Go Generics and Type Parameters

When to Use Generics

Start with concrete types. Generalize only when a second type appears.

Prefer Generics When

• Multiple types share identical logic (sorting, filtering, map/reduce)
• You would otherwise rely on any and excessive type switching
• You are building a reusable data structure (concurrent-safe set, ordered map)

Avoid Generics When

• Only one type is being instantiated in practice
• Interfaces already model the shared behavior cleanly
• The generic code is harder to read than the type-specific alternative