Question

基本上标题就是问题本身。我有一个集合，它在一个字段中存储数组。我做了一个排序算法来整理那些数组，结果是排序数组：

array:8 [▼
  3 => array:5 [▼
    5 => 100
    1 => 50
    2 => 30
    3 => 20
    4 => 10
  ]
  6 => array:5 [▼
    1 => 100
    5 => 50
    3 => 30
    4 => 20
    2 => 10
  ]
  2 => array:5 [▼
    3 => 100
    5 => 50
    4 => 30
    1 => 20
    2 => 10
  ]

此数组3,6,2的索引是集合的ID。如何根据此ID以与数组相同的顺序订购集合？

Answer 1

假设您在private CompositeDisposable mSubscriptions; @Override public void onCreate(Bundle savedInstanceState) { ... mSubscriptions = new CompositeDisposable(); ... } @Override protected void onPause() { super.onPause(); mSubscriptions.clear(); } public void someMethodForButtonClick(View view) { IwcRepository iwcRepository = Injection.provideIwcRepository(getApplication()); mSubscriptions.add(iwcRepository.getSomeCompletable() .subscribeOn(Schedulers.computation()) .observeOn(AndroidSchedulers.mainThread()) .subscribeWith(new DisposableCompletableObserver() { @Override public void onComplete() { } @Override public void onError(@NonNull Throwable e) { } })); }变量中有数组：

$a

然后您可以参考来自$a = array:8 [▼ 3 => array:5 [▼ 5 => 100 1 => 50 2 => 30 3 => 20 4 => 10 ] 6 => array:5 [▼ 1 => 100 5 => 50 3 => 30 4 => 20 2 => 10 ] 2 => array:5 [▼ 3 => 100 5 => 50 4 => 30 1 => 20 2 => 10 ] ];的密钥按升序排序，并具有以下内容：

ksort()

类似地，对于降序，您可以使用foreach($a as $b) { ksort($b); }。

希望这有帮助。

Laravel如何根据数组索引对Collection进行排序

1 个答案: