phase 0 · 0.4-errors-as-values
Errors as values, not exceptions
prereqs
0.3-types-zero-values
The lesson for this task hasn't been written yet. The mastery criteria below is the shortest description of what you'll own when this task is green.
Mastery criteria
- Write a function that returns (T, error); handle every call with if err != nil
- Use fmt.Errorf with %w to wrap an underlying error
- Use errors.Is / errors.As to match a sentinel error in a test
- Articulate why there's no try/catch in Go and what changes about how you think about failureVerify
Run from your go-dojo repo root:
go-dojo verify 0.4-errors-as-valuesThis runs the task's go test suite in exercises/phase-0/0.4-errors-as-values/, commits the attempt to .go-dojo/attempts/, and updates your mastery.