Two functions look similar but encode rules owned by different domains that are expected to change independently. What should guide a decision to merge them?
Answer & explanation
Shared meaning and a shared change lifecycle.
Similar text can arise from different requirements. A shared abstraction is useful when the meaning and lifecycle are shared. Understanding that distinction prevents DRY from becoming a rule to merge everything.
The Pragmatic Programmer
Chapter 2 · A Pragmatic Approach
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