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                # last方法 返回集合中通過給定真實測試的最后一個元素。 ``` collect([1, 2, 3, 4])->last(function ($value, $key) { return $value < 3; }); // 2 ``` 你也可以不傳入參數調用 `last` 方法來獲取集合中最后一個元素。如果集合是空的,返回 `null`: ``` collect([1, 2, 3, 4])->last(); // 4 ``` > 如果需要返回第一個元素可以使用[first()](/collections/first.md)方法。
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