Re-tag array snippets

snippets/differenceBy.md

@@ -1,6 +1,6 @@
 ---
 title: differenceBy
-tags: array,function,intermediate
+tags: array,intermediate
 ---
 
 Returns the difference between two arrays, after applying the provided function to each array element of both.
@@ -17,4 +17,4 @@ const differenceBy = (a, b, fn) => {
 ```js
 differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor); // [1]
 differenceBy([{ x: 2 }, { x: 1 }], [{ x: 1 }], v => v.x); // [2]
-```
+```