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How to know what the 'errno' means?
When calling execl(...) , I get an errno=2 . What does it mean? How can I know the meaning of this errno ?
15 Answers
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Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...ill somewhat faster than sqrtss.
edit: If speed is critical, and you're really calling this in a loop for many values, you should be using the vectorized versions of these instructions, rsqrtps or sqrtps, both of which process four floats per instruction.
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Get the (last part of) current directory name in C#
...the last part of current directory, for example from /Users/smcho/filegen_from_directory/AIRPassthrough , I need to get AIRPassthrough .
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Argparse: Way to include default values in '--help'?
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@mqsoh multiple inheritance actually just worked, but unfortunately is not public API: stackoverflow.com/a/52025430/895245
– Ciro Santilli 郝海东冠状病六四事件法轮功
Aug 26 '18 at 10:41
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What are best practices that you use when writing Objective-C and Cocoa? [closed]
...rogramming practices do you use when writing Objective-C, and more specifically when using Cocoa (or CocoaTouch).
33 Answer...
'typeid' versus 'typeof' in C++
...perator which returns type identification information at run time. It basically returns a type_info object, which is equality-comparable with other type_info objects.
Note, that the only defined property of the returned type_info object has is its being equality- and non-equality-comparable, i.e. t...
How do I create a Java string from the contents of a file?
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Read all text from a file
Java 11 added the readString() method to read small files as a String, preserving line terminators:
String content = Files.readString(path, StandardCharsets.US_ASCII);
For versions between Java 7 and 11,...
Image comparison - fast algorithm
...ow.
The second method uses only elementary image processing, and is potentially faster than the first approach, and is straightforward to implement. However, what it gains in understandability, it lacks in robustness -- matching fails on scaled, rotated, or discolored images.
The third method is bo...
How to find third or nth maximum salary from salary table?
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Use ROW_NUMBER(if you want a single) or DENSE_RANK(for all related rows):
WITH CTE AS
(
SELECT EmpID, EmpName, EmpSalary,
RN = ROW_NUMBER() OVER (ORDER BY EmpSalary DESC)
FROM dbo.Salary
)
SELECT EmpID, EmpName, EmpSalary
FROM CTE
WHERE RN = @NthRow
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How could I ignore bin and obj folders from git repository?
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it does not work when you first commit all files and then add .gitignore file to your repo and commit it. Newly ignored files are still will be shown as modified (if you rebuild, for example).
– vlad2135
Jun 23 '19 at 15:30
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