August 2018
Intermediate to advanced
248 pages
5h 51m
English
Content preview from Mastering Python Design Patterns - Second Edition
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Use cases
The Template design pattern focuses on eliminating code repetition. If we notice that there is repeatable code in algorithms that have structural similarities, we can keep the invariant (common) parts of the algorithms in a template method/function and move the variant (different) parts in action/hook methods/functions.
Pagination is a good use case to use Template. A pagination algorithm can be split into an abstract (invariant) part and a concrete (variant) part. The invariant part takes care of things such as the maximum number of lines/page. The variant part contains functionality to show the header and footer of a specific page that is paginated [j.mp/templatemart, page 10].
All application frameworks make use of some form ...
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