我有多层面的阵容。
$array[0] = array(1, 8, 2);
$array[1] = array(5, 6, 15);
$array[2] = array(-8, 2, 1025);
我想知道,用哪一种最有效率的方式来命令母体阵列的特定财产。 例如,我想将其按次美元=1.1美元计算,因此将命令母体阵列21,01美元。
我有多层面的阵容。
$array[0] = array(1, 8, 2);
$array[1] = array(5, 6, 15);
$array[2] = array(-8, 2, 1025);
我想知道,用哪一种最有效率的方式来命令母体阵列的特定财产。 例如,我想将其按次美元=1.1美元计算,因此将命令母体阵列21,01美元。
http://ca3.php。 (以钥匙分类)。 你们不得不打着自己的热情,来做你们想要做的事情。
function sort_by_subarray($a, $b)
{
// $a and $b are elements of $array that are being compared against
// each other to be sorted
if (!isset($a[1]) || !isset($b[1]))
{
// Do something if $a[1] or $b[1] is undefined
// Your question doesn t define what the behaviour here should be
}
else
{
if ($a[1] == $b[1]) return 0; // the elements are the same
return ($a[1] < $b[1]) ? -1 : 1; // otherwise, sort from lowest to highest
}
}
$array = array(
array(1, 8, 2),
array(5, 6, 15),
array(-8, 2, 1025)
);
uasort($array, "sort_by_subarray");
/* Results in:
Array
(
[2] => Array
(
[0] => -8
[1] => 2
[2] => 1025
)
[1] => Array
(
[0] => 5
[1] => 6
[2] => 15
)
[0] => Array
(
[0] => 1
[1] => 8
[2] => 2
)
)
*/
请注意,如果亚拉伊女士是平等的,那么我的职能将分两条,这样,如果你想更具体的话,你就可以在<代码>(a)美元=b***时添加更多的规则。
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