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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...照一些属性来判断谁应该胜出。这个属性可以是一个静态ID，也可以是更新的度量像最近一次事务ID（最新的节点会胜出）。详情请参考NoSQL数据库分布式算法的协调者竞选还有维基百科的解释 。
选举 那mongodb是怎进行选举的呢...
When exactly are onSaveInstanceState() and onRestoreInstanceState() called?
... (from the official doc ) describes the well-known lifecycle of an Android activity:
5 Answers
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How to force an entire layout View refresh?
...
To strictly answer the question: Use invalidate():
public void invalidate ()
Since: API Level 1
Invalidate the whole view. If the view is visible, onDraw(Canvas) will be called at some point in the future. This must be called from a UI thread. To call from...
What JSON library to use in Scala? [closed]
...m.codahale.jerkson.Json._
scala> val l = List(
Map( "id" -> 1, "name" -> "John" ),
Map( "id" -> 2, "name" -> "Dani")
)
scala> generate( l )
res1: String = [{"id":1,"name":"John"},{"id":2,"name":"Dani"}]
...
Display Animated GIF
...lay animated GIF images in my aplication.
As I found out the hard way Android doesn't support animated GIF natively.
30 Ans...
How do you save/store objects in SharedPreferences on Android?
...n is better. First of all to use serialize, the object and every object inside it needs to implement the serialize interface. This is not needed for gson. gson also works great when your object is a list of objects.
– Neville Nazerane
Jan 19 '17 at 7:26
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Implicit “Submit” after hitting Done on the keyboard at the last EditText
...
Try this:
In your layout put/edit this:
<EditText
android:id="@+id/search_edit"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="text"
android:singleLine="true"
android:imeOptions="actionDone" />
In your activity...
Pull all commits from a branch, push specified commits to another
...re looking for is a 'cherry pick'. That is, take a single commit from the middle of one branch and add it to another:
A-----B------C
\
\
D
becomes
A-----B------C
\
\
D-----C'
This, of course, can be done with the git cherry-pick command.
The problem with this commit is that git co...
How to use FormData for AJAX file upload?
...тлов This is depends of what type of controller you use. Is it server side or front side controller? You trying to solve CSRF protection here?
– Spell
Aug 8 '16 at 10:43
1
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Reset AutoIncrement in SQL Server after Delete
I've deleted some records from a table in a SQL Server database. Now the ID's go from 101 to 1200. I want to delete the records again, but I want the ID's to go back to 102. Is there a way to do this in SQL Server?
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