Module design_pattern_examples_rust::strategy

The Strategy design pattern example module

The Strategy pattern provides a way to easily assign different algorithms to an object instance that can be changed at the time the object is created.

In this exercise, the StrategyShowEntries instance sorts and displays a list of EntryInformation elements. Three different sorting strategies are provided (Name, Age, Height) and an option to reverse the normal order of the sort.

Accessed through the strategy_exercise() function.

Modules

• strategy_entryinformation
  Contains the EntryInformation struct that holds information about each entry that can be sorted.
• strategy_isortentries_trait
  Contains the SortOptions enum and the ISortEntries trait that represents different sorting strategies.
• strategy_showentries
  Contains the StrategyShowEntries struct that can make use of different sorting strategies to show an ordered list of entries.
• strategy_sortentries
  Contains the structs representing the various sorting strategies: StrategySortByName, StrategySortByAge, and StrategySortByHeight, along with a factory, SortStrategyFactory, that can instantiate a desired sorting strategy.

Functions

• create_entries 🔒
  Helper function to create a list of entries that can be sorted in various ways.
• strategy_exercise
  Example of using the “Strategy” design pattern.