added generic types + FilterChanges

types.go

@@ -0,0 +1,18 @@
+package channel
+
+func DefaultEqualityComparator[T comparable](a, b T) bool {
+	return a == b
+}
+
+type EqualityComparator[T any] = func(a, b T) bool
+type FilterFunc[T any] = func(T) bool
+type Consumer[T any] = func(T)
+type IndexedConsumer[T any] = func(int, T)
+
+type Mapper[I, O any] = func(I) O
+type ErrorMapper[I, O any] = func(I) (O, error)
+
+type MapMapper[T any, K comparable, V any] = func(T) (K, V)
+type MapUnmapper[K comparable, V, T any] = func(K, V) T
+
+type Reducer[A, T any] = func(acc A, value T) A