From 31dbc46a75d18bdccc6183994e68f1cbd90953ca Mon Sep 17 00:00:00 2001
From: Mohammad Sadeq Khoshnazar <mskhoshnazar@gmail.com>
Date: Sun, 10 Jan 2021 12:57:45 +0330
Subject: [PATCH 1/4] add reduce with keys to collections

---
 src/Illuminate/Collections/Collection.php | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/Illuminate/Collections/Collection.php b/src/Illuminate/Collections/Collection.php
index f4c7b4007a91..fd51e5de5ed8 100644
--- a/src/Illuminate/Collections/Collection.php
+++ b/src/Illuminate/Collections/Collection.php
@@ -884,6 +884,24 @@ public function reduce(callable $callback, $initial = null)
         return array_reduce($this->items, $callback, $initial);
     }
 
+    /**
+     * Reduce an associative collection to a single value.
+     *
+     * @param  callable  $callback
+     * @param  mixed $initial
+     * @return mixed
+     */
+    public function reduceWithKeys(callable $callback, $initial = null)
+    {
+        $result = $initial;
+
+        foreach($this->items as $key => $value) {
+            $result = $callback($result, $value, $key);
+        }
+
+        return $result;
+    }
+
     /**
      * Replace the collection items with the given items.
      *

From 4777a5415758f05049ee12765b66f71980bc0681 Mon Sep 17 00:00:00 2001
From: Mohammad Sadeq Khoshnazar <mskhoshnazar@gmail.com>
Date: Sun, 10 Jan 2021 12:58:03 +0330
Subject: [PATCH 2/4] add reduce with keys to lazy collections

---
 src/Illuminate/Collections/LazyCollection.php | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/Illuminate/Collections/LazyCollection.php b/src/Illuminate/Collections/LazyCollection.php
index 2384948f951a..4474ab863db5 100644
--- a/src/Illuminate/Collections/LazyCollection.php
+++ b/src/Illuminate/Collections/LazyCollection.php
@@ -845,6 +845,24 @@ public function reduce(callable $callback, $initial = null)
         return $result;
     }
 
+    /**
+     * Reduce an associative collection to a single value.
+     *
+     * @param  callable  $callback
+     * @param  mixed $initial
+     * @return mixed
+     */
+    public function reduceWithKeys(callable $callback, $initial = null)
+    {
+        $result = $initial;
+
+        foreach($this as $key => $value) {
+            $result = $callback($result, $value, $key);
+        }
+
+        return $result;
+    }
+
     /**
      * Replace the collection items with the given items.
      *

From 1b788e795621cba583803d36b2ef9d92674ba330 Mon Sep 17 00:00:00 2001
From: Mohammad Sadeq Khoshnazar <mskhoshnazar@gmail.com>
Date: Sun, 10 Jan 2021 12:58:21 +0330
Subject: [PATCH 3/4] add test for reduce with keys

---
 tests/Support/SupportCollectionTest.php | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/Support/SupportCollectionTest.php b/tests/Support/SupportCollectionTest.php
index 6faf65a1a3c2..a75d555c0749 100755
--- a/tests/Support/SupportCollectionTest.php
+++ b/tests/Support/SupportCollectionTest.php
@@ -3592,6 +3592,20 @@ public function testReduce($collection)
         }));
     }
 
+    /**
+     * @dataProvider collectionClassProvider
+     */
+    public function testReduceWithKeys($collection)
+    {
+        $data = new $collection([
+            'foo' => 'bar',
+            'baz' => 'qux',
+        ]);
+        $this->assertEquals('foobarbazqux', $data->reduceWithKeys(function ($carry, $element, $key) {
+            return $carry .= $key . $element;
+        }));
+    }
+
     /**
      * @dataProvider collectionClassProvider
      */

From b84aaecb413b35ad1990c4210e2498df494a3895 Mon Sep 17 00:00:00 2001
From: Mohammad Sadeq Khoshnazar <mskhoshnazar@gmail.com>
Date: Sun, 10 Jan 2021 13:15:19 +0330
Subject: [PATCH 4/4] fix style

---
 src/Illuminate/Collections/Collection.php     | 2 +-
 src/Illuminate/Collections/LazyCollection.php | 2 +-
 tests/Support/SupportCollectionTest.php       | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/Illuminate/Collections/Collection.php b/src/Illuminate/Collections/Collection.php
index fd51e5de5ed8..6a8ab88818aa 100644
--- a/src/Illuminate/Collections/Collection.php
+++ b/src/Illuminate/Collections/Collection.php
@@ -895,7 +895,7 @@ public function reduceWithKeys(callable $callback, $initial = null)
     {
         $result = $initial;
 
-        foreach($this->items as $key => $value) {
+        foreach ($this->items as $key => $value) {
             $result = $callback($result, $value, $key);
         }
 
diff --git a/src/Illuminate/Collections/LazyCollection.php b/src/Illuminate/Collections/LazyCollection.php
index 4474ab863db5..ca51626b071e 100644
--- a/src/Illuminate/Collections/LazyCollection.php
+++ b/src/Illuminate/Collections/LazyCollection.php
@@ -856,7 +856,7 @@ public function reduceWithKeys(callable $callback, $initial = null)
     {
         $result = $initial;
 
-        foreach($this as $key => $value) {
+        foreach ($this as $key => $value) {
             $result = $callback($result, $value, $key);
         }
 
diff --git a/tests/Support/SupportCollectionTest.php b/tests/Support/SupportCollectionTest.php
index a75d555c0749..b622884fe6c1 100755
--- a/tests/Support/SupportCollectionTest.php
+++ b/tests/Support/SupportCollectionTest.php
@@ -3602,7 +3602,7 @@ public function testReduceWithKeys($collection)
             'baz' => 'qux',
         ]);
         $this->assertEquals('foobarbazqux', $data->reduceWithKeys(function ($carry, $element, $key) {
-            return $carry .= $key . $element;
+            return $carry .= $key.$element;
         }));
     }