大约有 40,000 项符合查询结果（耗时：0.0603秒） [XML]
Why should C++ programmers minimize use of 'new'?
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There are two widely-used memory allocation techniques: automatic allocation and dynamic alloc...
How to extract the substring between two markers?
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edited Oct 8 '13 at 15:50
CDMP
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answered Jan 12 '11 at 9:18
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How to open an elevated cmd using command line for Windows?
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edited Jan 25 '17 at 19:02
Felix Dombek
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an...
Omitting the second expression when using the if-else shorthand
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edited Jul 26 '18 at 16:03
answered Jun 17 '12 at 6:33
aj...
Why should a Java class implement comparable?
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10 Answers
10
Active
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Get selected element's outer HTML
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2014 Edit : The question and this reply are from 2010. At the time, no better solution was widely available. Now, many of the other replies are better : Eric Hu's, or Re Capcha's for example.
This site seems to have a solutio...
How to convert C# nullable int to int
...if(v1==null)
v2 = default(int);
else
v2 = v1;
Also, as of .NET 4.0, Nullable<T> has a "GetValueOrDefault()" method, which is a null-safe getter that basically performs the null-coalescing shown above, so this works too:
v2 = v1.GetValueOrDefault();
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What's the difference between ASCII and Unicode?
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ASCII defines 128 characters, which map to the numbers 0–127. Unicode defines (less than) 221 characters, which, similarly, map to numbers 0–221 (though not all numbers are currently assigned, and some are reserved).
Unicode is a superset of ASCII, and the numbers 0–127 ha...
How to change the height of a ?
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Css:
br {
display: block;
margin: 10px 0;
}
The solution is probably not cross-browser compatible, but it's something at least. Also consider setting line-height:
line-height:22px;
For Google Chrome, consider setting content:
content: " ";
Other than t...
How do I check what version of Python is running my script?
...int(sys.version) # parentheses necessary in python 3.
2.5.2 (r252:60911, Jul 31 2008, 17:28:52)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)]
For further processing:
>>> sys.version_info
(2, 5, 2, 'final', 0)
# or
>>> sys.hexversion
34014192
To ensure a script runs with a minim...