大约有 8,000 项符合查询结果（耗时：0.0192秒） [XML]
What is a regular expression which will match a valid domain name without a subdomain?
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86
I know that this is a bit of an old post, but all of the regular expressions here are missing o...
How expensive is the lock statement?
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Some context: dividing two numbers on a 3Ghz x86 takes about 10ns (not including the time it takes to fetch/decode the instruction); and loading a single variable from (non-cached) memory into a register takes about 40ns. So 50ns is insanely, blindingly fast - you shoul...
Where is shared_ptr?
... James McNellisJames McNellis
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3
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In C/C++ what's the simplest way to reverse the order of bits in a byte?
...a,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x8...
Worst security hole you've seen? [closed]
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86
OMFG ... next time I have a bad day, I go drop some tables
– Michael Niemand
Oct 15 '09 at 16:17
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Plurality in user messages
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slebetmanslebetman
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Are GUID collisions possible?
...e any decent GUID implementation will not
– Guillaume86
Jun 4 '12 at 15:18
1
@MatthewLock The bir...
What is the difference between atomic and critical in OpenMP?
... I disagree with all numbers you mention in your explanation. Assuming x86_64, the atomic operation will have a few cycle overhead (synchronizing a cache line) on the cost of roughly a cycle. If you would have a ''true sharing'' cost otherwise, the overhead is nihil. A critical section incurs the...
How to assign colors to categorical variables in ggplot2 that have stable mapping?
...is the output from sessionInfo():
R version 3.0.2 (2013-09-25)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
[7] LC_PAP...
How to reference generic classes and methods in xml documentation
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MrLoreMrLore
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