大约有 43,000 项符合查询结果（耗时：0.0653秒） [XML]
Do I need to heartbeat to keep a TCP connection open?
...s that that communicate via TCP/IP. Component A acts as a server/listener and Component B is the client. The two should communicate as quickly as possible. There can only ever be one connection at any time (though that is aside to this question). A senior developer at my company has said I need ...
What is a database transaction?
... To do that you have first to withdraw the amount from the source account, and then deposit it to the destination account. The operation has to succeed in full. If you stop halfway, the money will be lost, and that is Very Bad.
In modern databases transactions also do some other things - like ensur...
How to get the request parameters in Symfony 2?
I am very new to symfony. In other languages like java and others I can use request.getParameter('parmeter name') to get the value.
...
How can I get the current PowerShell executing file?
...for PowerShell 5:
If you're only using PowerShell 3 or higher, use $PSCommandPath
If want compatibility with older versions, insert the shim:
if ($PSCommandPath -eq $null) { function GetPSCommandPath() { return $MyInvocation.PSCommandPath; } $PSCommandPath = GetPSCommandPath; }
This adds $PSComman...
WaitAll vs WhenAll
What is the difference between Task.WaitAll() and Task.WhenAll() from the Async CTP ?
Can you provide some sample code to illustrate the different use cases ?
...
Checking out Git tag leads to “detached HEAD state”
I'm developing a deployment script for my git project and I just started using tags. I've added a new tag called v2.0 :
2 ...
Qt: can't find -lGL error
... edited Jul 30 '18 at 14:05
Rando Hinn
1,1151717 silver badges3232 bronze badges
answered Aug 29 '13 at 6:15
...
Dynamically Changing log4j log level
...ife cyle of the Logger. On reinitialization the configuration will be read and used as setting the level at runtime does not persist the level change.
UPDATE: If you are using Log4j 2 you should remove the calls to setLevel per the documentation as this can be achieved via implementation classes.
...
How long should SQL email fields be? [duplicate]
...dress field is going to be arbitrary. However, I was wondering what the "standard" is? How long do you guys make it? (same question for Name field...)
...
Liquibase lock - reasons?
...
There is a built-in command in Liquibase called releaseLocks that would execute what @Adrian Ber answered but I think it is database agnostic.
– user1434769
Oct 26 '15 at 11:17
...