From c76ba5d4c45c23269c83bf5d9bfd0ac62f2b8bfb Mon Sep 17 00:00:00 2001
From: Rien Boydens <148046320+rien-rty@users.noreply.github.com>
Date: Mon, 8 Dec 2025 16:18:00 +0100
Subject: [PATCH 1/2] Fixed incorrect index values

---
 index.js |  2 +-
 test.js  | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index f34f074..64a72f8 100644
--- a/index.js
+++ b/index.js
@@ -78,7 +78,7 @@ function replaceString(str, match, fn) {
 
     curCharLen = result[i].length;
     curCharStart += result[i - 1].length;
-    result[i] = fn(result[i], i, curCharStart);
+    result[i] = fn(result[i], (i - 1) / 2, curCharStart);
     curCharStart += curCharLen;
   }
 
diff --git a/test.js b/test.js
index 761d43d..e8ccb7d 100644
--- a/test.js
+++ b/test.js
@@ -170,3 +170,14 @@ test("Avoids undefined values due to regex", (t) => {
     replaceString(string, /(hey)|(you)/, x => x);
   });
 });
+
+test("Indexes start at 0 and are contiguous", t => {
+  const string = 'Hello there general Kenobi';
+  const re = /(\w+)/;
+
+  let expectedIndex = 0;
+  replaceString(string, re, (_, index) => {
+    t.deepEqual(expectedIndex, index);
+    index++;
+  });
+});

From 6ca55efbe88238a78c51f3e7b9ebe03ef06ee852 Mon Sep 17 00:00:00 2001
From: Rien Boydens <rien.boydens@routeyou.com>
Date: Mon, 8 Dec 2025 16:22:29 +0100
Subject: [PATCH 2/2] Fixed test

---
 test.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test.js b/test.js
index e8ccb7d..ab22e88 100644
--- a/test.js
+++ b/test.js
@@ -176,8 +176,8 @@ test("Indexes start at 0 and are contiguous", t => {
   const re = /(\w+)/;
 
   let expectedIndex = 0;
-  replaceString(string, re, (_, index) => {
+  replaceString(string, re, (match, index) => {
     t.deepEqual(expectedIndex, index);
-    index++;
+    expectedIndex++;
   });
 });