大约有 48,000 项符合查询结果（耗时：0.0532秒） [XML]
When and why are database joins expensive?
...s back to mitigating the size of the working set. Joins involving properly selected keys with correctly set up indexes are cheap, not expensive, because they allow significant pruning of the result before the rows are materialised.
Materialising the result involves bulk disk reads which are the mo...
How do I rename a repository on GitHub?
...blem, because you only have to do #2.
Let's say your username is someuser and your project is called someproject.
Then your project's URL will be1
git@github.com:someuser/someproject.git
If you rename your project, it will change the someproject part of the URL, e.g.
git@github.com:someuser/ne...
How to compile a 64-bit application using Visual C++ 2010 Express?
... dialog box there will be a "Configuration" drop-down menu. Make sure that selects "All Configurations." There will also be a "Platform" drop-down that will read "Win32." Finally on the right there is a "Configuration Manager" button - press it. In the dialog that comes up, find your project, hit th...
What's the difference between IQueryable and IEnumerable
...to execute the entire query against the underlying data source (like using SELECT TOP 1 in SQL).
See:
The .NET Standard Query Operators
share
|
improve this answer
|
foll...
How can I run PowerShell with the .NET 4 runtime?
...rShell (the engine) runs fine under .NET 4.0. PowerShell (the console host and the ISE) do not, simply because they were compiled against older versions of .NET. There's a registry setting that will change the .NET framework loaded systemwide, which will in turn allow PowerShell to use .NET 4.0 cla...
How to customize the background/border colors of a grouped table view cell?
I would like to customize both the background and the border color of a grouped-style UITableView.
11 Answers
...
CSS @font-face - what does “src: local('☺')” mean?
I'm using @font-face for the first time and downloaded a font-kit from fontsquirrel
3 Answers
...
Explanation of JSHint's Bad line breaking before '+' error
... But when the expression is within some parenthesis the warning persists. And, that makes me sad.
– Ben Hyde
Mar 25 '14 at 15:35
23
...
Visual Studio, debug one of multiple threads
...ow (Debug -> Windows -> Threads) right-click the thread you want and select "switch to thread".
You can also choose "freeze" on the threads you don't want to debug in order to keep them from running. Don't forget to "thaw" them if you expect them to do work, however.
Further reading.
...
Remote connect to clearDB heroku database
...
In heroku website, go to My Apps and select the app on which you have installed ClearDB.
On the top corner click on Addons and then select ClearDB MySQL Database.
Once there, click on your database and choose the 'Endpoint Information' tab. There you see your ...