PHP：填充陣列

Question

我使用下面從SimpleXML的字符串，它工作正常，到目前爲止創建一個二維數組時，限制項目10：

$dataRaw = array(); 

foreach($objRanking->history as $history) { if($history->groupName == "currentMonth") { 
    $dataRaw[(string)$history->groupName->item] = (int)$history->groupName->groupCount; 
}} 

的數組如下所示：

Array ([item1] => 2 [item2] => 3 [item3] => 5 [item4] => 7 [item5] => 11 [item6] => 13 [item7] => 17 [item8] => 19 [item9] => 23 [item10] => 29 [item11] => 31 [item12] => 37) 

有沒有一種方法，我可以限制這種陣列內最多10個項目，然後總結所有剩餘項目爲[其他]以該值爲剩餘值的總和？

非常感謝任何幫助，邁克。

Answer 1

Initailize計數器，並在每次迭代中不斷遞增。在每次迭代中，檢查計數器是否低於10 - 如果是這樣，像往常一樣將數據添加到數組$dataRaw。當計數器值大於10時，開始將它們添加到新陣列（此處爲$restOfTheItems）。一旦循環完成，您可以簡單地創建一個新的索引，對數組值進行求和並賦值。

$dataRaw = array(); 
$restOfTheItems = array(); 

$i = 0; 
foreach($objRanking->history as $history) { 
    if($i <= 10) { 
     if($history->groupName == "currentMonth") { 
      $dataRaw[(string)$history->groupName->item] = (int)$history->groupName->groupCount; 
     } 
    } else { 
     $restOfTheItems[] = (int)$history->groupName->groupCount; 
    } 
    $i++; 
} 

$dataRaw['Others'] = array_sum($restOfTheItems); 

Answer 2

當然。在事後做切片陣列中的兩個，總結了第二塊，並把它添加到第一：

if (count($dataRaw) > 10) { 
    $firstTen = array_slice($dataRaw, 0, 10, true); 
    $others = array_slice($dataRaw, 10, null, true); 

    $dataRaw = $firstTen; 
    $dataRaw['Others'] = array_sum($others); 
} 

當然，你可以初步處理過程中也做到這一點：

foreach($objRanking->history as $history) { 
    if($history->groupName == "currentMonth") { 
     $groupCount = (int)$history->groupName->groupCount; 
     switch(count($dataRaw)) { 
      case 11: 
       // we already have "Others", so sum the counts 
       $dataRaw['Others'] += $groupCount; 
       break; 
      case 10: 
       // we already have 10 items, so add "Others" 
       $dataRaw['Others'] = $groupCount; 
       break; 
      default: 
       // less than 10 existing items, add one 
       $dataRaw[(string)$history->groupName->item] = $groupCount; 
       break; 
     } 
    } 
}