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[1] [2] The interface of an object conforming to this pattern would include functions such as Insert, Update, and Delete, plus properties that correspond more or less directly to the columns in the underlying database table. The active record pattern is an approach to accessing data in a database. A database table or view is wrapped into a class.
The main Django distribution also bundles a number of applications in its "contrib" package, including: an extensible authentication system; the dynamic administrative interface; tools for generating RSS and Atom syndication feeds; a "Sites" framework that allows one Django installation to run multiple websites, each with their own content and ...
CRUD is also relevant at the user interface level of most applications. For example, in address book software, the basic storage unit is an individual contact entry. As a bare minimum, the software must allow the user to: [6] Create, or add new entries; Read, retrieve, search, or view existing entries; Update, or edit existing entries
Jinja is a web template engine for the Python programming language.It was created by Armin Ronacher and is licensed under a BSD License.Jinja is similar to the Django template engine, but provides Python-like expressions while ensuring that the templates are evaluated in a sandbox.
In-memory data structures: One can use hash tables and two-dimensional arrays in memory in conjunction with attribute-grouping metadata to pivot data, one group at a time. This data is written to disk as a flat delimited file, with the internal names for each attribute in the first row: this format can be readily bulk-imported into a relational ...
One of the very useful aspects of Python is the concept of collection (or container) types. In general a collection is an object that contains other objects in a way that is easily referenced or indexed. Collections come in two basic forms: sequences and mappings. The ordered sequential types are lists (dynamic arrays), tuples, and strings.
In the Decorator class, add a Component pointer as a field; In the Decorator class, pass a Component to the Decorator constructor to initialize the Component pointer; In the Decorator class, forward all Component methods to the Component pointer; and; In the ConcreteDecorator class, override any Component method(s) whose behavior needs to be ...
A hierarchical name could make use of either the names or the sequential index of the traversed elements. For example, a form input element could be accessed as either document.myForm.myInput or document.forms[0].elements[0]. The Legacy DOM enabled client-side form validation and simple interface interactivity like creating tooltips.