Simple .NET/ASP.NET PDF document editor web control SDK

The issue with invariants is the major problem with such generalisations The comments on the main key aspects of circles for most programs were ridiculous and appeared nothing more than I m bored who can I troll today .. The point is that if a program is relying on these invariants with a circle but uses the ellipse class interface its behaviour may vary As such it would end up checking for the type of the object before expecting behaviour, which is against the point of polymorphism in the first place (look up LSP) .. So you may use inheritance just to provide implementation inheritance Depending on your applications needs, however, the invariants for a circle may be violated if you operate through an ellipse LSP, or substitutability, is precisely what concerns me in this debate.

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SOAP defines the protocol and messaging layer that enables XML messaging between service producers and service consumers The most common style of interaction involves RPC between one node (the client) and another node (the server) In order to make this happen, SOAP uses a specification called Web Services Description Language (WSDL) to define network services as a set of endpoints The endpoints are essentially operations that act on messages, which contain document- or procedure-oriented information WSDL describes the service endpoints in an XML format In order to consume a SOAP-based web service in Flex, you first create a WebService object WebService is the implementation class that abstracts all web service related features in an objectoriented manner After that, you access the associated WSDL file Once WSDL information is read, it is used to initialize the WebService object appropriately, by setting its property values.

9 A circle is a special kind of ellipse; therefore, a program that works for ellipses in general ought to work for circles in particular The inheritance model defined in The Third Manifesto satisfies this objective The model I was criticizing in my original article doesn t Incidentally, this particular quote illustrates my complaints about the quality of my opponents criticisms in general What on earth can it mean to operate [on a circle] through an ellipse Also, I ve never previously encountered the word troll used in the sense apparently intended here My loss, perhaps but does it mean anything different from attack Finally, note the suggestion that you may use inheritance just to provide implementation inheritance To me, this looks like more evidence in support of my strong suspicion that the object world fails to make a proper distinction between model and implementation.

Now you are ready to call a web service method or operation A web service component defines a few events that map to the life cycle of a web service interaction and allows for listeners to be added for these events Two logical outcomes are possible in a method call: success or failure WebService dispatches events of these two types they are called result and fault So, you define event handlers for each of these methods and register them Finally, you make the web service method call and consume the results In Flash Builder 4, there s a nifty little feature to automate the process of web service proxy generation and component binding to web service data sources It s part of the data management extensions that the IDE provides You could point to a WSDL file, and it generates the proxy automatically by introspecting the WSDL.

Figure 5-9. Ktoon s Export dialog (in Ubuntu) offers a choice of a sequence of PNG or JPEG stills, or a SMIL file and data directory.

[The second error:] This notion of variable s and values is outside of oop concerns Bare in mind that if your oop uses class semantics it is the class itself that governs behaviour not the data that may or may not be underneath it (ie, it may be in other classes and this class assembles behavioural abstractions against them) I love that bare in mind (a Freudian slip, I presume, and a rather telling one) More to the point: It is my claim (and I make this claim very strongly) that you must have values and at least if you re using an imperative language, not a functional one you must have variables too This claim is valid even in the OO world.

You can always manually code the web service proxies and look up the allowed operations by browsing the WSDL port type section, but let s favor productivity here If you don t use Flash Builder to build Flex applications, you ll have to go back to hand-coding..

So to say that the notion of variables and values is outside of OO concerns is I m sorry to have to say to betray a deep lack of understanding of what s really going on (in other words, a deep lack of understanding of fundamentals) Incidentally, I have to say too that if there s any logical connection at all between the two sentences quoted in the foregoing extract, then it certainly escapes me So also, even more so, does the meaning of the second sentence My point is that after taking things out of context the paragraph is then twisted beyond what really means.