之后填充缺失值的数组

在后端脚本我的测试阵列看起来像这样：

Array 
(
    [0] => Array 
     (
      [0] => 6 
      [1] => 1 
     ) 

    [1] => Array 
     (
      [0] => 7 
      [1] => 7 
     ) 

    [2] => Array 
     (
      [0] => 8 
      [1] => 37 
     ) 

    [3] => Array 
     (
      [0] => 9 
      [1] => 44 
     ) 
)

值与偏移[0]表示的小时。现在我每小时需要24个数组对象。如何在不触及给定元素的情况下保持这一点？

例如

Array 
(
    [0] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [6] => Array 
     (
      [0] => 6 
      [1] => 1 
     ) 
    [...] 
    [7] => Array 
     (
      [0] => 7 
      [1] => 7 
     ) 

    [8] => Array 
     (
      [0] => 8 
      [1] => 37 
     ) 

    [9] => Array 
     (
      [0] => 9 
      [1] => 44 
     )

在此先感谢。

来源

2015-08-14 cr1zz

那么，每个子阵列中的第一个元素是小时？你是否用SQL查询拉出这些数据？可能效率更高一些 - 例如你正在使用PDO，你可以用很多功能来改变结果集，比如'$ stmt-> fetchAll（PDO :: FETCH_FUNC，function（$ a，$ b ）{/ * ... * /}）;' –

解决方案对我来说：

while ($stmt->fetch()) { 
    $x = $hour; 
    $y = $zugriffe; 
    $data1[$x] = array ($x, $y); 
} 

for ($i=0;$i<=24;$i++){ 
    if (!isset($data1[$i])){ 
     $data1[$i] = array ($i,0); 
    } 
} 
sort($data1);

来源

2015-08-14 11:20:33 cr1zz

假设数组的名称为$一个，你可以这样做：

for($i = 0; $i < 24; $i++) { 
    if(isset($a[$i])) continue; 
    else { 
     $a[$i] = array($i,"something you like here"); 
    } 
}

来源

2015-08-14 10:59:00

你要根据第一子阵列值“重新键”这个结果集，然后将其合并到一个数组24小时元素。

尝试这种情况：

$data = [ 
    [6, 1], 
    [7, 7], 
    [8, 37], 
    [9, 44] 
]; 

$hours = array_fill(0, 25, [0, 0]); 
$data = array_combine(array_column($data, 0), $data); 
$hours = array_replace($hours, $data); 

print_r($hours);

此：

创建包含包含默认值[0, 0]
重新键您$data，拉出并使用子阵列24元件阵列$hours每个子数组的第一个值就是这样做的。这假定你正在使用PHP 5.5。
最后，更换改良$data到$hours

这产生了：

Array 
(
    [0] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [1] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [2] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [3] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [4] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [5] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [6] => Array 
     (
      [0] => 6 
      [1] => 1 
     ) 

    [7] => Array 
     (
      [0] => 7 
      [1] => 7 
     ) 

    [8] => Array 
     (
      [0] => 8 
      [1] => 37 
     ) 

    [9] => Array 
     (
      [0] => 9 
      [1] => 44 
     ) 

    [10] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [11] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [12] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [13] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [14] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [15] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [16] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [17] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [18] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [19] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [20] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [21] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [22] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

    [23] => Array 
     (
      [0] => 0 
      [1] => 0 
     ) 

)

希望这有助于:)

来源

2015-08-14 11:13:54

如果您没有使用PHP 5.5，请查看[array_column（）]的PHP实现（https://github.com/ramsey/array_column/blob/ master/src/array_column.php）H/T到@AbraCadaver –

你可以试试还有这个：

// yours test array 
    $times = array(
     array(6,1), 
     array(7,7), 
     array(8,37), 
     array(9,44) 
    ); 

    // array with all hours 
    $fullTimes = array_fill(0, 24, array(0,0)); 

    foreach ($times as $time) { 
     $fullTimes[$time[0]] = $time; 
    }

来源

2015-08-14 11:24:21 arbogastes

之后填充缺失值的数组

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