renovations

1-js/4-data-structures/5-object-for-in/4-multiply-numeric/solution.md

@@ -0,0 +1,27 @@
+
+
+```js
+//+ run
+var menu = {
+  width: 200,
+  height: 300,
+  title: "My menu"
+};
+
+function isNumeric(n) { 
+  return !isNaN(parseFloat(n)) && isFinite(n);
+}
+
+function multiplyNumeric(obj) {
+  for(var key in obj) {
+    if (isNumeric( obj[key] )) {
+      obj[key] *= 2;
+    }
+  }
+}
+
+multiplyNumeric(menu);
+
+alert("menu width="+menu.width+" height="+menu.height+" title="+menu.title);
+```
+