大约有 7,400 项符合查询结果（耗时：0.0247秒） [XML]
In Firebase, is there a way to get the number of children of a node without loading all the node dat
... });
Refer :https://firebase.google.com/docs/functions/database-events
root--|
|-users ( this node contains all users list)
|
|-count
|-userscount :
(this node added dynamically by cloud function with the user count)
...
Cocoa: What's the difference between the frame and the bounds?
...skills since I've been working on Android for the last year. I believe the root view of a View Controller fills the screen, so its frame and bounds should be the same.
– Suragch
Nov 17 '17 at 2:58
...
Is recursion ever faster than looping?
...S, the hierarchical file system in your computer is a RDS, i.e: you have a root directory, containing files and directories, every directory containing files and directories, every one of those directories containing files and directories...
...
Git commits are duplicated in the same branch after doing a rebase
... of C5' is different from C5, and this information is also included in the root node of a commit tree affecting the hash result.
– Ozgur Murat
May 26 '17 at 20:00
...
Various ways to remove local Git changes
... a pathspec referring to the current working directory, which might be the root of the repo. From git-scm.com: git checkout [<tree-ish>] [--] <pathspec>… updates the named paths in the working tree from the index file or from a named <tree-ish>.
– Jerry101
...
Creating a singleton in Python
...r the task.
Here is a quote from http://googletesting.blogspot.com/2008/08/root-cause-of-singletons.html:
Now, there is one kind of Singleton which is OK. That is a singleton where all of the reachable objects are immutable. If all objects are immutable than Singleton has no global state, as everyt...
How do you do a deep copy of an object in .NET? [duplicate]
...ore difficult.
public Person DeepCopy()
{
// Clone the root ...
Person other = (Person) this.MemberwiseClone();
// ... then clone the nested class.
other.Purchase = this.Purchase.ShallowCopy();
return other;
}
}
// Added to demo how to copy...
How is Docker different from a virtual machine?
... low level?
In this case the VM manager takes over the CPU ring 0 (or the "root mode" in newer CPUs) and intercepts all privileged calls made by the guest OS to create the illusion that the guest OS has its own hardware. Fun fact: Before 1998 it was thought to be impossible to achieve this on the x8...
Android Left to Right slide animation
...
If you want the transition work for whole application you can create a rootacivity and inherit it in the activity you need. In Root Activity's onCreate call overridePendingTransition with desired direction. And onStart call overridePendingTransition with other direction if activity is resumed. H...
Passing Data between View Controllers
...dictionaries, with each dictionary representing one row in your table. The root view for your app displays that table, and it might be responsible for loading the array from a file. When the user decides to add a new row to the table, they tap some button and your controller creates a new (mutable) ...