lo/docs/data/it-sum.md

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

name	slug	sourceRef	category	subCategory	signatures	playUrl	variantHelpers	similarHelpers	position
Sum / SumBy	sum	it/math.go#L59	it	math	func Sum[T constraints.Float | constraints.Integer | constraints.Complex](collection iter.Seq[T]) T func SumBy[T any, R constraints.Float | constraints.Integer | constraints.Complex](collection iter.Seq[T], iteratee func(item T) R) R	https://go.dev/play/p/nHbGFOEIeTa	it#math#sum it#math#sumby	core#slice#sum core#slice#sumby core#slice#product core#slice#productby	10

Sums values from a sequence. SumBy applies a transform and sums the results. Returns 0 for empty sequences.

Examples:

sum := it.Sum(it.RangeFrom(1, 5))
// 1 + 2 + 3 + 4 + 5 == 15

type User struct { Name string; Score int }
users := func(yield func(User) bool) {
    _ = yield(User{"a", 3})
    _ = yield(User{"b", 7})
}
total := it.SumBy(iter.Seq[User](users), func(u User) int { return u.Score })
// total == 10