Pattern Recognition

Computational Thinking · Cornerstone #2

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How to spot the similarities between a new problem and ones you have already solved — and reuse the solution instead of starting from scratch.

By the end, you can

Define pattern recognition and explain why it is useful in programming.
Place pattern recognition correctly among the four cornerstones of computational thinking.
Apply the three spotting questions to an unfamiliar problem before writing any code.
Identify which of the four operations (Search, Sort, Filter, Count) applies to a given task.
Recognize the loop meta-pattern as the outer structure that contains the four named operations.
Map a program's structure onto the Input → Process → Output meta-pattern and locate where named operations live.
Decompose a multi-step problem (such as a recommendation feed) into known patterns.
Distinguish pattern recognition from abstraction and explain how the two cornerstones relate.
Explain the limits of pattern recognition as a heuristic rather than a guarantee.

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