我有这个数组(它只是其中的一部分)。 6 =问题ID,optionIDs =可能的答案。
Array
(
[3] => Array
(
[0] => 6
[1] => Array
(
[0] => Array
(
[optionID] => 16
[isCorrect] => 0
)
[1] => Array
(
[optionID] => 14
[isCorrect] => 1
)
[2] => Array
(
[optionID] => 15
[isCorrect] => 0
)
[3] => Array
(
[optionID] => 17
[isCorrect] => 0
)
)
)
[7] => Array
(
[0] => 6
[1] => Array
(
[0] => Array
(
[optionID] => 16
[isCorrect] => 0
)
[1] => Array
(
[optionID] => 15
[isCorrect] => 0
)
[2] => Array
(
[optionID] => 17
[isCorrect] => 0
)
[3] => Array
(
[optionID] => 14
[isCorrect] => 1
)
)
)
)
我试图将冗余问题(6和6)与array_map合并:
$unique = array_map('unserialize', array_unique(array_map('serialize', $quizQuestionArray)));
只要optionID的顺序相同,它就可以正常工作。但在某些情况下(比如这里),他们被改组(16,14,15,17)(16,15,17,14)。有没有办法让他们洗牌并删除重复的问题?
答案 0 :(得分:2)
array_map-serialize是一种重复删除数组的粗略方法。你应该使用这样的东西:
$dupeIds = [];
$array = array_filter($array, function ($item) use (&$dupeIds) {
$keep = !isset($dupeIds[$item[0]]);
$dupeIds[$item[0]] = true;
return $keep;
});
答案 1 :(得分:1)
在应用array_map()函数之前,您需要将它们排序为相同的顺序。您可以使用uasort()函数并提供您自己的比较函数,如下所示:
// Example array
$array = array(
3 => array(
0 => 6,
1 => array(
0 => array(
'optionID' => 16,
'isCorrect' => 0
),
1 => array(
'optionID' => 14,
'isCorrect' => 1
),
2 => array(
'optionID' => 15,
'isCorrect' => 0
),
3 => array(
'optionID' => 17,
'isCorrect' => 0
),
)
),
7 => array(
0 => 6,
1 => array(
0 => array(
'optionID' => 16,
'isCorrect' => 0
),
1 => array(
'optionID' => 15,
'isCorrect' => 0
),
2 => array(
'optionID' => 17,
'isCorrect' => 0
),
3 => array(
'optionID' => 14,
'isCorrect' => 1
),
)
)
);
// You can supply parts of an array to uasort()
// uasort() will modify your array but keep your keys.
uasort($array[3][2], 'sort_by_optionid');
uasort($array[7][3], 'sort_by_optionid');
function sort_by_optionid($a, $b) {
if ($a['optionID'] === $b['optionID']) {
return 0;
} else if ($a['optionID'] > $b['optionID']) {
return 1;
} else {
return -1;
}
}
// Done.
现在保存了密钥,您可以轻松地使用array_map()查找重复项,然后根据密钥再次排序回原始状态。例如。 uksort()