From d0b6531c456468bdd7c5fdf2dab17ca5998e4a20 Mon Sep 17 00:00:00 2001
From: Danny Feliz <dannyfeliz08@gmail.com>
Date: Mon, 11 Dec 2017 21:28:20 -0400
Subject: [PATCH 1/2] =?UTF-8?q?Replace=20the=20usage=20of=20=C3=ACndexOf`?=
 =?UTF-8?q?=20for=20`includes`?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index 9b166f0f6..eb2e006d0 100644
--- a/README.md
+++ b/README.md
@@ -109,11 +109,11 @@ var curry = f =>
 
 ### Difference between arrays
 
-Use `filter()` to remove values that are part of `values`, determined using `indexOf()`.
+Use `filter()` to remove values that are part of `values`, determined using `includes()`.
 
 ```js
 var difference = (arr, values) =>
-  arr.filter(v => values.indexOf(v) === -1);
+  arr.filter(v => !values.includes(v));
 ```
 
 ### Distance between two points
@@ -315,11 +315,11 @@ var scrollToTop = _ => {
 
 ### Similarity between arrays
 
-Use `filter()` to remove values that are not part of `values`, determined using `indexOf()`.
+Use `filter()` to remove values that are not part of `values`, determined using `includes()`.
 
 ```js
 var difference = (arr, values) =>
-  arr.filter(v => values.indexOf(v) !== -1);
+  arr.filter(v => values.includes(v));
 ```
 
 ### Sort characters in string (alphabetical)
@@ -359,12 +359,12 @@ var tail = arr => arr.slice(1);
 ### Unique values of array
 
 Use `reduce()` to accumulate all unique values in an array.
-Check if each value has already been added, using `indexOf()` on the accumulator array.
+Check if each value has already been added, using `includes()` on the accumulator array.
 
 ```js
 var uniqueValues = arr =>
   arr.reduce( (acc, val) => {
-    if(acc.indexOf(val) === -1)
+    if(acc.indexOf(val))
       acc.push(val);
       return acc;
   }, []);

From e28bd9a95ff0d8b9841ac96b273aea006eaa7684 Mon Sep 17 00:00:00 2001
From: Danny Feliz <dannyfeliz08@gmail.com>
Date: Mon, 11 Dec 2017 21:32:47 -0400
Subject: [PATCH 2/2] =?UTF-8?q?eplace=20the=20usage=20of=20=C3=ACndexOf`?=
 =?UTF-8?q?=20for=20`includes`?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index eb2e006d0..4a3214633 100644
--- a/README.md
+++ b/README.md
@@ -364,7 +364,7 @@ Check if each value has already been added, using `includes()` on the accumulato
 ```js
 var uniqueValues = arr =>
   arr.reduce( (acc, val) => {
-    if(acc.indexOf(val))
+    if(!acc.includes(val))
       acc.push(val);
       return acc;
   }, []);