Intermediate Topic 24 of 50 Software Engineering
Strategy Pattern
Swapping interchangeable algorithms at runtime.
How it works
Encapsulate interchangeable algorithms behind one interface and select one at runtime, avoiding large conditionals.
Where it is used
Different payment, sorting or pricing methods.
Common pitfall
Needless for just one implementation.
Where it fits in the course
Strategy Pattern is topic 24 of 50 in Software Engineering, rated Intermediate. It follows Observer Pattern. The next topic is Decorator Pattern.
Practice and explore
- Open the interactive lesson, with a mini quiz.
- Take the Software Engineering quiz.
How to study this topic
- Read the explanation above and restate the definition in your own words.
- Open the interactive lesson and answer its mini quiz.
- Read the common pitfall, then write a short example that avoids it.
- Check your understanding in the Software Engineering quiz, and revisit the topic if you miss a question.
Frequently asked questions
What is Strategy Pattern?
Swapping interchangeable algorithms at runtime. It belongs to Software Engineering and is an intermediate-level topic.
Where do people use Strategy Pattern?
Different payment, sorting or pricing methods.
What is the most common mistake with Strategy Pattern?
Needless for just one implementation.
What should I learn before this topic?
Start with Observer Pattern, the topic just before it in Software Engineering.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Software Engineering quiz.
Is Strategy Pattern hard to learn?
It is an Intermediate topic. Be comfortable with the Beginner topics in this area first, then read the common pitfall carefully, since it is where most mistakes happen.
How long does it take to learn Strategy Pattern?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Strategy Pattern?
Observer Pattern, Decorator Pattern, Factory Pattern are closely connected. The full list is in the related topics section of this page.
What should I study after Strategy Pattern?
Continue with Decorator Pattern, the next topic in Software Engineering.
Related topics
- Observer Pattern (Software Engineering)
- Decorator Pattern (Software Engineering)
- Factory Pattern (Software Engineering)
- Dependency Injection (Software Engineering)
- Producer-Consumer Pattern (Concurrency & Parallelism)
- Saga Pattern (Distributed Systems & Cloud)
- Pattern Matching (Languages & Compilers)