slicexp

func Contains[TSource comparable](source []*TSource, item *TSource) bool

func CountBy[TSource any](source []*TSource, predicate func(*TSource) bool) int

func Distinct[TSource comparable](source []*TSource, keySelector func(*TSource) TSource) []TSource

func DistinctBy[TSource any, TKey comparable](source []*TSource, keySelector func(*TSource) TKey) []TKey

func Filter[TSource any](source []*TSource, predicate func(*TSource) bool) []*TSource

func First[TSource any](source []TSource, predicate func(TSource) bool) (TSource, bool)

func FirstOrNil[TSource any](source []*TSource, predicate func(*TSource) bool) *TSource

func GroupBy[TSource any, TKey comparable](source []TSource, keySelector func(TSource) TKey) map[TKey][]TSource

func Map[TSource any, TResult any](source []*TSource, selector func(*TSource) TResult) []TResult

func MapMany[TSource any, TResult any](source []*TSource, selector func(*TSource) []TResult) []TResult

func Sum[TSource any](source []*TSource, selector func(*TSource) int) int

func ToHashSet[TSource any, TKey comparable](source []*TSource, keySelector func(*TSource) TKey) map[TKey]struct{}

func ToMap[TSource any, TKey comparable](source []*TSource, keySelector func(*TSource) TKey) map[TKey]*TSource