PHP 数组比较合并,求效率
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2024-02-13 13:30:10
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php 数组 $arr1 = array(1, 3, 5, 9,34,128,129);
$arr2 = array(1, 3, 6, 22,33, 128);
$arr3 = array(128,78,56,33,5,1);
想得到的结果是:
$res = array(1,128,3,5,33,9,34,129,6,22,78,56);
规则是:将3数组合并,重复度最高的往前放
//$arr1 $arr2 $arr3一定是desc就是asc排列
//如果只有$arr1和$arr2两个排序呢,或是再添个$arr4呢
//Thanks~
(
[0] => 1
[1] => 128
[2] => 5
[3] => 33
[4] => 3
[5] => 78
[6] => 56
[7] => 22
[8] => 129
[9] => 9
[10] => 34
[11] => 6
)
仅用内饰函数虽然快,但并不完全符合你的要求
所以还需要自己写点代码
(
[0] => 1
[1] => 128
[2] => 3
[3] => 5
[4] => 33
[5] => 9
[6] => 34
[7] => 129
[8] => 6
[9] => 22
[10] => 78
[11] => 56
)
$arr2 = array(1, 3, 6, 22,33, 128);
$arr3 = array(128,78,56,33,5,1);
想得到的结果是:
$res = array(1,128,3,5,33,9,34,129,6,22,78,56);
规则是:将3数组合并,重复度最高的往前放
//$arr1 $arr2 $arr3一定是desc就是asc排列
//如果只有$arr1和$arr2两个排序呢,或是再添个$arr4呢
//Thanks~
回复讨论(解决方案)
$arr1 = array(1, 3, 5, 9,34,128,129);$arr2 = array(1, 3, 6, 22,33, 128);$arr3 = array(128,78,56,33,5,1);$t = array_count_values(array_merge($arr1, $arr2, $arr3));arsort($t);print_r(array_keys($t));Array
(
[0] => 1
[1] => 128
[2] => 5
[3] => 33
[4] => 3
[5] => 78
[6] => 56
[7] => 22
[8] => 129
[9] => 9
[10] => 34
[11] => 6
)
仅用内饰函数虽然快,但并不完全符合你的要求
所以还需要自己写点代码
$t = array_count_values(array_merge($arr1, $arr2, $arr3));$res = array();for($max=max($t); $max>0; $max--) $res = array_merge($res, array_keys($t, $max));print_r($res);Array
(
[0] => 1
[1] => 128
[2] => 3
[3] => 5
[4] => 33
[5] => 9
[6] => 34
[7] => 129
[8] => 6
[9] => 22
[10] => 78
[11] => 56
)
嗯,明白,还是版主给力啊~我昨晚也生搬硬套一个,
array_diff不给力啊,所以如此冗余
$arr1 = array(1,2,3,4,5,6,7,8,9,10);$arr2 = array(1,8,9,15,100);$arr3 = array(1,8,15,200);$res = array();$resHigh = array();//高度相似$resMiddle = array();//中$resLow = array();//低$res = array_merge($arr1,$arr2,$arr3);$res = my_array_unique($res); //排除重复$resHigh = array_intersect($arr1,$arr2,$arr3); //交集$resLow = array_merge(array_diff($arr1,$arr2,$arr3),array_diff($arr2,$arr1,$arr3),array_diff($arr3,$arr1,$arr2));//组合差集$res = array_diff($res,$resHigh); //排除High$resMiddle = array_diff($res,$resLow); //排除Low$res = array_merge($resHigh,$resMiddle,$resLow);function my_array_unique($array){//排除重复 $out = array(); foreach ($array as $key=>$value) { if (!in_array($value, $out)){ $out[$key] = $value; } } return $out;} echo "";print_r($res);exit;/*( [0] => 1 [1] => 8 [2] => 9 [3] => 15 [4] => 2 [5] => 3 [6] => 4 [7] => 5 [8] => 6 [9] => 7 [10] => 10 [11] => 100 [12] => 200)*/