Answer created

index.js

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+const testData = {
+  one: {
+    two: 3,
+    four: [5, 6, 7]
+  },
+  eight: {
+    nine: {
+      ten: 11
+    }
+  }
+};
+
+/**
+ * Returns the provided argument, only if it is an array.
+ * Otherwise returns and empty array
+ * @param {any[]} arr list
+ */
+function safeArray(arr) {
+  if (Array.isArray(arr)) return arr;
+
+  return [];
+}
+
+/**
+ * Create an array from a given path
+ * @param {*} currentObject the current "state"
+ * @param {*} parts parts of the path
+ */
+function toArray(currentObject = [], parts) {
+  const [index, value, ...left] = parts;
+  const arr = safeArray(currentObject);
+
+  arr[index] = left.length ? toObject(arr[index], [value, ...left]) : value;
+
+  return arr;
+}
+
+/**
+ * Create an object from a given path
+ * @param {*} currentObject the current "state"
+ * @param {*} parts parts of the path
+ */
+function toObject(currentObject = {}, parts) {
+  const [key, ...left] = parts;
+  const hasNextPath = left.length !== 1;
+
+  if (!isNaN(key)) return toArray(currentObject, parts);
+
+  const newObject = { ...currentObject };
+
+  newObject[key] = hasNextPath ? toObject(currentObject[key], left) : left[0];
+
+  return newObject;
+}
+
+/**
+ * Create an one dimensional object describing all properties of the given item
+ * @param {*} item the object
+ * @param {*} basePath
+ */
+function describeObject(item, basePath = "") {
+  if (typeof item == "object") {
+    return Object.keys(item).reduce(
+      (acc, key) => ({
+        ...acc,
+        ...describeObject(item[key], !basePath ? key : `${basePath}/${key}`)
+      }),
+      {}
+    );
+  }
+
+  return { [basePath]: item };
+}
+
+/**
+ * Create an n-dimensional object given the description object
+ * @param {} objectDescription
+ */
+function objectFromDescription(objectDescription) {
+  const pathParts = Object.keys(objectDescription).map(key => [
+    ...key.split("/"),
+    objectDescription[key]
+  ]);
+
+  return pathParts.reduce(
+    (acc, path) => ({ ...acc, ...toObject(acc, path) }),
+    {}
+  );
+}
+
+const objectDescription = describeObject(testData);
+const object = objectFromDescription(objectDescription);
+
+console.log(objectDescription)
+console.log(JSON.stringify(objectFromDescription(object), null, 2));