大约有 32,000 项符合查询结果（耗时：0.0344秒） [XML]
How to select date from datetime column?
...ng a second call over the same query the difference is even higher: 2984ms vs 7ms (yes, just 7 milliseconds!). I found this while rewriting some old code on a project using Hibernate.
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C# generic type constraint for everything nullable
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answered Mar 14 '15 at 16:27
AidiakapiAidiakapi
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Best way to get application folder path
...pplication, it will be the directory containing the main executable.
In a VSTO 2005 application, it will be the directory containing the VSTO managed assemblies for your application, not, say, the path to the Excel executable.
The others may return different directories depending on your environme...
Get index of array element faster than O(n)
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Is there a good reason not to use a hash? Lookups are O(1) vs. O(n) for the array.
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How do I remove a submodule?
...is no longer a shell script.
It is a call to a C function.
See commit 2e61273, commit 1342476 (14 Jan 2018) by Prathamesh Chavan (pratham-pc).
(Merged by Junio C Hamano -- gitster -- in commit ead8dbe, 13 Feb 2018)
git ${wt_prefix:+-C "$wt_prefix"} submodule--helper deinit \
${GIT_QUIET:+--qui...
When to use Common Table Expression (CTE)
...as much as I want.
– Fandango68
Jan 27 '16 at 5:32
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How can I get dict from sqlite query?
...s ± 1.05 µs per loop (mean ± std. dev. of 7 runs, 100000 loops each)
vs:
conn.row_factory = lambda c, r: dict([(col[0], r[idx]) for idx, col in enumerate(c.description)])
c = conn.cursor()
%timeit c.execute('SELECT * FROM table').fetchall()
19.4 µs ± 75.6 ns per loop (mean ± std. dev. of 7...
What are all the common ways to read a file in Ruby?
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community wiki
5 revs, 4 users 56%fl00r
14
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Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
...; 16
10 => 20
100 => 1391569403904
1,000 => 3268160001953743683783272702066311903448533894049486008426303248121757146615064636953144900245
174442911064952028008546304
50,000 => a very large number!
I agree with @SB that you should always state your assumptions: Mine is that you don't n...
Sorting a list using Lambda/Linq to objects
...j, null );
}
}
You might also want to look at Dynamic LINQ from the VS2008 Samples library. You could use the IEnumerable extension to cast the List as an IQueryable and then use the Dynamic link OrderBy extension.
list = list.AsQueryable().OrderBy( sortBy + " " + sortDirection );
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