多维数组的递归计数元素 [英] Recursive count elements of multidimensional array
本文介绍了多维数组的递归计数元素的处理方法,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
我尝试使用递归函数来对数组级别上的元素进行计数。但是已经两个小时不能这样做了。检查示例数组:
I try to make recursive function to count elements on array "levels". But can't do that for two hours already. Check example array:
Array (
[0] => Array (
[0] => Array (
[0] => Array ( )
[1] => Array ( )
)
[1] => Array ( )
)
[1] => Array (
[0] => Array (
[0] => Array (
[0] => Array ( )
[1] => Array ( )
)
)
)
)
计算不同级别元素的结果数组将是:
The resulting array that count elements on different levels will be:
Array ([0] => 2, [1] => 3, [2] => 3, [3] => 2)
我制作了用于计算总数组元素的函数,但不知道如何计算每个级别
I made function for count total array elements, but no idea how to count each "level"
function countTotalArr($arr, $lvl) {
if ($lvl != 0) $cnt = 1;
else $cnt = 0; // don't count zero level
for ($i = 0; $i < count($arr); $i++)
$cnt += countArr($arr[$i], $lvl + 1);
return $cnt;
}
$total = countTotalArr($referralsCount, 0);
推荐答案
使用 while
:
// $array is your array at the beginning of iteration
$depthMap = [];
$currentDepth = 0;
while(true) {
$depthMap[$currentDepth] = count($array);
$carry = [];
foreach($array as $item) {
if(is_array($item)) {
$carry = array_merge($carry, $item);
}
}
if(count($carry) < 1) {
break;
}
$array = $carry;
$currentDepth++;
}
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