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Core Withoutbyerr

docs/data/core-withoutbyerr.md

1.53.0745 B
Original Source

Filters a slice by excluding elements whose extracted keys match any in the exclude list. Returns an error if the iteratee function fails, stopping iteration immediately.

go
type User struct {
  ID int
  Name string
}

users := []User{
  {1, "Alice"},
  {2, "Bob"},
  {3, "Charlie"},
}

filtered, err := lo.WithoutByErr(users, func(u User) (int, error) {
  if u.ID == 2 {
    return 0, fmt.Errorf("Bob not allowed")
  }
  return u.ID, nil
}, 2, 3)
// []User(nil), error("Bob not allowed")
go
type User struct {
  ID int
  Name string
}

users := []User{
  {1, "Alice"},
  {2, "Bob"},
  {3, "Charlie"},
}

filtered, err := lo.WithoutByErr(users, func(u User) (int, error) {
  return u.ID, nil
}, 2, 3)
// []User{{1, "Alice"}}, nil