Update zipObject.md

snippets/zipObject.md

@@ -6,6 +6,6 @@ Since an object can have undefined values but not undefined property pointers, t
 ```js
 const zipObject = (props, values) => props.reduce( ( obj, prop, index ) => (obj[prop] = values[index], obj), {})
 /*
-zipObject(['a','b','c'], [1,2])
+zipObject(['a','b','c'], [1,2]) -> {a: 1, b: 2, c: undefined}
 */
 ```