Quick study sessions to strengthen memory and retain key concepts.
When does function extraction need a refactor?
When the rule is no longer easy to explain, test, or change without surprising nearby code. Refactoring is…
View Card →What production lens matters for function extraction?
Assume the simple demo is not enough. Real data volume, partner behavior, and partial failures will pressure the…
View Card →What review lens should you apply to function extraction code?
Ask whether the next engineer can see the rule, the data shape, and the likely failure mode quickly.…
View Card →What testing lens fits function extraction?
Test the boundary cases and invariants that would silently break if the rule were misunderstood. Good tests preserve…
View Card →What debugging lens helps most with function extraction?
Trace one real example, inspect the state changes, and compare them to the rule you intended to implement.…
View Card →Why does OrderOps care about function extraction?
Because the order-ops workflow must validate rows, compute totals across many items, and avoid one giant procedural script,…
View Card →What is the best default for function extraction?
Choose the simplest shape that keeps the rule explicit, testable, and easy for the next engineer to read.…
View Card →How should you explain function extraction in an interview?
Extract helpers when the name clarifies one step of the workflow and the caller becomes easier to read.…
View Card →What is the main pitfall around function extraction?
Copy-pasted logic or giant helper functions usually mean the code has not decided where one responsibility ends. Naming…
View Card →What is the core rule behind function extraction?
Extract helpers when the name clarifies one step of the workflow and the caller becomes easier to read.…
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