如何删除集合中的重复项? [英] How to remove duplicates in collection?

问题描述

我在Laravel有收藏品

I have collection in Laravel:

Collection {#450 ▼
  #items: array:2 [▼
    0 => Announcement {#533 ▶}
    1 => Announcement {#553 ▶}
  ]
}

是相同的项目.如何删除其中之一?

It is the same items. How ti delete one of them?

完整代码是:

public function announcements()
    {

        $announcements = $this->categories_ann->map(function ($c) {
            return $c->announcements->map(function ($a) {
                $a->subsribed = true;

                return $a;
            });
        });

        $flattened = $announcements->groupBy("id")->flatten();

        return $flattened;
    }

推荐答案

$unique = $collection->unique();

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