我正在为csv创建搜索功能。根据我的搜索结果,我想删除重复项,然后将那些具有重复项的项移到数组的开头。
Array
(
[0] => Array
(
[0] => COD 21
[1] => 4567
[2] => Robert Wahl
)
[1] => Array
(
[0] => RT 5
[1] => 1234
[2] => Robert Merrill
)
[2] => Array
(
[0] => XD 62
[1] => 1653
[2] => Robert Hill
)
[3] => Array
(
[0] => RT 5
[1] => 1234
[2] => Robert Merrill
)
)
我有一个删除重复项的函数,但是我不知道如何让它将具有重复项的值移动到数组的开头,并根据具有最多重复项的值对它们进行排序:
function arrayUnique($array) {
$aux_ini=array();
$result=array();
for($n=0;$n<count($array);$n++)
{
$aux_ini[]=serialize($array[$n]);
}
$mat=array_unique($aux_ini);
for($n=0;$n<count($array);$n++)
{
$result[]=unserialize($mat[$n]);
}
return $result;
}
感谢任何和所有帮助。
答案 0 :(得分:3)
function arrayUnique($array) {
// count values
$arr = array_count_values (array_map('serialize',$array));
// sort in desc order
arsort($arr);
// take keys and restore array
return array_map('unserialize',array_keys($arr));
}
答案 1 :(得分:2)
function array_unique_ordered_by_duplicates($array)
{
//serialize inner arrays
$serialized = array_map('serialize', $array);
//create an array indexed by the serialized values, with all keys having a value of 0
$flipped = array_map(function($el){
return 0;
},array_flip($serialized));
//increment the count each time an element is encountered, thereby gicing duplicates a higher value
foreach($serialized as $v){
$flipped[$v]+=1;
}
//sort descending on the calculated value, putting the most duplicated items first
arsort($flipped);
//return unserialized, deduped, orded array
return array_map('unserialize',array_keys($flipped));
}
请注意,使用php array_count_values
,splash58是上述版本的更高效版本,应该使用
答案 2 :(得分:1)
有点时髦,但我认为代码相对容易理解。
$csv = array(array('COD 21','4567','Robert Wahl')
,array('RT 5','1234','Robert Merrill')
,array('XD 62','1653','Robert Hill')
,array('RT 5','1234','Robert Merrill')
);
echo "Begin...<br>\n";
$serials = array();
$dupeqty = array();
foreach ($csv as $csvkey => $csvdata)
{
$dupekey = serialize($csvdata);
if ( !isset($serials[$dupekey]) )
$serials[$dupekey] = $csvkey;
if ( !isset($dupeqty[$dupekey]) )
$dupeqty[$dupekey] = 0;
$dupeqty[$dupekey]++;
}
arsort($dupeqty);
foreach ($dupeqty as $dupekey => $times)
echo $dupekey . " occurs $times times<br>\n";
flush();
echo "<br>\n";
echo "Accessing the original array...<br>\n";
foreach ($dupeqty as $dupekey => $times)
{
$data = $csv[$serials[$dupekey]];
echo '... data ' . $data[0] . ' ' . $data[1] . ' ' . $data[2] . "<br>\n";
}
运行它会生成:
Begin...
a:3:{i:0;s:4:"RT 5";i:1;s:4:"1234";i:2;s:14:"Robert Merrill";} occurs 2 times
a:3:{i:0;s:5:"XD 62";i:1;s:4:"1653";i:2;s:11:"Robert Hill";} occurs 1 times
a:3:{i:0;s:6:"COD 21";i:1;s:4:"4567";i:2;s:11:"Robert Wahl";} occurs 1 times
Accessing the original array...
... data RT 5 1234 Robert Merrill
... data XD 62 1653 Robert Hill
... data COD 21 4567 Robert Wahl
答案 3 :(得分:0)
试试这个,
function array_multidimensional($array)
{
$serialized = array_map('serialize', $array);
$array = array_unique($serialized);
return array_intersect_key($array, $unique);
}