samber/mo

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🦄 Monads and popular FP abstractions, powered by Go 1.18+ Generics (Option, Result, Either...)

Stars: 3.4k
Forks: 120
Open beginner issues: 0
Indexed issues: 12
Avg merge: 4d 17h
Merged PRs (30d): 3

Dominant language: Go
License: MIT
Last GitHub push: Sep 7, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

12 open issues indexed

Result[T] return signature in functions `result.Match` and `resultMapErr` Open

breaking-change

Difficulty 4/5 3-5 days Newbie friendliness 48/100

samber/mo#102 · 1 comment · Opened Apr 16, 2026
Option JSON serialization/deserialization does not handle the null case correctly Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

samber/mo#72 · 9 comments · 4 reactions · Opened Jun 6, 2025
Transforming return type when using map Open

breaking-change

Difficulty 5/5 Over a week Newbie friendliness 45/100

samber/mo#66 · 7 comments · 3 reactions · Opened Mar 5, 2025
v1.13.0 changed supported generic types for Option and driver.Valuer interface Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

samber/mo#50 · 1 comment · Opened Jul 19, 2024
Feature Request: (or How-To) about call a method on Foldable when "T", "U" inherit from same interface Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

samber/mo#48 · 3 comments · Opened Jul 8, 2024
Add .Unpack() to Result and friends to mirror lo Tuple family OR add .Get() to lo Tuple family to mirror mo Result/Option Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

samber/mo#40 · 1 comment · Opened Apr 26, 2024
Type transformations in Map Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

samber/mo#37 · 4 comments · 5 reactions · Opened Dec 8, 2023
Weird function signature on `(mo.Option).Map` Open

breaking-change

Difficulty 5/5 Over a week Newbie friendliness 35/100

samber/mo#21 · 3 comments · 6 reactions · Opened Mar 20, 2023
Decoding BSON values Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

samber/mo#20 · 6 comments · Opened Mar 2, 2023
Translating types Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

samber/mo#11 · 11 comments · 6 reactions · Opened Sep 2, 2022
Add Helper function that would work like Either.Match but would return another type Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

samber/mo#6 · 4 comments · 4 reactions · Opened Aug 5, 2022
Applicative Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

samber/mo#3 · Opened Jun 21, 2022

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