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LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria
...could translate to SQL in different ways. I just tried LINQPad with the IQ MySql provider, and FirstOrDefault() adds LIMIT 0,1 while SingleOrDefault() adds nothing.
– Lucas
Jan 15 '15 at 16:04
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Java: Subpackage visibility?
...o this in IntelliJ, my source tree looks like this:
src // source root
- odp
- proj // .java source here
- test // test root
- odp
- proj // JUnit or TestNG source here
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How to split a dos path into its components in Python
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This doesn't seem to work for path = root. In that case, the result of path.split is ['','']. In fact in general, this split() solution gives a leftmost directory with empty-string name (which could be replaced by the appropriate slash). The core problem is th...
Flat file databases [closed]
...te. It works as a database, uses SQL, and is pretty easy to change over to MySQL (especially if you're using abstracted classes for database manipulation like I do!)
In fact, especially with the "accepted answer"'s method, it can drastically cut the memory usage of your app (you don't have to load a...
How to install a specific version of a ruby gem?
...sudo to work with RVM gems. When you do
sudo you are running commands as root, another user in another shell
and hence all of the setup that RVM has done for you is ignored while
the command runs under sudo (such things as GEM_HOME, etc...). So to
reiterate, as soon as you 'sudo' you are run...
Add only non-whitespace changes
... if you have a handy alias to execute a bash command in the working tree's root. The incorrect formulation is:
sh = !bash -c '"$@"' -
While the correct one is:
sh = !bash -c '\"$@\"' -
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VC MFC工具栏(CToolBar)控件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...真彩位图，上面的方法显示是无法实现的，那这个功能是如何实现呢？
SetImageList函数可以做到，既然要显示真彩位图，那就不能使用上面的工具栏资源（256色），所以一切都得到用代码实现
首先向工程引入六张位图（用于工...
Getting the location from an IP address [duplicate]
...g JavaScript for client-side scripting, PHP for server-side scripting, and MySQL for the database.
23 Answers
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Convert one date format into another in PHP
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To convert $date from dd-mm-yyyy hh:mm:ss to a proper MySQL datetime
I go like this:
$date = DateTime::createFromFormat('d-m-Y H:i:s',$date)->format('Y-m-d H:i:s');
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How do you manage databases in development, test, and production?
...s readable also at http://martinfowler.com/articles/evodb.html
In one PHP+MySQL project I've had the database revision number stored in the database, and when the program connects to the database, it will first check the revision. If the program requires a different revision, it will open a page fo...