added OfMap

of.go

@@ -51,3 +51,19 @@ func OfFunc[T any](ctx context.Context, buffer int, f func() T) <-chan T {
 
 	return out
 }
+
+// OfMap returns a channel containing the return values of the unmapper function
+// applied to any key-value pair in m
+// The order is random
+func OfMap[K comparable, V, T any](m map[K]V, unmapper func(K, V) T) <-chan T {
+	out := make(chan T, len(m))
+
+	defer func() {
+		defer close(out)
+		for k, v := range m {
+			out <- unmapper(k, v)
+		}
+	}()
+
+	return out
+}