多维数组中的最小值和最大值 [英] min and max in multidimensional-array
本文介绍了多维数组中的最小值和最大值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
您好,我正在尝试查找x和y的最小值和最大值.如何找到此最小值和最大值函数不能正常工作
hi i am trying to find min and max values of x and y how can i find this min and max functions is not working correctly
$dataPoints = array(
array('x' => 2343, 'y' => 4322),
array('x' => 103, 'y' => 303 ),
array('x' => 2345,'y' => 2321 ),
array('x' => 310, 'y' => 2044 ),
array('x' => 173, 'y' => 793 ),
array('x' => 456, 'y' => 2675),
array('x' => 24, 'y' => 819 ));
推荐答案
我认为您必须编写自己的函数:
I thinik you will have to write your own function:
<?php
function max_with_key($array, $key) {
if (!is_array($array) || count($array) == 0) return false;
$max = $array[0][$key];
foreach($array as $a) {
if($a[$key] > $max) {
$max = $a[$key];
}
}
return $max;
}
$dataPoints = array(
array('x' => 2343, 'y' => 4322),
array('x' => 103, 'y' => 303 ),
array('x' => 2345,'y' => 2321 ),
array('x' => 310, 'y' => 2044 ),
array('x' => 173, 'y' => 793 ),
array('x' => 456, 'y' => 2675),
array('x' => 24, 'y' => 819 ));
$max_x = max_with_key($dataPoints, 'x'); //2343
$max_y = max_with_key($dataPoints, 'y'); //4322
?>
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