Question

我必须对一组名为＆＃34; contents＆＃34;的对象进行排序，如下所示：

"articles" => array:106 [▼
  0 => array:5 [▼
    "id" => 467823568
    "title" => "my tittle"
    "data" => "my data"
    "category" => 23
    "order" => 2
  ]
  1 => array:5 [▼
    "id" => 46782356433
    "title" => "my tittle 2"
    "data" => "my data 2"
    "category" => 25
    "order" => 1
  ]
  ...
]

订单以2个数组定义，category_o和order_o如下所示：

"category_o" => array:21 [▼
      0 => 25
      1 => 95
      2 => 135
      3 => 72
      4 => 4
      5 => 23
      6 => 7
      7 => 803
      ...
]

我希望根据属性排序文章＆＃34; category＆＃34;使用category_o数组中指定的自定义顺序，然后按属性＆＃34; order＆＃34;进行第二次排序。使用order_o中指定的其他自定义订单。

要对文章进行排序，我使用uasort方法：

// Call sort function
uasort($articles,  array($this, "sortByCategoryOrder"));

使用我的自定义函数sortByCategoryOrder($left, $right);：

function sortByCategoryOrder($leftItem, $rightItem){
    // Array that contains order
    $order = $this->category_o; 
    // Exchange key with value, so we can access "position by value"
    $flipped = array_flip($order); 
    // Init default value for position
    $rightPos = 0;
    $leftPos = 0;

    // Check if order of current category is present:
    // the $category_o array could not have all order
    // values of articles
    if ( (array_key_exists($leftItem["category"], $flipped)) && (array_key_exists($rightItem["category"], $flipped)) ){
      // NO MISSING: the 2 element have order
      $leftPos = $flipped[$leftItem["category"]];
      $rightPos = $flipped[$rightItem["category"]];

    }else if (array_key_exists($leftItem["category"], $flipped)) {
        // MISS RIGHT: the right elmenet has not custom order specified! 
        $leftPos = $flipped[$leftItem["category"]];
        $rightPos = $leftPos+1;

    }else if (array_key_exists($rightItem["category"], $flipped)){
        // MISS LEFT: the left elmenet has not custom order specified! 
        $rightPos = $flipped[$rightItem["category"]];
        $leftPos = $rightPos+1;        

    }else{
        // MISS LEFT AND RIGHT: the 2 articles have no custom order specified!            
        $rightPos = 99999;
        $leftPos = 99999;
    }

    // Make the comparation
    return $leftPos >= $rightPos;   
}

我有一个名为sortByOrder($left, $right);的第二个函数，它按order_o数组值对文章进行排序。

需要 12秒来排序ca. 2000篇文章。 uasort真的很慢或我在自定义订单功能中犯了一些错误吗？感谢

解决方案：

感谢@Ahmad Hajjar，我找到了正确的解决方案。

我写了另一种方法，为每个内容设置新属性category_o和order_o，并使用双自然升序和php的方法{{ 1}}。性能提升，并且当前 2000篇文章从ca.传递 9秒到大约1秒！

我报告了我的新方法，希望它有希望：

array_multisort()

Answer 1

我认为这是模型设计问题。我会改变我的模型来存储category_o排名以及类别值和order_o排名及其值，然后从你需要的任何数据中获取它们...所以当你从数据库中获取数组时你会得到它像这样

"articles" => array:106 [▼
  0 => array:5 [▼
    "id" => 467823568
    "title" => "my tittle"
    "data" => "my data"
    "category" => 23
    "category_o" => 5
    "order" => 2
    "order_o" => 1
  ]
  1 => array:5 [▼
    "id" => 46782356433
    "title" => "my tittle 2"
    "data" => "my data 2"
    "category" => 25
    "category_o" => 0
    "order" => 1
    "order_o" => 2
  ]
  ...
]

uasort使用自定义顺序

1 个答案: