Question

我想在laravel集合中的特定索引之后插入项（数组）。我正在使用此代码：

 foreach ($posts as $key => $post) {
      foreach ($friendsArray as $date => $friend) {
        if ($post->updated_at->format('Y-m-d') == $date) {
            $posts->push($friend);
            $friendsArray->forget($date);
        }
      }
   }

   dd($posts);

结果如下：

#items: array:9 [▼
      0 => Post {#862 ▶}
      1 => Post {#863 ▶}
      2 => Post {#864 ▶}
      3 => Post {#865 ▶}
      4 => Post {#866 ▶}
      5 => Post {#867 ▶}
      6 => Post {#868 ▶}
      7 => Post {#869 ▶}
      8 => Collection {#956 ▶}
    ]

问题是集合帮助推送插入最后一个值，但我想在特定索引后插入。例如，我想在第二个数组之后使用它。

提前致谢

Answer 1

试试这个：

foreach ($posts as $key => $post) {
      foreach ($friendsArray as $date => $friend) {
        if ($post->updated_at->format('Y-m-d') == $date) {
            $post->friend = $friend;
        }
      }
   }

   dd($posts);

Answer 2

您可以使用splice(int $offset, int|null $length = null, mixed $replacement = [])方法。

示例：

// $offset as the postition
// 0 because you don't want to remove any items
// $friend as replacement
$posts->splice($offset, 0, $friend);

请参阅documentation。

在laravel中的特定索引之后在集合中插入数组

2 个答案: