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原子vector的一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术
...原版链接
源码依赖Facebook的folly库，稍加适配改成了独立运行的版本，代码比较简单，实现分配好空间，然后对元素进行原子交换，扩容采用链表的形式，代码可直接运行。
测试代码：
HPHP::AtomicVector<float> v_atom(2, 0.f);
void a...
How to elegantly rename all keys in a hash in Ruby? [duplicate]
...ormance considerations:
Based on the Tin Man's answer, my answer is about 20% faster than Jörg W Mittag's answer for a Hash with only two keys. It may get even higher performance for Hashes with many keys, specially if there are just a few keys to be renamed.
...
What is a deadlock?
...ving a long process. Thread B waiting to lock resource A. CPU time usage : 20%, can you consider that a deadlock situation?
– rickyProgrammer
Sep 28 '17 at 16:37
2
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Fastest way to check if string contains only digits
...
Can be about 20% faster by using just one comparison per char and for instead of foreach:
bool isDigits(string s)
{
if (s == null || s == "") return false;
for (int i = 0; i < s.Length; i++)
if ((s[i] ^ '0') > ...
Best way to determine user's locale within browser
...F3 on Ubuntu 8.10) reports 'en-GB'. If someone is still using IE6 - around 20% of people - then it's worth allowing for that. IE6 appeared 8 years ago.
– Phil H
Mar 23 '09 at 18:43
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Gzip versus minify
...), 68K (only JSMin), 23K (only gzip), to 19K (JSMin + gzip). That's about 20% saved due to minification.
– Deepak
Sep 27 '12 at 22:04
1
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ios app maximum memory budget
...ed. In my experience, I've had to keep memory much lower to be safe, maybe 20% of what's shown here. Device-to-device differences are also highly variable.
– user1021430
Aug 10 '15 at 19:24
...
Android map v2 zoom to show all the markers
... For better-looking padding, use height instead of width and take 20% instead of 10% of it.
– noob
Jul 31 '17 at 8:50
3
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Iterate through a HashMap [duplicate]
...y might be time-consuming (this method in different Map implementations is 20%-200% slower than method #1). If you have FindBugs installed, it will detect this and warn you about inefficient iteration. This method should be avoided.
Conclusion:
If you need only keys or values from the map, use met...
Python matplotlib multiple bars
...bar group. 0.8 means that 80% of the x-axis is covered
by bars and 20% will be spaces between the bars.
single_width: float, optional, default: 1
The relative width of a single bar within a group. 1 means the bars
will touch eachother within a group, values less than 1 w...