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The only thing left to implement from the feature list is a rating system that lets users mark particular snippets they found useful (or not useful, as the case may be) Once again, start with a data model As with the bookmarking system, it s fairly simple You need to collect four pieces of information: The snippet being rated The user doing the rating The value of the rating in this case, either a +1 or 1, for a simple up or down voting system The date of the rating You can easily build out this Rating model in cab/modelspy: class Rating(modelsModel): RATING_UP = 1 RATING_DOWN = -1 RATING_CHOICES = ((RATING_UP, 'useful'), (RATING_DOWN, 'not useful')) snippet = modelsForeignKey(Snippet) user = modelsForeignKey(User, related_name='cab_rating') rating = modelsIntegerField(choices=RATING_CHOICES) date = modelsDateTimeField() def __unicode__(self): return "%s rating %s (%s)" % (selfuser, selfsnippet, self.

You should now have a working understanding of object-oriented programming, how it is implemented in C, and efficient ways of storing data. If you re a bit unsure, don t worry; some of these concepts are very complex. You will see plenty of examples of object-oriented design in the next chapter, in which I will introduce GTK+, the graphical user interface library used by Gaim and many other applications.

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If multiple Forms Nodes are implemented, one of the Web Nodes is designated as the primary Web Node and serves as the entry point for access to the Forms Nodes The Forms Metrics Server runs on the primary Web Node and serves as the load balancer for sending requests to the multiple Forms Nodes Information regarding advanced configuration for the Oracle E-Business Suite can be found in MetaLink Note 2173681 When the Concurrent Processing Nodes are load balanced, this configuration is referred to as Parallel Concurrent Processing Parallel Concurrent Processing is load balanced by the Internal Concurrent Manager If Parallel Concurrent Processing is required, then a shared filesystem implemented with either Network Filesystem (NFS) or a shared disk array is required to share log and output files that are generated by the Concurrent Managers Additional information regarding Parallel Concurrent Processing may be found in MetaLink Note 1854891.

ve mentioned that GTK+ is the library Gaim uses to create its graphical user interface, or GUI. In this chapter, I ll introduce GTK+. You ll learn some of the principles behind it, such as widget packing and event listeners. Then I ll introduce some common widgets, the individual elements such as buttons and scrollbars that comprise a GUI. Throughout, I ll provide practical examples of the techniques I m discussing. For the complete API documentation, visit http://www.gtk.org/api.

get_rating_display()) def save(self): if not selfid: selfdate = datetimedatetimenow() super(Rating, self)save() As with the Bookmark model, you re setting related_name explicitly on the relationship to the User model in order to avoid any potential name clashes with other applications that might define rating systems Meanwhile, the rating value uses an integer field, with appropriately named constants, to handle the actual up and down rating values, in much the same fashion as the status field on the weblog s Entry model There is one new item, though: in the __unicode__() method, you re calling a method named get_rating_display() Any time a model has a field with choices like this, Django automatically adds a method whose name is derived from the name of the field that will return the human-readable value for the currently selected value While you re in the cab/models.

GTK+ is a powerful object-oriented widget toolkit written in C, but with bindings available in many languages. The toolkit has its origins in the X Window System used by most UNIX-like operating systems, but ports are available for Windows and the Linux framebuffer.

For the database, a multiple-node implementation may be achieved by implementing Oracle Real Application Clusters (RAC) In a RAC environment, multiple Database Nodes function as one database instance, accessing the same database files Additional information for implementing Oracle RAC with 11i may be found in MetaLink Note 3127311..

Note A language binding allows you to use a library that isn t native to the language you re programming

py file, you can also add a method to the Snippet model that calculates a snippet s total score by summing all of the ratings attached to it This method will use Django s aggregate support again, but with a different type of aggregate filter: django dbmodelsSum This filter, as its name implies, adds up a set of values in the database and returns the sum..

Each implementation of Oracle Applications contains an APPL_TOP and a COMMON_TOP directory on each node. The APPL_TOP directory comprises all product files and directories, all core technology files and directories, as well

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