update

1-js/4-data-structures/4-object-for-in/1-is-empty/solution.md

@@ -0,0 +1,20 @@
+
+
+```js
+//+ run
+function isEmpty(obj) { 
+  for(var key in obj) {
+    return false;
+  }
+  return true;
+}
+
+var schedule = {};
+
+alert( isEmpty( schedule ) ); // true
+
+schedule["8:30"] = "подъём";
+
+alert( isEmpty( schedule ) ); // false
+```
+