lo/docs/data/core-latestbyerr.md

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

name	slug	sourceRef	category	subCategory	playUrl	signatures	variantHelpers	similarHelpers	position
LatestByErr	latestbyerr	find.go#L737	core	find	https://go.dev/play/p/WpBUptwnxuG	func LatestByErr[T any](collection []T, iteratee func(item T) (time.Time, error)) (T, error)	core#find#latestbyerr	core#find#latestby core#find#latest core#find#earliestby core#find#earliestbyerr core#find#earliest core#find#maxby core#find#minby core#find#maxindexby core#find#minindexby core#find#findby core#find#findkeyby core#find#findduplicatesby core#find#finduniquesby	251

Searches a collection for the element with the maximum time extracted by the predicate. Returns zero value when the collection is empty. Stops iteration immediately when an error is encountered.

type Event struct{ At time.Time }
events := []Event{{At: time.Now()}, {At: time.Now().Add(2 * time.Hour)}}
last, err := lo.LatestByErr(events, func(e Event) (time.Time, error) {
    return e.At, nil
})
// Event{At: ...}, nil

// Error case - stops on first error
type Event struct{ At time.Time }
events := []Event{{At: time.Now()}, {At: time.Time{}}, {At: time.Now().Add(2 * time.Hour)}}
_, err := lo.LatestByErr(events, func(e Event) (time.Time, error) {
    if e.At.IsZero() {
        return time.Time{}, fmt.Errorf("zero time not allowed")
    }
    return e.At, nil
})
// error("zero time not allowed")