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In this chapter, we took a tour of the generic collection classes, looking at lists, dictionaries, sets, queues, and stacks. These are classes that you will use day-in, day-out in your projects. You ll probably use List<T> most often to begin with, because it can be used as a direct replacement for an array, which most programmers are already comfortable with. But the other collection classes are worth your attention also, so I suggest you take the time to understand them all. We also looked at how to apply some collection-like features to arrays using the System.Array class. This is a very useful feature that doesn t get as much attention as it deserves. Collections are a complement to arrays, not a replacement, and being able to treat an array as you would a collection can be a great time-saver. Finally, we looked at how to create read-only collections and touched upon the legacy collections that have been part of the .NET class library since before C# supported generics. I strongly recommend that you stick to the generic classes, which have more features and where strong typing will help eliminate runtime exceptions.

public class Dep { /** * @deprecated Don't use this method any more. */ @Deprecated public static void myDeprecatedMethod() { System.out.println("Why did you do that "); } } class DeprecatedUsage { public void useDeprecatedMethod() { Dep.myDeprecatedMethod(); } }

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Line numbers are included for reference only. This code looks like it does an awful lot, but really it s pretty straightforward. Starting from the top of Listing 9-2: Lines 4 through 13 set up some variables, which we ll use later. Lines 14 through 34 get a reference to the document the user is working with, whether it exists in the root of the document library or in a folder/subfolder, and stores it in the item variable. Line 36 begins a loop through all of the workflows running on item. Line 39 ensures that we don t do any processing against workflows that are closed already. Line 41 applies a filter against the workflow tasks to limit it to only those that are currently in a running state. Line 42 begins a loop through the filtered workflow tasks. Lines 45 and 46 check the name of the user the task is assigned to so that we can limit further processing to only tasks assigned to the current user (passed in as a parameter) in line 47. Lines 57 through 68 build our XML document to return the workflow task information. That is really the heart of our solution. The rest of the work we need to do is preparing to call that web service and then reacting to its return value. That s all of the code we need for the web service so you can go ahead and compile and deploy. If you need a refresher on the steps, see the sidebar It Shouldn t Be This Hard.

The style sheet for the site The skins for GridView, DetailsView, and Login controls The background graphic for the header region The graphic for the rounded corner in the upper-left

Figure 9-5. Switch statements with different types of switch labels Although C# does not allow falling through from one switch section to another. You can attach multiple switch labels to any switch section. Following the statement list associated with a case, there must be a break or goto statement before the next switch label, unless there are no intervening executable statements between the switch labels. For example, in the following code there are no executable statements between the first three switch labels, so it is perfectly fine to have one follow the other. In cases 5 and 6, however, there is an executable statement between them, so there must be a break or goto statement. switch( x ) { case 1: case 2: case 3: ... break; case 5: y = x + 1; case 6: ...

Note A dot product between two vectors A and B is nothing more than (length of A)*(length of B)*(cosine

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