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The for loop in this section loops round each RECORD entry in the XML, retrieves the value stored in the value attribute, and pops the value into the JavaScript array. After deallocating the get variable by setting it to null, we move onto the main core of the AutoComplete control s functionality: var myDataSource = new YAHOO.widget.DS_JSArray(myArr); var myAutoComp = new YAHOO.widget.AutoComplete( 'P1_REPORT_SEARCH', 'autocompletecontainer', myDataSource); myAutoComp.typeAhead=true; Here we set up a new data source to be used for the AutoComplete control. For simplicity, we use a JavaScript array so we can pass in the myArr, which was populated earlier with the entries from the XML returned by the On Demand process. (Refer to the YUI Library documentation for a list of data source types you can use.) Next, we create the control by passing in the DOM item that it needs to receive the input from (P1_REPORT_SEARCH in our case) and also the name of a DIV section where the control can be placed (so we pass in autocompletecontainer, which corresponds to the DIV section we created earlier). We also pass in the data source that the control should use to obtain the list of values for the control. Finally, we set the typeAhead property of the control to true, so that it will update the P1_REPORT_SEARCH control with the matches as it finds them. Finally, we modify the same Toggle Column Visibility button we had earlier to call the get_GetUserSearches function when it is clicked. So if you put all this together, run the application, and begin typing in the search text field, you will get the same behavior as before. However, if you click the button that calls the JavaScript routine you created, you will see the AutoComplete control in action, as shown in Figure 8-14.

Technically there is no difference between the renaming and the moving of a file. This is because in both cases, the location of the blocks in which the content of the file is stored doesn t change as long as the file stays on the same partition. The only thing that does change is the name of the file. Thus, looking for a specialized rename utility will prove fruitless. For both purposes, use mv. It s easy. The first argument you give this command is the name of the original file; the second argument is the name of its new location. As with all other commands that work with files, you can use a wildcard as well. If, for instance, you want to move everything from ~/rubbish to /dev/null (the null device on your system), use mv ~/rubbish/* /dev/null.

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Figure 8-14. AutoComplete in action If you look closely at the example in Figure 8-14, you can see that the user typed only the letters po, and the AutoComplete control suggested the word position. Notice that the letters after po are selected. If the user hit the Enter key at this point, the search phrase position would be submitted into the search text field automatically.

The Browse Catalog user story will require the developers to create a main page for the application. The developers discuss what it will take to display a list of product categories and decide that they will need to build a query to the database that will return a dataset. Then the application will need to display the results of the dataset on the main page. Figure 12-2 shows the Browse Catalog story tasks.

Sometimes it makes sense to do some house-cleaning on your server. For example, now and then you may want to move all the files in /tmp by hand. To do so, use rm. This command normally only removes files from the current directory, not from any underlying subdirectories. If you want it to remove a complete directory structure, use the option r (discussed earlier in the Copying Files section). If you want rm to just do its work and not complain about anything, use f as well. This forces the removal of all files without asking for confirmation. If instead you want to remove the entire content of the /tmp directory as well as the directory itself, use rm rf /tmp/*. This removes the directory, but this isn t necessarily a good idea given it s a system-created directory. If you only want to remove the content of the directory, but not the directory itself, first activate the directory and then use rm rf *.

Please excuse the corny title of this section, but it does describe what it covers: deciding whether to evaluate authorization schemes on every page view or just once per session In this chapter s example, the IS_ADMIN_USER authorization scheme is evaluated only once per session This means that the value is cached the first time it needs to be evaluated after a new session is established (which would usually occur after the user successfully authenticates to the application) So if a nonadministrator, such as the john user, authenticates to the application, he will not see the Create button But what if you modify that user so that he is now an administrator, as shown in Listing 4-7 Listing 4-7 Modifying the john User to Be an Administrator apexdemo@10gR2> update user_repository 2 set admin = 'Y' 3 where username = 'john'; 1 row updated apexdemo@10gR2> commit; Commit complete.

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