Functions for slice transformations in go

slices.go

func Reduce[TAcc any, T any](list []T, reducer func(TAcc, T) TAcc, init TAcc) TAcc {
	acc := init

	for _, t := range list {
		acc = reducer(acc, t)
	}

	return acc
}

func Map[T any, TRet any](list []T, mapper func(T) TRet) []TRet {
	n := make([]TRet, len(list))

	for i, iter := range list {
		n[i] = mapper(iter)
	}

	return n
}

func Filter[T any](list []T, filter func(t T) bool) []T {
	// Set the capacity to the max and trim it down later.
	n := make([]T, 0, len(list))

	for _, iter := range list {
		if filter(iter) {
			n = append(n, iter)
		}
	}

	return slices.Clip(n)
}