Question

所以我在接受采访时提出了一个问题：它说的是：在所有条件下找到平均得分最高的轮胎，如果轮胎在任何情况下的得分都低于5，那么它就会被取消资格。

tf.gather(input, index)

输出显示：注意： C：\ xampp中的数组到字符串转换... Array是得分最好的轮胎：7.3333333333333

问题是如何显示名称＆＃39; RainForest＆＃39;而不是＆＃39;数组＆＃39;

谢谢

Answer 1

你有令人困惑的名字，修复它们：

$tires=[
  'Desert'=>array('dry'=>10, 'wet'=>4, 'snow'=>1),  
  'Ocean'=>array('dry'=>6, 'wet'=>8, 'snow'=>6),  
  'RainForest'=>array('dry'=>6, 'wet'=>10, 'snow'=>6),  
  'Glacier'=>array('dry'=>4, 'wet'=>9, 'snow'=>10),  
  'Prairie'=>array('dry'=>7, 'wet'=>7, 'snow'=>7),  
];
$max=0;
foreach($tires as $tire => $conditions){ // note key and value
    $total=0;
    foreach($conditions as $condition => $score){ // note array name
        if($score>5){
            $total=$total+$score;
        }else{
            $total=-150000;
        }
    }
    $total=$total/3;
    if($total>$max){
        $max=$total;
        $bestTire = $tire; // note key name
    }
}
echo $bestTire." is the best tire with the score: ".$max;

Answer 2

试试这个：

$minimumScore = 5;

// remove tires that have a single rating less than minimum
$filtered = array_filter($tires, function (array $data) use ($minimumScore) {
    return min($data) >= $minimumScore;
});

// calculate scores as average of score per category
$scores = array_map(function (array $data) {
    return array_sum($data) / count($data);
}, $filtered);

// find maximum of scores
$bestScore = max($scores);

// find keys with the best score
$bestTires = array_keys($scores, $bestScore);

// there could be more than one tire with same score, pick the first
$bestTire = array_shift($bestTires);

echo sprintf(
    '%s is the best tire with the score: %s',
    $bestTire,
    $bestScore
);

供参考，见：

有关示例，请参阅：

https://3v4l.org/5L5Xn

Answer 3

您应该了解foreach()的工作原理。

foreach($tires as $key => $value) {
    // $key is your tire name
    // $value is the array of data for that tire
}

如何在另一个数组中显示数组的名称

3 个答案: