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Linq 多字段排序，二次排序 - .NET(C#) - 清泛IT论坛，有思想、有深度
Linq：ordered = source.OrderByDescending( t => t.f1 ).ThenBy( t => t.f2 );
类似SQL：select * from t1 order by f1 desc ,f2 asc
这种写法里 OrderBy、ThenBy 是升序的，OrderByDescending、ThenByDescending 是降序的。
Discuz轻松生成sitemaps.xml网站地图 - 更多技术 - 清泛网 - 专注C/C++及内核技术
....sitemaps.org/schemas/sitemap/0.9/sitemap.xsd\">\n";
$querys = DB::query("SELECT a.tid FROM ".DB::table('forum_thread')." a inner join ".DB::table('forum_forum')." b on a.fid=b.fid ORDER BY a.tid DESC LIMIT 0,10000");
while($threadfid = DB::fetch($querys))
{
$turl=$web_root.'thread-'.$threadfid[...
MVC Vs n-tier architecture
...esn't make sense to use the Controller for updates and inserts but not for selects and filters, and I don't see the point of separation of concerns only to bind the view to the model anyway! Conclusion - MVC is another one of those obfuscations created by .... have a guess. I don't recall 3-tier eve...
UITableViewHeaderFooterView: Unable to change background color
...I tried this:
within the xib file the background color for header view was selected to clear color instead of default once I changed it to default the warning went away.
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Print all but the first three columns
...ents. We have asked the OP to choose a more correct answer, and he/she has selected mine. After some other contributors have edited my answer to reference there answer (see the history). Is it clear for you? What do you advice me to improve the understandability of my answer? Cheers ;-)
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Firefox session cookies
...havior quite questionable, thanks for your research. If "Save and Quit" is selected or "Restore tabs and windows", upon closing the browser, all session cookies remain intact. The only way for the "user" to get rid of them is to first close the tab(s) and then close the browser.
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How is the default max Java heap size determined?
...1.4.2.
In the J2SE platform version 1.4.2 by
default the following selections were
made
initial heap size of 4 Mbyte
maximum heap size of 64 Mbyte
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How to prevent page scrolling when scrolling a DIV element?
...rollTop property). An alternative and IMO better approach would be to only selectively disable the browser's scrolling in order to prevent the page scroll, but not the DIV scroll. Check out Rudie's answer below which demonstrates this solution.
Here you go:
$( '.scrollable' ).on( 'mousewheel DO...
The application was unable to start correctly (0xc000007b)
...(x64).
5) On ComputerB, I googled for Visual C++ 2012 Redistributable and selected and installed the x64 version.
6) On ComputerB, I ran the .exe on ComputerB and did not receive the error message.
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Python argparse: Make at least one argument required
...tiple aspects of command line based program:
good design of command line
selecting/using proper parser
argparse offers a lot, but restricts possible scenarios and can become very complex.
With docopt things go much shorter while preserving readability and offering high degree of flexibility. If...