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Young Gao
Young Gao

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Pragmatic Error Handling in Go

#go #backend #programming

Pragmatic Error Handling in Go

Beyond if err != nil - techniques that work.

Always Wrap 

return fmt.Errorf("get order %s: %w", id, err)
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Sentinels 

var ErrNotFound = errors.New("not found")
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HTTP Pattern 

type HandlerFunc func(w http.ResponseWriter, r *http.Request) error
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errgroup 

g, ctx := errgroup.WithContext(ctx)
g.Go(func() error { return fn() })
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