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MongoDB与内存 - 大数据 & AI - 清泛网 - 专注C++内核技术
MongoDB与内存MongoDB-And-Memory但凡初次接触MongoDB的人，无不惊讶于它对内存的贪得无厌，至于个中缘由，我先讲讲Linux是如何管理内存的，再说说MongoDB是如何使用内存的...但凡初次接触MongoDB的人，无不惊讶于它对内存的贪得无厌，...
onSaveInstanceState () and onRestoreInstanceState ()
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Usually you restore your state in onCreate(). It is possible to restore it in onRestoreInstanceState() as well, but not very common. (onRestoreInstanceState() is called after onStart(), whereas onCreate() is called before onStart().
Use the put methods to store values in onSaveIns...
Algorithm to generate all possible permutations of a list?
Say I have a list of n elements, I know there are n! possible ways to order these elements. What is an algorithm to generate all possible orderings of this list? Example, I have list [a, b, c]. The algorithm would return [[a, b, c], [a, c, b,], [b, a, c], [b, c, a], [c, a, b], [c, b, a]].
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Bootstrap right Column on top on mobile view
I have a Bootstrap Page like this:
11 Answers
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How to redirect cin and cout to files?
...ut.txt
}
}
int main()
{
std::ifstream in("in.txt");
std::streambuf *cinbuf = std::cin.rdbuf(); //save old buf
std::cin.rdbuf(in.rdbuf()); //redirect std::cin to in.txt!
std::ofstream out("out.txt");
std::streambuf *coutbuf = std::cout.rdbuf(); //save old buf
std::cout.rd...
How to mark a class as Deprecated? [duplicate]
...on and the last one is to mark an Error in compile time instead of a warning.
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How to prune local tracking branches that do not exist on remote anymore
With git remote prune origin I can remove the local branches that are not on the remote any more.
31 Answers
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Can attributes be added dynamically in C#?
Is it possible to add attributes at runtime or to change the value of an attribute at runtime?
10 Answers
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Link to add to Google calendar
...lear about the exact format to have a link on a website that will add a single event to a users Google calendar. I see that eventbrite has done it here but I would love some clear specs or links in the right direction
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Extract first item of each sublist
I am wondering what is the best way to extract the first item of each sublist in a list of lists and append it to a new list. So if I have:
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