Revision Notes/Design Patterns
Field Entry - Design Patterns
Template Method Pattern
Defines the skeleton of an algorithm in a base class but lets subclasses override specific steps without changing the overall structure.
Field Note - Real-world Analogy
“Like a recipe. The recipe gives you the steps in order: preheat oven → prepare batter → pour in pan → bake → frost. The overall template is fixed. But the specific cake you make is determined by which batter and frosting recipe you use — the subclass fills in those details.”
Field Observations - Key Topics Covered
Some algorithms have a fixed overall structure but vary in some steps. For example, making tea and making coffee both involve: boil water, brew the drink, pour in cup, add condiments. The steps are the same but how you brew and what condiments you add are different.
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