Make the Collection::times callback optional (#19278)

* Make the Collection::times callback optional

* Add test

* Update Collection.php

Author: CupOfTea696

src/Illuminate/Support/Collection.php

@@ -65,12 +65,16 @@ public static function make($items = [])
      * @param  callable  $callback
      * @return static
      */
-    public static function times($amount, callable $callback)
+    public static function times($amount, callable $callback = null)
     {
         if ($amount < 1) {
             return new static;
         }
 
+        if (is_null($callback)) {
+            return new static(range(1, $amount));
+        }
+
         return (new static(range(1, $amount)))->map($callback);
     }
 

tests/Support/SupportCollectionTest.php

@@ -998,9 +998,12 @@ public function testTimesMethod()
             return 'slug-'.$number;
         });
 
+        $range = Collection::times(5);
+
         $this->assertEquals(['slug-1', 'slug-2'], $two->all());
         $this->assertTrue($zero->isEmpty());
         $this->assertTrue($negative->isEmpty());
+        $this->assertEquals(range(1, 5), $range->all());
     }
 
     public function testConstructMakeFromObject()