大约有 47,000 项符合查询结果（耗时：0.0702秒） [XML]
Error: request entity too large
...imit); in node_modules/express/node_modules/connect/lib/middleware/json.js:46 and restarting node, I get this output in the console:
Limit file size: 1048576
connect.multipart() will be removed in connect 3.0
visit https://github.com/senchalabs/connect/wiki/Connect-3.0 for alternatives
connect.lim...
NOT IN vs NOT EXISTS
...ley. In the example there the number of logical reads increase from around 400 to 500,000.
Additionally the fact that a single NULL can reduce the row count to zero makes cardinality estimation very difficult. If SQL Server assumes that this will happen but in fact there were no NULL rows in the da...
How to find all combinations of coins when given some dollar value
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54
I looked into this once a long time ago, and you can read my little write-up on it. Here’s the...
Background ListView becomes black when scrolling
...
Piyush
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answered May 14 '10 at 9:32
PraveenPraveen
...
How do you round a floating point number in Perl?
...sprintf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other mathematical and trigonometric
functions.
use POSIX;
$ceil = ceil(3.5);...
Debugging App When Launched by Push Notification
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147
In XCode < 4.0 (for XCode >= 4, see answer by delirus below), you can now configure Xcode...
Java HTTPS client certificate authentication
...brggmntmbrggmn
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6
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Find all records which have a count of an association greater than zero
...s an example
[10] pry(main)> Comment.distinct.pluck :article_id
=> [43, 34, 45, 55, 17, 19, 1, 3, 4, 18, 44, 5, 13, 22, 16, 6, 53]
[11] pry(main)> _.size
=> 17
[12] pry(main)> Article.joins(:comments).size
=> 45
[13] pry(main)> Article.joins(:comments).distinct.size
=> 17
[1...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...查类型安全，向下转换时失败(为NULL)，static_cast不会。
4) reinterpret_cast：任意转换，指针与其他类型间不安全的相互转换，仅在对所做一切了然于心时使用。
以下内容来自CSDN博客：http://blog.csdn.net/zjl_1026_2001/archive/2008/04/03/...