Merge pull request #139 from chaitanya0bhagvan/master

forEach and map method on the DataSnapshot does not retain key

Author: auser

Diff for: lib/modules/database.js

@@ -35,7 +35,7 @@ class DataSnapshot {
 
   forEach(fn) {
     (this.childKeys || [])
-      .forEach(key => fn(this.value[key]))
+      .forEach(key => fn({key: key, value: this.value[key]}))
   }
 
   map(fn) {
@@ -233,7 +233,7 @@ class DatabaseRef extends ReferenceBase {
     const path = this.dbPath();
     return this.db.off(path, evt, origCB)
       .then(({callback, subscriptions}) => {
-        if (dbSubscriptions[path] && dbSubscriptions[path][evt].length > 0) {
+        if (dbSubscriptions[path] && dbSubscriptions[path][evt] && dbSubscriptions[path][evt].length > 0) {
           return subscriptions;
         }