获取数组键并与php中不同数组中的键进行比较[关闭]

Question

我有一个存储所提供科目的表格和一个存储学生在考试中得分的结果的表格，在使用视图表显示结果时，我希望系统显示一个 (-) 学生没有参加该科目和他正在参加该科目的分数。

存储的主题样本数组为：

Array (
[0] => stdClass Object ( [subCode] => 101 [subName] => English )
[1] => stdClass Object ( [subCode] => 102 [subName] => Kiswahili )
[2] => stdClass Object ( [subCode] => 121 [subName] => Mathematics )
[3] => stdClass Object ( [subCode] => 231 [subName] => Biology )
[4] => stdClass Object ( [subCode] => 232 [subName] => Physics )
[5] => stdClass Object ( [subCode] => 233 [subName] => Chemistry )
[6] => stdClass Object ( [subCode] => 311 [subName] => History )
[7] => stdClass Object ( [subCode] => 312 [subName] => Geography )
[8] => stdClass Object ( [subCode] => 313 [subName] => CRE )
[9] => stdClass Object ( [subCode] => 443 [subName] => Agriculture )
[10] => stdClass Object ( [subCode] => 565 [subName] => Business Studies ) ) 

---

包含要显示的学生结果的数组是：

Array ( [0] => stdClass Object ( [admNo] => 2129 [subCode] => 101 [score] => 78 ) [1] => stdClass Object ( [admNo] => 2129 [subCode] => 102 [score] => 80 ) [2] => stdClass Object ( [admNo] => 2129 [subCode] => 121 [score] => 70 ) [3] => stdClass Object ( [admNo] => 2129 [subCode] => 231 [score] => 76 ) [4] => stdClass Object ( [admNo] => 2129 [subCode] => 233 [score] => 76 ) [5] => stdClass Object ( [admNo] => 2129 [subCode] => 311 [score] => 85 ) [6] => stdClass Object ( [admNo] => 2129 [subCode] => 313 [score] => 90 ) [7] => stdClass Object ( [admNo] => 2129 [subCode] => 565 [score] => 80 ) [8] => stdClass Object ( [admNo] => 4093 [subCode] => 101 [score] => 60 ) [9] => stdClass Object ( [admNo] => 4093 [subCode] => 102 [score] => 70 ) [10] => stdClass Object ( [admNo] => 4093 [subCode] => 121 [score] => 85 ) [11] => stdClass Object ( [admNo] => 4093 [subCode] => 231 [score] => 80 ) [12] => stdClass Object ( [admNo] => 4093 [subCode] => 232 [score] => 80 ) [13] => stdClass Object ( [admNo] => 4093 [subCode] => 233 [score] => 80 ) [14] => stdClass Object ( [admNo] => 4093 [subCode] => 312 [score] => 95 ) [15] => stdClass Object ( [admNo] => 4093 [subCode] => 565 [score] => 86 ) )

---

我需要一个解决方案，其中视图显示 (-)，其中未在 results 数组中找到主题数组中的子代码。

Answer 1

<?php
$subjects = Array (
array ( 'subCode' => 101, 'subName' => 'English' ),
array ( 'subCode' => 102, 'subName' => 'Kiswahili' ),
array ( 'subCode' => 121, 'subName' => 'Mathematics' ),
array ( 'subCode' => 231, 'subName' => 'Biology' ),
array ( 'subCode' => 232, 'subName' => 'Physics' ),
array ( 'subCode' => 233, 'subName' => 'Chemistry' ),
array ( 'subCode' => 311, 'subName' => 'History' ),
array ( 'subCode' => 312, 'subName' => 'Geography' ),
array ( 'subCode' => 313, 'subName' => 'CRE' ),
array ( 'subCode' => 443, 'subName' => 'Agriculture' ),
array ( 'subCode' => 565, 'subName' => 'Business Studies' ) 
) ;



$scores = Array ( '0' => array ( 'admNo' => 2129, 'subCode' => 101, 'score' => 78 ), '1' => array ( 'admNo' => 2129, 'subCode' => 102, 'score' => 80 ), '2' => array ( 'admNo' => 2129, 'subCode' => 121, 'score' => 70 ), '3' => array ( 'admNo' => 2129, 'subCode' => 231, 'score' => 76 ), '4' => array ( 'admNo' => 2129, 'subCode' => 233, 'score' => 76 ), '5' => array ( 'admNo' => 2129, 'subCode' => 311, 'score' => 85 ), '6' => array ( 'admNo' => 2129, 'subCode' => 313, 'score' => 90 ), '7' => array ( 'admNo' => 2129, 'subCode' => 565, 'score' => 80 ), '8' => array ( 'admNo' => 4093, 'subCode' => 101, 'score' => 60 ), '9' => array ( 'admNo' => 4093, 'subCode' => 102, 'score' => 70 ), '10' => array ( 'admNo' => 4093, 'subCode' => 121, 'score' => 85 ), '11' => array ( 'admNo' => 4093, 'subCode' => 231, 'score' => 80 ), '12' => array ( 'admNo' => 4093, 'subCode' => 232, 'score' => 80 ), '13' => array ( 'admNo' => 4093, 'subCode' => 233, 'score' => 80 ), '14' => array ( 'admNo' => 4093, 'subCode' => 312, 'score' => 95 )/*, '15' => array ( 'admNo' => 4093, 'subCode' => 565, 'score' => 86 )*/);

$students =  array(2129,4093);
print_r($students);

function took_test($scores,$admNo, $subj){
    $r = FALSE;
    foreach($scores as $score){
        if($score['subCode'] == $subj && $score['admNo'] == $admNo){
            $r =  "<td>".$score['score']."</td>";
        }
    }
    return $r;
}
?>

<table border="1">
<tr>
<td>Student AdmNo</td>
<?php
foreach($subjects as $subj){
    echo "<td>".$subj['subName']."</td>";
}
?>
</tr>
<?php
foreach($students as $s){
    echo "<tr>";
    echo "<td>".$s."</td>";
    foreach($subjects as $subj){
        if(!took_test($scores,$s,$subj['subCode'])){
            echo "<td>-</td>";
            }else{
            echo took_test($scores,$s,$subj['subCode']);
        }
    }
    echo "</tr>";
}
?>
</table>

<pre><?php
print_r($subjects);

print_r($scores);
?></pre>

请花时间优化此代码

Answer 2

结合数组并根据子代码排序，那么最终数组中只传递一次的元素就是你要找的。​​p>

如果您使用 java，您可以使用 comparable 或 comparator 根据数组中的一个实例进行排序。