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Multiple Hierarchies. Code 39 Extended Generator In Visual . Using Barcode drawer for VS .NET Control to generate create USS Code 39 image in Visual Studio .NET applications.It is a common misconception that all groups within the organization must agree on the structure and content of one hierarchy Not only is this not true, but multiple hierarchies are encouraged because this enables multiple viewpoints to be represented in the model In the Date dimension presented earlier refer to Figure 7-3), note that there are two hierarchies: one to support the calendar year rollup and one to support the scal year rollup Another example of the bene ts of multiple perspectives can be seen for customers In this example, the ship to location is what is called Customer Figure 7-15 shows multiple customer hierarchies: the customer s location, the customer s bill to location and the company s sales organization hierarchies Each hierarchy is diagrammed separately in the business dimensional model so that each is clearly visible It is important to ensure that each is labeled uniquely.Related: 

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TIPA dimension can include attributes that are descriptive and that relate to. . creating hierarchies. Code 3/9 Encoder In Java Using Barcode generator for Java .Related: 

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one dimension completes before the next dimension begins Alternatively . them as part of the API Sec 642 . Encode Code39 In .NET Using Barcode generator for Visual .Related: 

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You might think talking about QA this early in the book is putting the cart before the horse Well, you're wrong Quality assurance must e a thread that runs through your application from requirements capture, definition, and design, to implementation, and on to deployment The standard, at least for Web application development, tends to be "design, develop, test, deploy" You'll notice something peculiar about this methodology: If problems are found in testing (and they always are), no step to fix them is included before the deployment phase No wonder so much bad code is out there in the world! As humans venture into the universe, we're taking this poorly QAed code with us! A prime example of missing QA was the much-publicized loss of the NASA Mars Climate Orbiter spacecraft in 1999 It spun out of control because part of the software assumed English units and another part assumed metric units It's inconceivable that these code modules were never tested together, but there you go a half a billion bucks down the drain So what can you do to make sure you never lose a half a billion smackers It's actually not that difficult to avoid The tricky part is thinking about QA and testing at the beginning of the project and developing a comprehensive test plan along with your requirements documents and technical specifications The second tricky part is making sure that you've budgeted enough time and money for testing.

Set B In Visual C#.NET Using Barcode generator for VS . USS Code 128 Encoder In .NET Using Barcode printer for ASP .One general design goal of SWT is the orthogonality of the API Once you nderstand a concept from SWT, you can apply it everywhere In this chapter we will do a pattern-based analysis of how to.Related: 

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Unit testing is great for certifying that software components are working correctly, but eventually you'll need to test that whole subsystems work well when integrated and that the entire system works well as a whole The way to approach this is to put together a comprehensive testing plan A great place to start is you guessed it your requirements document Starting with our initial requirements, you can put together a rough testing plan and sample data For example, if your original use case is "a user must be able to write an e-mail message," that might translate into several real use cases: 1 User is notified that new e-mail message is waiting for him 2 User brings up a list of new e-mail messages waiting 3 User selects an e-mail message to view and reads contents of message 4 User indicates that he is finished and returns to the list of new messages These real use cases might appear in your technical specification document (see the section The Technical Specification Document in this chapter) Each of these use cases can be translated into a test scenario For example, take the first real use case from the previous list; the test scenario might read like this (depending on your user interface choices): 1 Send a new message to user X 2 User X should see a notification dialog pop up on her screen with an "OK" button on it 3 User X should press the "OK" button, and the notification should disappear That's the level of granularity you're going for in a test scenario: extremely fine, action-by-action This approach minimizes confusion on the part of your testers and makes sure different testers consistently test the system The following are some of the items that might be included in a test plan, depending on the particular project:.

Let's look at each of the SafeArray and SafeArrayBound elements individually, as well as the different flags we can apply to the fFeatures field Although tedious, this exercise is important because we will read these values from VB-created arrays as well as set them in descriptors that we create ourselves cDims is the number of dimensions in the array This must be set to 1 for a one-dimensional array cbElements is the number of bytes per element The memory address for the Index element in an array is calculated as pvData + Index * cbElements cLocks is a lock count for the array When an array is locked, you cannot ReDim, ReDim Preserve, or Erase the array You can change the value of elements in the array, but you cannot modify or destroy the array's structure VB locks an array when you pass an element of the array to a ByRef parameter or when you use a structure-type array element in a With statement Trying to Erase or ReDim [Preserve] an array with cLocks > 0 generates an error 10 ("This array is fixed or temporarily locked") pvData is the element in an array that points to the memory for the array's data pvData is the main player in the SafeArray structure: All other fields play supporting roles pvData is stored as a Long value, which has the same length as the void* pointer in the OLE Automation SAFEARRAY definition cElements specifies the number of elements allowed per bound ILbound is the lower bound of the array dimension VB's LBound unction reads its value directly from this element, while UBound is calculated as ILbound + cElements- 1 fFeatures is a very important field The flags set in fFeatures enable the SafeArray* API set to correctly destroy an array and the standard COM marshaling engine to successfully move the array between threads and processes These flags fall into two categories: they specify either the type of elements in the array or the method used to allocate the memory for the descriptor and the array data itself.

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The first group of flags includes three memory flags FADF_AUTO (&H1), FADF_STATIC (&H2), FADF_EMBEDDED (&H4) and FADF_FIXEDSIZE (&H10) These flags describe how the array was allocated, and they block ReDim [Preserve] If any of the memory flags are set, the Erase statement cleans up elements in the array, but it does not free the memory If FADF_STATIC is set, the memory block for any type is zeroed by Erase In VB variable-size arrays, none of these flags is set A fixed-size array has FADF_STATIC and FADF_ FIXEDSIZE set, and a fixed-size array in a structure adds the FADF_EMBEDDED flag as well VB doesn't generate arrays with the the FADF_AUTO flag set, but I'll use it later in the chapter to indicate that the array descriptor is allocated on the stack VB plays some nasty little games with the fFeatures flags and local fixed-size array variables (I had a wonderful time stepping through native assembly code to fully verify this) Although VB allocates the descriptor for a local fixed-size array variable on the stack, the data for the array is allocated on the heap with SafeArrayAllocData This method of allocation allows you to create arbitrarily large fixed-size local arrays, by passing the 64K upper limit of fixed-size arrays in structures However, this means that the array is neither fixed-size nor static in the sense that these flags were intended VB just uses the flags during the scope of the function or lifetime of the class to prevent other routines from modifying the array So when a local array variable goes out of scope, VB checks for arrays that are FIXEDSIZE and STATIC (but not EMBEDDED or AUTO) VB clears these flags before calling SafeArrayDestroyData, which then clears and releases the memory block that had been locked by the fFeatures settings The next group of flags indicates the type of element in the array One or none of these flags can be set for an array FADF_BSTR (&H100) indicates that the array contains Strings, so calling Erase on the array frees each of the string elements with the SysFreeString API, then destroys or zeroes the memory Similarly, FADF_VARIANT (&H800) forces a call to the VariantClear API for each lement, and FADF_UNKNOWN (&H200) and FADF_DISPATCH (&H400) indicate that IUnknown-Release should be called on each nonzero element to release the reference on the object The array destruction routines are able to free memory associated with all simple types simply by looking at these flags.

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