barcode reader library Primitive, Reference, and Value Types in C#

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// Reset everything for this demo stream.Position = 0; objectGraph = null; // Deserialize the objects and prove it worked objectGraph = (List<String>) DeserializeFromMemory(stream); foreach (var s in objectGraph) Console.WriteLine(s); } private static MemoryStream SerializeToMemory(Object objectGraph) { // Construct a stream that is to hold the serialized objects MemoryStream stream = new MemoryStream(); // Construct a serialization formatter that does all the hard work BinaryFormatter formatter = new BinaryFormatter(); // Tell the formatter to serialize the objects into the stream formatter.Serialize(stream, objectGraph); // Return the stream of serialized objects back to the caller return stream; } private static Object DeserializeFromMemory(Stream stream) { // Construct a serialization formatter that does all the hard work BinaryFormatter formatter = new BinaryFormatter(); // Tell the formatter to deserialize the objects from the stream return formatter.Deserialize(stream); } }
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target "CopyFilesToDest" partially, because some output files are out of date with respect to their input files. Since the DeleteSomeRandomFiles target
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Part V
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The first functional testing technique testers should learn to master is equivalence class partitioning (ECP). Understanding how to use this technique is important because it provides a foundation for many other techniques and approaches to software testing. The ECP technique is simply a tool that enables the tester to evaluate input or output variables systematically for each parameter in a feature. But to be most effective equivalence class partitioning requires us to perform a comprehensive analysis of the variable data for each parameter in the context of the specific system. So, before designing the ECP tests, we must meticulously decompose and model the variable data for each input and/or output parameter in discrete subsets of valid and invalid classes. The ECP tests are then derived from creating unions of valid class subsets until all valid class subsets have been used in a test, and then evaluating each invalid data subset individually. This seems like a simple enough explanation; however, this technique requires both in-depth and broad knowledge to decompose input and/or output variable data precisely into discrete valid and invalid class subsets. The subsets are defined in such a way that any element of a given subset would logically produce the same result as any other element in that subset. We can then design both positive and negatives tests to systematically evaluate the functional capabilities of input and/or output parameters and the system's ability to handle any errors adequately. The value of the ECP technique is twofold. First, it helps us systematically reduce the number of tests from all possible tests and still provides us with a high degree of confidence that other variables or variable combinations in the same subset will produce the same expected result repeatedly. For example, assume you are testing a text box control that accepts a string variable of Unicode characters between upper case A and Z with a minimum string length of 1 and a maximum string length of 25 characters. Exhaustive testing would include each letter one time (261) and each letter combination for every possible string length. So, to test for all possible inputs the number of tests is equal to 2625 + 2624 + 2623 + 261. That is a really big number (RBN)! But let's make an assertion that testing the string "BCD" is similar to testing the string "WXY." So, logical deduction of the valid class subsets for this specific parameter would include the following: The uppercase Unicode characters between uppercase A and Z A string of characters with a string length between 1 and 25 characters Based on this model of valid data for the sample input parameter, a string of "ABCDEF" should produce the same result as a string of "ZYXWVUTSRQPONM," and the same result for a string composed of "KUGVDSFHKIFSDFJKOLNBF." The second advantage of the ECP technique is that we can effectively increase the breadth of data coverage by randomly selecting elements from a given subset to use as test data because any element from a specific valid or invalid class subset should produce the same result (if the data is correctly decomposed into discrete subsets and there is no errant behavior) as any other element in that subset. Using the previous example, tests for the given name parameter will surely include nominal real-world test data such as "Bob," "Nandu," "Elizabeth," or "Ling." But static test data provides very little value in terms of new information or evaluating the robustness of the algorithm after the first iteration (unless datamatrix generator
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Scenario 5: INSERT SELECT, Empty Heap, Without TABLOCK This scenario is similar to Scenario 3, except that in this case you do not specify the TABLOCK table hint. The following code provides the Preparation and Operation parts of this test:
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EXEC dbo.GetOrders @odate = '20080506';
Objects created by code in one AppDomain cannot be accessed directly by code in another AppDomain When code in an AppDomain creates an object, that object is owned by that AppDomain . In other words, the object is not allowed to live beyond the lifetime of the AppDomain whose code constructed it . Code in other AppDomains can access another AppDomain s object only by using marshal-by-reference or marshal-by-value semantics . This enforces a clean separation and boundary because code in one AppDomain can t have a direct reference to an object created by code in a different AppDomain . This isolation allows AppDomains to be easily unloaded from a process without affecting code running in other AppDomains .
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Figure 7.1 The dialog box that appears when you first start Microsoft Producer. In this chapter, you will first create a new project using the New Presentation Wizard. Then later in the chapter, you will see how to build a project from scratch by starting with a new blank project. Using the New Presentation Wizard The New Presentation Wizard helps you start a new presentation by walking you through the following steps. By going through the New Presentation Wizard, you can quickly create a new project, which you can later publish as a presentation.
// correctly implemented "&" operator supports this // implicitly provided by overloading "+" operator
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Again, you ll notice that the SafeHandleZeroOrMinusOneIsInvalid class is abstract, and therefore, another class must be derived from this one to override the protected constructor and the abstract method ReleaseHandle . The .NET Framework provides just a few public classes derived from SafeHandleZeroOrMinusOneIsInvalid, including SafeFileHandle, SafeRegistryHandle, SafeWaitHandle, and SafeBuffer . Here is what the SafeFileHandle class looks like:
Exam objectives in this chapter:
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