Functions and types can take type parameters with constraints, e.g. `func Map[T, U any](s []T, f func(T) U) []U`. Constraints are interfaces listing methods or type sets. Use generics for genuinely reusable containers and algorithms, not to replace clear concrete code.
← Go theorytheory 0/50 · 0%
level 1
Curious · 0 XP
streak
0d
perfect
0
badges
0
100 XP to Apprentice
Abstraction · medium
30. Generics in Go
Type parameters since Go 1.18.
1 min read2 questionsup to 50 XPtopic 30/50
Read in another language
AI translates the explanation and quiz text while preserving code and answer scoring.
How to study this topic
- 1. Read the explanation once end to end, skipping the code.
- 2. Re-read the code snippets and say out loud what each line does.
- 3. Answer the quiz without scrolling back — that is the real check.
- 4. Read every explanation, even for the answers you got right.
Scoring
- · Up to 30 XP from quiz accuracy.
- · +15 XP for a perfect first attempt.
- · +5 XP while a 3-day streak is running.
- · 75% or higher marks the topic complete.
Check your understanding
1. Constraints are expressed as…
2. The loosest constraint is…
Badges
First light
Pass your first topic
Sharp shooter
3 perfect first-try quizzes
On a roll
Study 3 days in a row
Week warrior
Study 7 days in a row
Grinder
Earn 500 XP
Deep diver
Earn 1500 XP