Laravel 5.3.7 changes (#21)

src/Illuminate/Support/Arr.php

@@ -134,7 +134,13 @@ public static function exists($array, $key)
     public static function first($array, callable $callback = null, $default = null)
     {
         if (is_null($callback)) {
-            return empty($array) ? value($default) : reset($array);
+            if (empty($array)) {
+                return value($default);
+            }
+
+            foreach ($array as $item) {
+                return $item;
+            }
         }
 
         foreach ($array as $key => $value) {

src/Illuminate/Support/Collection.php

@@ -98,7 +98,7 @@ public function median($key = null)
         $values = with(isset($key) ? $this->pluck($key) : $this)
                     ->sort()->values();
 
-        $middle = (int) floor($count / 2);
+        $middle = (int) ($count / 2);
 
         if ($count % 2) {
             return $values->get($middle);
@@ -920,6 +920,23 @@ public function slice($offset, $length = null)
         return new static(array_slice($this->items, $offset, $length, true));
     }
 
+    /**
+     * Split a collection into a certain number of groups.
+     *
+     * @param  int  $numberOfGroups
+     * @return static
+     */
+    public function split($numberOfGroups)
+    {
+        if ($this->isEmpty()) {
+            return new static;
+        }
+
+        $groupSize = ceil($this->count() / $numberOfGroups);
+
+        return $this->chunk($groupSize);
+    }
+
     /**
      * Chunk the underlying collection array.
      *

tests/Support/SupportCollectionTest.php

@@ -1554,6 +1554,54 @@ public function testCollectonFromTraversableWithKeys()
         $collection = new Collection(new \ArrayObject(['foo' => 1, 'bar' => 2, 'baz' => 3]));
         $this->assertEquals(['foo' => 1, 'bar' => 2, 'baz' => 3], $collection->toArray());
     }
+
+    public function testSplitCollectionWithADivisableCount()
+    {
+        $collection = new Collection(['a', 'b', 'c', 'd']);
+
+        $this->assertEquals(
+            [['a', 'b'], ['c', 'd']],
+            $collection->split(2)->map(function (Collection $chunk) {
+                return $chunk->values()->toArray();
+            })->toArray()
+        );
+    }
+
+    public function testSplitCollectionWithAnUndivisableCount()
+    {
+        $collection = new Collection(['a', 'b', 'c']);
+
+        $this->assertEquals(
+            [['a', 'b'], ['c']],
+            $collection->split(2)->map(function (Collection $chunk) {
+                return $chunk->values()->toArray();
+            })->toArray()
+        );
+    }
+
+    public function testSplitCollectionWithCountLessThenDivisor()
+    {
+        $collection = new Collection(['a']);
+
+        $this->assertEquals(
+            [['a']],
+            $collection->split(2)->map(function (Collection $chunk) {
+                return $chunk->values()->toArray();
+            })->toArray()
+        );
+    }
+
+    public function testSplitEmptyCollection()
+    {
+        $collection = new Collection();
+
+        $this->assertEquals(
+            [],
+            $collection->split(2)->map(function (Collection $chunk) {
+                return $chunk->values()->toArray();
+            })->toArray()
+        );
+    }
 }
 
 class TestAccessorEloquentTestStub