lo/docs/data/core-withoutbyerr.md

name, slug, sourceRef, category, subCategory, signatures, variantHelpers, similarHelpers, position

name	slug	sourceRef	category	subCategory	signatures	variantHelpers	similarHelpers	position
WithoutByErr	withoutbyerr	intersect.go#L287	core	intersect	func WithoutByErr[T any, K comparable, Slice ~[]T](collection Slice, iteratee func(item T) (K, error), exclude ...K) (Slice, error)	core#intersect#withoutbyerr	core#intersect#withoutby core#intersect#without core#slice#rejectbyerr	125

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.

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")

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