add mapInto method

src/Illuminate/Support/Collection.php

@@ -821,6 +821,19 @@ public function flatMap(callable $callback)
         return $this->map($callback)->collapse();
     }
 
+    /**
+     * Map the values into a new class.
+     *
+     * @param  string  $class
+     * @return static
+     */
+    public function mapInto($class)
+    {
+        return $this->map(function ($value, $key) use ($class) {
+            return new $class($value, $key);
+        });
+    }
+
     /**
      * Get the max value of a given key.
      *

tests/Support/SupportCollectionTest.php

@@ -1209,6 +1209,18 @@ public function testMapWithKeysCallbackKey()
         );
     }
 
+    public function testMapInto()
+    {
+        $data = new Collection([
+            'first', 'second',
+        ]);
+
+        $data = $data->mapInto(TestCollectionMapIntoObject::class);
+
+        $this->assertEquals('first', $data[0]->value);
+        $this->assertEquals('second', $data[1]->value);
+    }
+
     public function testNth()
     {
         $data = new Collection([
@@ -2200,3 +2212,13 @@ public function jsonSerialize()
         return ['foo' => 'bar'];
     }
 }
+
+class TestCollectionMapIntoObject
+{
+    public $value;
+
+    public function __construct($value)
+    {
+        $this->value = $value;
+    }
+}