[Fix] in eg FF 24, collections lack forEach

Author: ljharb

index.js

@@ -202,16 +202,20 @@ module.exports = function inspect_(obj, options, depth, seen) {
     }
     if (isMap(obj)) {
         var mapParts = [];
-        mapForEach.call(obj, function (value, key) {
-            mapParts.push(inspect(key, obj, true) + ' => ' + inspect(value, obj));
-        });
+        if (mapForEach) {
+            mapForEach.call(obj, function (value, key) {
+                mapParts.push(inspect(key, obj, true) + ' => ' + inspect(value, obj));
+            });
+        }
         return collectionOf('Map', mapSize.call(obj), mapParts, indent);
     }
     if (isSet(obj)) {
         var setParts = [];
-        setForEach.call(obj, function (value) {
-            setParts.push(inspect(value, obj));
-        });
+        if (setForEach) {
+            setForEach.call(obj, function (value) {
+                setParts.push(inspect(value, obj));
+            });
+        }
         return collectionOf('Set', setSize.call(obj), setParts, indent);
     }
     if (isWeakMap(obj)) {