From 52f9c16e733b7002da0749986ae2f74d1af101b8 Mon Sep 17 00:00:00 2001
From: Isabelle Viktoria Maciohsek <maciv@hotmail.gr>
Date: Mon, 19 Oct 2020 18:52:00 +0300
Subject: [PATCH] Update differenceBy

---
 snippets/differenceBy.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/snippets/differenceBy.md b/snippets/differenceBy.md
index baade057b..e6861d939 100644
--- a/snippets/differenceBy.md
+++ b/snippets/differenceBy.md
@@ -5,7 +5,9 @@ tags: array,intermediate
 
 Returns the difference between two arrays, after applying the provided function to each array element of both.
 
-- Create a `Set` by applying `fn` to each element in `b`, then use `Array.prototype.map()` to apply `fn` to each element in `a`, then `Array.prototype.filter()`
+- Create a `Set` by applying `fn` to each element in `b`.
+- Use `Array.prototype.map()` to apply `fn` to each element in `a`.
+- Use `Array.prototype.filter()` in combination with `fn` on `a` to only keep values not contained in `b`, using `Set.prototype.has()`.
 
 ```js
 const differenceBy = (a, b, fn) => {