大约有 41,000 项符合查询结果（耗时：0.0455秒） [XML]
ToList()— does it create a new list?
...ublic static void RunChangeList()
{
var objs = Enumerable.Range(0, 10).Select(_ => new MyObject() { SimpleInt = 0 });
var whatInt = ChangeToList(objs); // whatInt gets 0
}
public static int ChangeToList(IEnumerable<MyObject> objects)
{
var objectList = objects.ToList();
o...
How to empty a Heroku database
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If you already have multiple gems installed, you may be presented with:
Select gem to uninstall:
1. heroku-2.25.0
2. heroku-2.26.2
3. All versions
Just uninstall #2 and rerun the command. Joy!
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Memcached vs. Redis? [closed]
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Use Redis if
You require selectively deleting/expiring items in the cache. (You need this)
You require the ability to query keys of a particular type. eq. 'blog1:posts:*', 'blog2:categories:xyz:posts:*'. oh yeah! this is very important. Use this to i...
Get index of array element faster than O(n)
...gt; [6] }
This allows for a quick search for duplicate entries:
indices.select { |k, v| v.size > 1 }
=> { 1 => [0, 3], 2 => [1, 4], 3 => [2, 5] }
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How to read and write into file using JavaScript?
...t the file into the browser, or a simple upload control. Once the user has selected a file, you can read it w/ Javascript: http://www.html5rocks.com/en/tutorials/file/dndfiles/
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How to query MongoDB with “like”?
...d all entries for name? or the wildcard for * in SQL? Something that does select name from users; which just lists all the users?
– anon58192932
Oct 18 '17 at 19:15
1
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Android notification doesn't disappear after clicking the notifcation
...tTitle, contentText, pendingIntent);
// Cancel the notification after its selected
notification.flags |= Notification.FLAG_AUTO_CANCEL;
and to launch the app:
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent = ...
How to access class constants in Twig?
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@DamianPolac do you know PHPStorm will prompt variable selection in twig file?
– Codium
Jun 21 at 8:38
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How to cherry-pick from a remote branch?
... Because now you are merging the HEAD of master into zebra instead of just selected commits.
– Chef Pharaoh
Apr 28 '17 at 15:29
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Cannot hide status bar in iOS7
...ly problem with this approach is if you use the UIImagePickerController to select images it will force the status bar to appear once more.The only sure fire way to prevent this is to implement the prefersStatusBarHidden method in each of your view controllers and reset the UIViewControllerBasedStatu...