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How efficient is locking an unlocked mutex? What is the cost of a mutex?
...bunch of mutexes or a single one for an object.
If you have many threads and the access to the object happens often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking.
How efficient is it to lock a mutex? I.e....
C++ code file extension? .cc vs .cpp [closed]
I have seen C++ code saved as both .cc and .cpp files. Is there a difference between the two?
17 Answers
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Programmatically add custom event in the iPhone Calendar
... access to the user's calendar via "requestAccessToEntityType:completion:" and execute the event handling inside of a block.
2) You need to commit your event now or pass the "commit" param to your save/remove call
Everything else stays the same...
Add the EventKit framework and #import <EventK...
How to add leading zeros?
...s of 10 width 8 too.
anim <- 25499:25504
x <- 10 ^ (0:5)
paste (and it's variant paste0) are often the first string manipulation functions that you come across. They aren't really designed for manipulating numbers, but they can be used for that. In the simple case where we always have t...
What can you do in MSIL that you cannot do in C# or VB.NET? [closed]
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Most .Net languages including C# and VB do not use the tail recursion feature of MSIL code.
Tail recursion is an optimization that is common in functional languages. It occurs when a method A ends by returning the value of method B such that method A's stac...
How to detect when facebook's FB.init is complete
... edited Jun 7 '12 at 18:15
Andrew
2,13522 gold badges1818 silver badges3434 bronze badges
answered Aug 23 '10 at 15:28
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C++ sorting and keeping track of indexes
Using C++, and hopefully the standard library, I want to sort a sequence of samples in ascending order, but I also want to remember the original indexes of the new samples.
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SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
...SL_CERT_FILE=/usr/local/etc/openssl/certs/cert.pem
– andersjanmyr
Dec 20 '12 at 12:04
5
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How do I programmatically “restart” an Android app?
Firstly, I know that one should not really kill/restart an application on Android. In my use case I want to factory-reset my application in a specific case where a server sends a specific information to the client.
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How to do relative imports in Python?
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I don't understand: where is the answer here? How can one import modules in such a directory structure?
– Tom
Sep 29 '12 at 16:34
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