Question

我有一个包含多个数组的数组，如

$A = array();
$A[0] = array("1","2","3","4","5");
$A[1] = array("1","6","7","8");
$A[2] = array("0","1","3");

我想按频率顺序对多个数组中的值进行排序，并将它们放入另一个数组中，假设为$ B.

$ B中的值为“1”，“1”，“1”，“3”，“3”，“0”，“2”，“4”，“5”，“6”，“ 7" ， “8”。

Answer 1

$A = array();
$A[0] = array("1","2","3","4","5");
$A[1] = array("1","6","7","8");
$A[2] = array("0","1","3");

//Merging above array in to one array
$merged = array_values(call_user_func_array('array_merge', $A));
//Getting occurrence count
$counts = array_count_values($merged);
//Sort by count
arsort($counts);

//Adding to required array
$B = array();
foreach ($counts as $k => $v)
	for($i=1;$i<=$v;$i++)
		$B[] = $k;

echo "<pre>";
print_r($B);
echo "</pre>";

<强>结果

Array
(
    [0] => 1
    [1] => 1
    [2] => 1
    [3] => 3
    [4] => 3
    [5] => 0
    [6] => 8
    [7] => 7
    [8] => 5
    [9] => 2
    [10] => 4
    [11] => 6
)

Answer 2

首先合并所有数组

$ array1 = array（“color”=＆gt;“red”，2,4）;

$ array2 = array（“a”，“b”，“color”=＆gt;“green”，“shape”=＆gt;“trapezoid”，4）;

$ resultado = array_merge（$ array1，$ array2）;

参见 - ＆gt; http://php.net/manual/es/function.array-merge.php

第二次排序大数组

arsort（$ resultado）;

参见 - ＆gt; http://php.net/manual/es/array.sorting.php

Answer 3

使用哈希表计算每个数字的频率，然后按照数组$B中频率的降序存储它们，如下所示：

$hash_table = array();
foreach($A as $array){
    foreach($array as $value){
        if(empty($hash_table[$value])){
            $hash_table[$value] = 1;
        }else{
            $hash_table[$value] += 1;
        }
    }
}
arsort($hash_table);

$B = array();
foreach($hash_table as $key => $value){
    for($i = 0; $i < $value; ++$i){
        $B[] = $key;
    }
}

var_dump($B);  // to see the contents of array $B

Answer 4

如果相同的出现计数项目的顺序不重要，您可以使用：

// Merge all arrays
$counts = array_count_values(call_user_func_array('array_merge', $A));

// Sort by occurance
arsort($counts);

// Add [value] to new array [occurance] times
$B = array();
array_walk($counts, function($occurances, $value) use (&$B){
    for($i=0;$i<$occurances;$i++) $B[] = $value;
});
echo implode(',', $B);

<强>输出

1,1,1,3,3,0,8,7,5,2,4,6

Answer 5

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                new androidTask().execute();
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                Toast.makeText(context, "No Network Connection", Toast.LENGTH_SHORT).show();
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php如何按频率顺序对多个数组中的值进行排序

5 个答案: