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How does Duff's device work?
...he article on Wikipedia on the Duff's device , and I don't get it. I am really interested, but I've read the explanation there a couple of times and I still don't get it how the Duff's device works.
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What does it mean when MySQL is in the state “Sending data”?
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And what if MySQL is "sending data" while using 99% CPU, with very little disk I/O?
– rustyx
Apr 19 '17 at 20:25
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上班狗来算算 你离财务自由还差多少钱？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...鸡冻呢~
2。财务自由需要多少软妹币？
这是一个复杂的问题。胡润曾对财务自由的实现给出了一个数字——1亿元。他认为1亿元之后再多的钱就没有必要，说白了就是花不完了，“要想活得舒服，有一套别墅外加在市中心有一...
Where does the iPhone Simulator store its data?
...pp in the simulator
Open Activity Monitor
Find the name of your app in the CPU tab
Double-click it and open the "Open Files and Ports"
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Postgres and Indexes on Foreign Keys and Primary Keys
Does Postgres automatically put indexes on Foreign Keys and Primary Keys? How can I tell? Is there a command that will return all indexes on a table?
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Which is better option to use for dividing an integer number by 2?
...ter of the compiler got to choose among several implementation choices, usually with substantial constraints. Here, one constraint is that the % and / operators must be consistent for both positive and negative operands so that (a/b)*b+(a%b)==a is true regardless of the signs of a and b. Usually, th...
Quick Sort Vs Merge Sort [duplicate]
...ps in Quick sort are lesser than Merge sort. Swap operation is costlier on CPU than compare operation, as mentioned here. Testing on home laptop Quick sort takes 0.6 sec to sort millon items unlike merge sort taking 1 sec where as insertion sort takes 2.8 hours.
– overexchange
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Are non-synchronised static methods thread safe if they don't modify static class variables?
... case) are also thread-safe because once created they can't be changed and all threads see the same value. On the other hand if the method was accepting (mutable) Date you could have had a problem. Two threads can simultaneously modify that same object instance, causing race conditions and visibilit...
Why is volatile needed in C?
...olatile variable.
There are at least three common reasons to use it, all involving situations where the value of the variable can change without action from the visible code: When you interface with hardware that changes the value itself; when there's another thread running that also uses the ...
What is the best way to compare floats for almost-equality in Python?
...the magnitudes of the two arguments; as the values get larger, so does the allowed difference between them while still considering them equal.
abs_tol is an absolute tolerance that is applied as-is in all cases. If the difference is less than either of those tolerances, the values are considered eq...