits WebClient ' overridden to add cookie headers to http requests. Protected Overrides Function GetWebRequest(ByVal address As System.Uri) As System.Net.WebRequest Dim request As WebRequest = MyBase.GetWebRequest(address) If TypeOf request Is HttpWebRequest Then DirectCast(request, HttpWebRequest).CookieContainer = _cookies End If Return request End Function ' overridden to save cookies to the container for http requests. Protected Overrides Function GetWebResponse(ByVal request As System.Net.WebRequest) As System.Net.WebResponse Dim response As WebResponse = MyBase.GetWebResponse(request) If TypeOf response Is HttpWebResponse Then _cookies.Add(response.ResponseUri, DirectCast(response, HttpWebResponse).Cookies) End If Return response End Function ' overridden to save cookies to the container for async http requests. Protected Overrides Function GetWebResponse(ByVal request As System.Net.WebRequest, ByVal result As System.IAsyncResult) As System.Net.WebResponse Dim response As WebResponse = MyBase.GetWebResponse(request, result) If TypeOf response Is HttpWebResponse Then _cookies.Add(response.ResponseUri, DirectCast(response, HttpWebResponse).Cookies) End If Return response End Function Private Shared _cookies As CookieContainer = New CookieContainer End Class