Travis build: 342 [cron]

snippet_data/snippets.json

@@ -995,6 +995,26 @@
         "hash": "31714831376eeddd863a295af778632f584468745fbeb4e9a6f62b5275ea3562"
       }
     },
+    {
+      "id": "deepFreeze",
+      "type": "snippet",
+      "attributes": {
+        "fileName": "deepFreeze.md",
+        "text": "Deep freezes an object.\n\nCalls `Object.freeze(obj)` recursively on all unfrozen properties of passed object that are `instanceof` object.",
+        "codeBlocks": [
+          "const deepFreeze = obj =>\n  Object.keys(obj).forEach(\n    prop =>\n      !obj[prop] instanceof Object || Object.isFrozen(obj[prop]) ? null : deepFreeze(obj[prop])\n  ) || Object.freeze(obj);",
+          "'use strict';\n\nconst o = deepFreeze([1, [2, 3]]);\n\no[0] = 3; // not allowed\no[1][0] = 4; // not allowed as well"
+        ],
+        "tags": [
+          "object",
+          "recursion"
+        ]
+      },
+      "meta": {
+        "archived": false,
+        "hash": "24b3dd66c4b69577d70917ba4f0c119a7ad21497d18704b7150c3693673b5e53"
+      }
+    },
     {
       "id": "defaults",
       "type": "snippet",

test/deepFreeze/deepFreeze.js

@@ -1,17 +1,6 @@
-const deepFreeze = obj => {
-  Object.freeze(obj);
-
-  Object.getOwnPropertyNames(obj).forEach(function(prop) {
-    if (
-      obj.hasOwnProperty(prop) &&
-      obj[prop] !== null &&
-      (typeof obj[prop] === 'object' || typeof obj[prop] === 'function') &&
-      !Object.isFrozen(obj[prop])
-    ) {
-      deepFreeze(obj[prop]);
-    }
-  });
-
-  return obj;
-};
+const deepFreeze = obj =>
+  Object.keys(obj).forEach(
+    prop =>
+      !obj[prop] instanceof Object || Object.isFrozen(obj[prop]) ? null : deepFreeze(obj[prop])
+  ) || Object.freeze(obj);
 module.exports = deepFreeze;