From 35c24f924961cfd3064c1a4fcd4e53a59854fb32 Mon Sep 17 00:00:00 2001
From: addielarue <bhasmerutika@gmail.com>
Date: Wed, 9 Sep 2026 11:54:42 +1000
Subject: [PATCH] fix(arrays): avoid empty chunk for even lengths (#5)

---
 src/arrays.js        | 2 +-
 tests/arrays.test.js | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/arrays.js b/src/arrays.js
index ecb604b..f0fb872 100644
--- a/src/arrays.js
+++ b/src/arrays.js
@@ -11,7 +11,7 @@ function sum(arr) {
 /** Splits an array into chunks of the given size. */
 function chunk(arr, size) {
   const result = [];
-  for (let i = 0; i <= arr.length; i += size) {
+  for (let i = 0; i < arr.length; i += size) {
     result.push(arr.slice(i, i + size));
   }
   return result;
diff --git a/tests/arrays.test.js b/tests/arrays.test.js
index 7a71cd6..cc596d1 100644
--- a/tests/arrays.test.js
+++ b/tests/arrays.test.js
@@ -17,3 +17,7 @@ test('sum returns 0 for an empty array', () => {
 test('chunk splits an array into groups of the given size', () => {
   assert.deepEqual(chunk([1, 2, 3, 4, 5], 2), [[1, 2], [3, 4], [5]]);
 });
+
+test('chunk does not append an empty group for evenly divisible arrays', () => {
+  assert.deepEqual(chunk([1, 2, 3, 4], 2), [[1, 2], [3, 4]]);
+});