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+// Regions Map
+// We want to represent our operational area in memory and store it in a database.
+// The regions will be used in many different ways. We want to be able to manage them and perform different operations on top of them.
+// They will have a label that needs to be unique
+// The top-level hierarchy is pre-defined as Country > State > City,
+// but after City the regions represented could have many different levels: Zones ("Zona Sul"), Neighborhoods ("Moema") or even parts of a Neighborhood.
+
+// brasil
+// ├─ rj
+// │  ├─ buzios
+// │  ├─ marica
+// │  └─ rio-de-janeiro
+// └─ sp
+//    ├─ ...
+//    ├─ osasco
+//      |- centro
+//    └─ sao-paulo
+//       _- santana
+//       ├─ central
+//       ├─ north
+//       │  ├─ santana
+//       │  └─ tucuruvi
+//       ├─ south
+//       │  ├─ moema
+//       │  └─ vila-mariana
+//       └─ west
+//          ├─ butanta
+//             |- vila indiana
+//          └─ pinheiros
+
+area1 = buzios;
+area2 = rio - de - janeiro;
+
+const isDiff = (area1, area2);
+
+const isEqual = (area1, area2) => {
+  if (Object.keys(area1).length !== Object.keys(area2).length) {
+    return false;
+  }
+
+  let result;
+
+  for (const [key, value] of Object.entries(area1)) {
+    const isObj1 = typeof value === 'object';
+    const isObj2 = typeof area2[key] === 'object';
+
+    if (isObj1 && isObj2) {
+      result = result && isEqual(value, area2[key]);
+    }
+
+    if (isObj1 && !isObj2) {
+      result = false;
+      break;
+    }
+
+    if (isObj2 && !isObj1) {
+      result = false;
+      break;
+    }
+
+    // strings
+    if (value !== area2[key]) {
+      result = false;
+      break;
+    }
+  }
+
+  return result;
+};
+
+interface Region {
+  [index: string]: string | Region;
+}
+
+interface City {
+  [index: string]: Region;
+}
+
+interface Country {
+  [index: string]: City;
+}
+
+interface Area {
+  [index: string]: Country;
+}
+
+/**
+ * {
+ * 		brazil: {
+ * 			[state]: {
+ * 				[city]: {
+ * 					[neighborhood]: string | Map<string, string>
+ * 				}
+ * 			}
+ * 		}
+ * }
+ **/