改变laravel集合

问题描述：

I need a certain array format like this:

    $data = [
        1 => ['order' => 3],
        2 => ['order' => 2],
        3 => ['order' => 1]
    ];

So when I do:

    $ids = $items->transform(function ($item) {
        return [$item->id => ['order' => rand(1,10)]];
    })->all();

Gives:

array:3 [
  0 => array:1 [
    1 => array:1 [
      "order" => 8
    ]
  ]
  1 => array:1 [
    2 => array:1 [
      "order" => 3
    ]
  ]
  2 => array:1 [
    3 => array:1 [
      "order" => 10
    ]
  ]
]

How can I transform the array in a specific way I need above? TIA

我需要这样的数组格式： p>

  $  data = [
 1 =＆gt;  ['order'=＆gt;  3]，
 2 =＆gt;  ['order'=＆gt;  2]，
 3 =＆gt;  ['order'=＆gt;  1] 
]; 
  code>  pre> 
 
 所以当我这样做时： p> 
 
 
  $ ids = $ items-＆gt;  transform（function（$ item）{
 return [$ item-＆gt; id =＆gt; ['order'=＆gt; rand（1,10）]]; 
}） - ＆gt; all（）; 
   code>  pre> 
 
 给出： p> 
 
 
  array：3 [
 0 =＆gt; 数组：1 [
 1 =＆gt; 数组：1 [
“order”=＆gt;  8 
] 
] 
 1 =＆gt; 数组：1 [
 2 =＆gt; 数组：1 [
“order”=＆gt;  3 
] 
] 
 2 =＆gt; 数组：1 [
 3 =＆gt; 数组：1 [
“order”=＆gt;  10 
] 
] 
] 
  code>  pre> 
 
 如何以上面我需要的特定方式转换数组？  TIA  p> 
  div>

答

you can use mapWithKeys, docs is here: https://laravel.com/docs/5.5/collections#method-mapwithkeys

$keyed = $items->mapWithKeys(function ($item) {
    return [$item->id => ['order' => rand(1,10)]];
});

$ids = $keyed->all();

改变laravel集合

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