Added reverse map

momap/rev.go

@@ -0,0 +1,9 @@
+package momap
+
+func ReverseMap[K, V comparable](m map[K]V) map[V]K {
+	revMap := make(map[V]K)
+	for k, v := range m {
+		revMap[v] = k
+	}
+	return revMap
+}