大约有 16,000 项符合查询结果（耗时：0.0392秒） [XML]
Do we still need end slashes in HTML5?
...nd-slashes just fine, so there's no harm in leaving it there. Means easier converting backwards to XHTML, if necessary for whatever reason.
– Nightfirecat
Sep 9 '11 at 19:19
4
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For each row return the column name of the largest value
...
apply converts the data.frame to matrix internally. You may not see a performance difference on these dimensions though.
– Arun
Jul 19 '13 at 0:07
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Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
...s or boxes around strings. See es5.github.io/#x15.5.2.1 . About how things convert to objects see es5.github.io/#x9.9
– Benjamin Gruenbaum
Feb 21 '14 at 13:43
5
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Heroku Postgres - terminate hung query (idle in transaction)
...issions you can also do it from the shell. To "cancel" one can do:
kill -INT 1234
and to "terminate", simply:
kill 1234
DO NOT:
kill -9 1234
... that will often result in the the whole postgres server going down in flames, then you may as well restart postgres. Postgres is pretty robust, ...
C# 通过代码安装、卸载、启动、停止服务 - .NET(C#) - 清泛IT论坛，有思想、有深度
... for (int i = 0; i < 60; i++)
{
se...
How do I record audio on iPhone with AVAudioRecorder?
...ableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
[recor...
What does extern inline do?
...egarding how it worked. GCC was among the first to implement inlining, and introduced the inline, static inline, and extern inline constructs; most pre-C99 compiler generally follow its lead.
GNU89:
inline: the function may be inlined (it's just a hint though). An out-of-line version is always e...
General guidelines to avoid memory leaks in C++ [closed]
...
Instead of managing memory manually, try to use smart pointers where applicable.
Take a look at the Boost lib, TR1, and smart pointers.
Also smart pointers are now a part of C++ standard called C++11.
shar...
Fastest way to remove first char in a String
... result to a variable, possibly data itself.)
I wouldn't take performance into consideration here unless it was actually becoming a problem for you - in which case the only way you'd know would be to have test cases, and then it's easy to just run those test cases for each option and compare the re...
How does JavaFX compare to WPF? [closed]
...ing the code, FXML or created using the scene builder (which is ultimately converted to FXML).
Controls
JavaFX provides an ever growing library of controls that we have come to expect. One major difference between JavaFX and WPF is that the controls are essentially black boxes and cannot be re-tem...