lo/docs/data/core-pickbyerr.md

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

name	slug	sourceRef	category	subCategory	signatures	variantHelpers	similarHelpers	position
PickByErr	pickbyerr	map.go#L117	core	map	func PickByErr[K comparable, V any, Map ~map[K]V](in Map, predicate func(key K, value V) (bool, error)) (Map, error)	core#map#pickbyerr	core#map#pickby core#map#omitby core#map#omitbyerr	65

Returns a map of the same type filtered by a key/value predicate. Returns an error if the predicate function fails, stopping iteration immediately.

m, err := lo.PickByErr(
    map[string]int{"foo": 1, "bar": 2, "baz": 3},
    func(key string, value int) (bool, error) {
        if key == "bar" {
            return false, fmt.Errorf("bar not allowed")
        }
        return value%2 == 1, nil
    },
)
// map[string]int(nil), error("bar not allowed")

m, err := lo.PickByErr(
    map[string]int{"foo": 1, "bar": 2, "baz": 3},
    func(key string, value int) (bool, error) {
        return value%2 == 1, nil
    },
)
// map[string]int{"foo": 1, "baz": 3}, nil