數組重新組合

1,如何將數組arr1轉化成arr2?

arr1 = [

['tracking1','abc@qq.com','80'],['tracking1','abc@qq.com','50'],['tracking2','efg@qq.com','60'],['tracking2','efg@qq.com','30'],

];

arr2 = [

['tracking1','abc@qq.com',['80','50']],['tracking2','efg@qq.com',['60','30']],

];

回複內容：

1,如何將數組arr1轉化成arr2?

arr1 = [

['tracking1','abc@qq.com','80'],['tracking1','abc@qq.com','50'],['tracking2','efg@qq.com','60'],['tracking2','efg@qq.com','30'],

];

arr2 = [

['tracking1','abc@qq.com',['80','50']],['tracking2','efg@qq.com',['60','30']],

];

思路很簡單，就是把數組的第一和第一列的值作為一個唯一key寫入，感覺樓上代碼有點多，簡潔代碼如下

$arr1 = [    ['tracking1','abc@qq.com','80'],    ['tracking1','abc@qq.com','50'],    ['tracking2','efg@qq.com','60'],    ['tracking2','efg@qq.com','30'],];$arr2 = [];foreach ($arr1 as $data) {    list($account,$mail,$val) = $data;    isset($arr2[$account.$mail]) || $arr2[$account.$mail]=[$account,$mail,[]];    array_push($arr2[$account.$mail][2],$val);}$arr2 = array_values($arr2);var_dump($arr2);

我給個思路，先遍曆判斷arr1[0]是否一樣，一樣就往一個新數組中插入，在這基礎判斷[1]是否相同，相同就插入值，不同則合并成一個數組，以此類推

$arr = [['tracking1','abc@qq.com','80'],['tracking1','abc@qq.com','50'],['tracking2','efg@qq.com','60'],['tracking2','efg@qq.com','30']];$finalArr = [[[]]];$mailArr =[];foreach ($arr as $k=>$v){    $mailKey = array_search($v[1],$mailArr);    if($mailKey!==false){        array_push($finalArr[$mailKey][2],$v[2]);    }else{        $finalArr[$k] = $v;        $finalArr[$k][2] = [$v[2]];        $mailArr[$k]=$v[1];    }}$finalArr = array_values($finalArr);var_dump($finalArr);

14行功能代碼，不要太簡單。

說下我的思路，題主這個數組，拆分開其實就是兩個部分，每個數組裡的v0、v1值，和v2值。

$new = array(); $flag = 1;foreach ($arr as $key => $value) {  $newss[$value[0].'-'.$value[1]][] = $value[2];  //取出重複小標0 1的值   $news = array($value[0], $value[1]);  foreach ($new as $k => $v) {    if(!array_diff($v,$news )) { //如果      $flag = 2;      break;    }  }  if($flag == 1) {    $new[] = array($value[0], $value[1]);  }  $flag = 1;}foreach ($new as $key => $value) {  $new[$key][2] = $newss[$value[0].'-'.$value[1]];}var_dump($new);exit;

    $arr1 = [            ['tracking1','abc@qq.com','80'],        ['tracking1','abc@qq.com','50'],        ['tracking2','efg@qq.com','60'],        ['tracking2','efg@qq.com','30'],    ];        $arr2 = [        ['tracking1','abc@qq.com',['80','50']],        ['tracking2','efg@qq.com',['60','30']],    ];    define("CUSTOM_SEPA", "_");    function t($a0){        $r = [];        $res = [];        foreach($a0 as $v){            $r[$v[0].CUSTOM_SEPA.$v[1]][] = $v[2];        }        foreach($r as $k=>$v){            $s = explode(CUSTOM_SEPA, $k);            $s[] = $v;            $res[] = $s;        }        return $res;    }    $res = t($arr1);    print_r($res == $arr2);

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