大约有 46,000 项符合查询结果（耗时：0.0719秒） [XML]
Generating random strings with T-SQL
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40
When generating random data, specially for test, it is very useful to make the data random, but ...
What is the advantage of using forwarding references in range-based for loops?
...der:
#include <vector>
int main()
{
std::vector<bool> v(10);
for (auto& e : v)
e = true;
}
This doesn't compile because rvalue vector<bool>::reference returned from the iterator won't bind to a non-const lvalue reference. But this will work:
#include <v...
When to use SELECT … FOR UPDATE?
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+50
The only portable way to achieve consistency between rooms and tags and making sure rooms are never returned after they had been delet...
Why java classes do not inherit annotations from implemented interfaces?
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edited Oct 30 '13 at 12:58
thSoft
18.5k55 gold badges7979 silver badges9696 bronze badges
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Why does my application spend 24% of its life doing a null check?
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180
The tree is massive
By far the most expensive thing a processor ever does is not executing ...
How do I get the day of week given a date?
... import datetime
>>> datetime.datetime.today()
datetime.datetime(2012, 3, 23, 23, 24, 55, 173504)
>>> datetime.datetime.today().weekday()
4
From the documentation:
Return the day of the week as an integer, where Monday is 0 and Sunday is 6.
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fastest MD5 Implementation in JavaScript
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170
I've heard Joseph's Myers implementation is quite fast. Additionally, he has a lengthy article o...
Seedable JavaScript random number generator
The JavaScript Math.random() function returns a random value between 0 and 1, automatically seeded based on the current time (similar to Java I believe). However, I don't think there's any way to set you own seed for it.
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INSERT IF NOT EXISTS ELSE UPDATE?
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330
Have a look at http://sqlite.org/lang_conflict.html.
You want something like:
insert or replac...
How can I change image tintColor in iOS and WatchKit
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edited Apr 20 at 5:15
PhillipJacobs
1,10911 gold badge88 silver badges2020 bronze badges
a...