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camera at the highest retail margin. Worst-case scenario, the information system has no notion of relevance, and the end user will have to order the data manually. Even when users know precisely what they re looking for, they might not precisely know where to look and how to access the information. Based on the what, they expect the information system to provide access to the exact data as efficiently and as fast as possible with as few irrelevant pieces as possible. (This irrelevant information is sometimes called noise.) You can refine what you re looking for in several ways. You can categorize information and display it as such, you can expose a detailed search screen to your user, or you can expose a single-search text box and hide the complexity from the user.





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Office Shapes offer a set of ready-made shapes you can add to your Office PowerPoint 2007 presentations to help add special emphasis to items. Office PowerPoint 2007 increases the number of Office Shapes and makes them available in a place that s easier to find while you work: in the Illustrations command set of the Insert tab (see Figure 6-7). After you draw a shape, the Drawing Tools contextual tab appears above the user interface. The Format tab is selected, showing a number of tools that enable you to work with the selected shape (see Figure 6-8). The Shape Quick Styles enable you to choose the lighting, color, style, and shadow of the object; and the WordArt Quick Styles (covered in the previous section) provide choices for the look of the text you add to the shape. The Arrange and Size command sets give you options for the size and position of the object.





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Now that you have seen logging using conventional and AspectJ-based techniques, let s look at the shortcomings of conventional solutions. Figure 5.1 illustrates the overall schematic of current logging solutions. Every place that needs to log an event needs to explicitly invoke a call to the log() method of an appropriate logger.

an execution plan and returns it as text. To demonstrate this session option, turn it on by running the following code:

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----------------------------------------------------------------------------------| Id | Operation | Name | Rows | Bytes | Cost | Pstart| Pstop | ----------------------------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | 4 | 1599 | | | | 1 | SORT AGGREGATE | | 1 | 4 | | | | |* 2 | FILTER | | | | | | | | 3 | PARTITION RANGE ITERATOR| | | | | KEY | KEY | |* 4 | TABLE ACCESS FULL | T1 | 2500 | 10000 | 1599 | KEY | KEY | ----------------------------------------------------------------------------------2 - filter(TO_NUMBER(:Z)<=TO_NUMBER(:Z)) 4 - filter("T1"."PART_COL">=TO_NUMBER(:Z) AND "T1"."PART_COL"<=TO_NUMBER(:Z)) An estimate of 2,500 is not good, especially since we know the right answer is in the region of 40,000 so where has it come from Starting from a position of incomplete knowledge (note in particular the KEY - KEY option for the partition start and stop in the plan), the optimizer has used table-level statistics (i.e., 1,000,000 rows). In this case, though, there is no information about actual values, so the optimizer has fallen back on some hard-coded constants namely 0.25% for between :bind1 and :bind2 ; the 2,500 rows is 0.0025 * 1,000,000.

The variable $divider is computed as the sum of all the kernel elements, unless it was given as a command-line option, and the kernel is adapted by dividing its elements by this number. Of course, care is taken not to divide by zero. Apart from providing the conv2d() method, PDL can be tremendously useful in other areas of image manipulation. It can be difficult to understand, partly because of the data structures with which it deals, and partly because the documentation is still rudimentary. If you plan on doing a lot of image manipulation that falls outside of the application domain of GD or Image::Magick, you would be well advised to give the Perl Data Language a chance.

Figure 3.3 Android Activity lifecycle diagram, showing the methods involved in the foreground and visible phases

G-34

is displayed as a tooltip Each of the elements you see in the figure 28 web part is a direct result of the values we assigned to the interface properties in listing 27 We ve just seen the IWebPart interface in action The IWebPart interface is the first of the three interfaces that are implemented by web parts Throughout this section we ve learned about the members of this interface and how they affect the look and feel of a web part at runtime Now we ll look at the next interface that is implemented by all web parts the IWebActionable interface and see how it is used to add verbs to custom web part controls 242 IWebActionable Earlier in this chapter we saw that each web part has a menu, containing menu items.

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