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搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
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#日志显示从节点 从主节点同步复制数据
[replslave] repl: from host:192.168.0.1:27017
5、测试主从复制。
在主节点上连接到终端：
mongo 127.0.0.1
#建立test 数据库。
use test;
往testdb表插入数据。
> db.testdb.insert({"test1":"testval1"})
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Working with Enums in android
... The syntax in the question is the kind one might come up with from using a decompiler.
– Dan Getz
Jun 8 '16 at 20:26
10
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What exactly does the post method do?
...ueue.
So startAnimation will be fired in a new thread when it is fetched from the messageQueue
[EDIT 1]
Why do we use a new thread instead of UI thread (main thread)?
UI Thread :
When application is started, Ui Thread is created automatically
it is in charge of dispatching the events to the...
How can you escape the @ character in javadoc?
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Just write it as an HTML entity:
@
From the document "javadoc - The Java API Documentation Generator"
If you want to start a line with the @ character and not have it be interpreted, use the HTML entity @.
This implies that you can use HTML entities for any ...
What is the standard exception to throw in Java for not supported/implemented operations?
... @JarrodRoberson OK, that statement should really be removed from the class documentation in that case. The exception does seem to be used by other packages. I guess if Oracle does so, then so should we. I'll file a bug report.
– Maarten Bodewes
J...
RabbitMQ message size and types
...ith two preconditions:
The thing you are sending can be converted to and from a bytestring
The consumer knows exactly what it is getting and how to convert it to the original object
Strings are pretty easy, they have a built in method for converting to and from bytes. If you know it is a strin...
Do you have to put Task.Run in a method to make it async?
...can use TaskCompletionSource<T> or one of its shortcuts (TaskFactory.FromAsync, Task.FromResult, etc). I don't recommend wrapping an entire method in Task.Run; synchronous methods should have synchronous signatures, and it should be left up to the consumer whether it should be wrapped in a Tas...
How do I browse an old revision of a Subversion repository through the web view?
...r>/
E.g.
http://www.example.com/svnrepository/!svn/bc/3/
Alternative
From Bert Huijben's comment:
If your repository is hosted using Subversion 1.6.0 or later, you can
use example.com/svnrepository/?p=3 for the same result... This method
/is/ documented. (?r= revision of the file, ?p= operati...
How to increase maximum execution time in php [duplicate]
...Place this at the top of your PHP script and let your script loose!
Taken from Increase PHP Script Execution Time Limit Using ini_set()
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Active Record - Find records which were created_at before today
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thanks!. If I need all records from MyTable1 which is one to one relation with MyTable on the same condition, how to write the query? I was referring something like MyTable1.where(MyTable[:created_at] < Time.now) is it possible?
– ...