.NET/Java PDF, Tiff, Barcode SDK Library

) (Still assuming the revised definition of type ELLIPSE:) Of course, we could go on to define a type hierarchy in which ELLIPSE and CIRCLE are distinct immediate subtypes of the same supertype (which might perhaps be called ELLIPSE_OR_CIRCLE) At least such a type hierarchy would mean that we regain some kind of value substitutability, because we would now be able to substitute a value of type CIRCLE (or a value of type ELLIPSE, come to that) for a value of type ELLIPSE_OR_CIRCLE But then again, type ELLIPSE_OR_CIRCLE wouldn t have any values whose most specific type was ELLIPSE_OR_CIRCLE by definition, every such value would simply be either a value of type ELLIPSE or a value of type CIRCLE (and type ELLIPSE_OR_CIRCLE would be what Hugh Darwen and I call a union type).

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The XMLRPCObject is the key component of the as3-rpclib library that provides the XML-RPC client functionality. The XMLRPCObject indirectly inherits from mx.rpc.AbstractService, which is the base class for both WebService and RemoteObject.

Thus, it might be argued that this revised type hierarchy gives us back at least some of the advantages that our original design (in which CIRCLE was a subtype of ELLIPSE) gave us but it does so at the cost of having an extra type and a more complicated type hierarchy There might be other costs, too KU then goes on to assert that Every other aspect of the model whether concerning variables or values, operations or properties is perfectly preserved I don t know, here, whether KU is talking about the ellipses-and-circles example in particular or our model of type inheritance in general If it s the former, well, I think I ve discussed the issue sufficiently If it s the latter, well, I certainly don t think KU s alternative design in any way invalidates our original design.

Figure 5-17. The Circle tool is one of several preformatted shape tools. If you switch now to the tool directly above Circle in the Toolbox, which has an icon of a black arrowhead on a blue circle, the circle you just drew is surrounded by a square box and has a green dot in the center and a blue dot on the edge. This is the not-very-helpfully named Normal tool. Clicking and dragging the green dot moves the circle, and the same operation on the blue dot changes the size of the circle.

That s all we ll say here about XML-RPC. To use XML-RPC in real-life situations, you should study as3rpclib thoroughly and understand how different method invocation types and different data types work with XML-RPC.

Furthermore, KU doesn t address a crucial aspect of our approach, an aspect in which we clearly differentiate ourselves from just about every other approach I ve ever seen described in the literature I m referring to the aspect we call specialization by constraint (S by C) and generalization by constraint (G by C), according to which to talk extremely loosely! (a) squeezing an ellipse to make a equal to b converts that ellipse into a circle and (b) stretching a circle to make a greater than b converts that circle into a (noncircular) ellipse I find it extremely interesting that nobody has refuted, or even disputed, our claims that (a) S by C and G by C correspond to what actually happens in the real world and (b) we believe we know how to implement them (efficiently, too)..

JavaScript Object Notation (JSON) is a lightweight data interchange format. It s based on a subset of the ECMA standard that JavaScript implements but is language-independent and uses a simple text-based format that is easy to parse and generate. The official web site for JSON is http://www.json.org. AS3 Core Library (http://code.google.com/p/as3corelib/), an open source and well-supported library for AS3, has utility classes to serialize and parse JSON messages. If your remote Java source publishes data in JSON format and is accessible over a URL, you could get the data and consume it with the help of this library. A simple application might look like the following:

The last message I want to discuss here came from DN, who wrote a pleasant (and unusually coherent!) commentary on the overall debate; indeed, I found myself in considerable sympathy with much of DN s main argument. To paraphrase somewhat, that argument was that C++ and other OO languages aren t really trying to deal with subtyping in their approach to inheritance;

In order to create movement, you have to first put Synfig into Animate Editing mode by clicking the green check-mark icon in the lower-right corner of the canvas window. The green check then turns into a red light icon (see Figure 5-18); when you mouse over this red light, an In Animate Editing Mode tooltip appears. Also, the canvas is outlined with a thin red line.