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Objective-C: Where to remove observer for NSNotification?
...eed the notifications". This is obviously not a satisfying answer.
I'd recommend, that you add a call [notificationCenter removeObserver: self] in method dealloc of those classes, which you intend to use as observers, as it is the last chance to unregister an observer cleanly. This will, however, ...
Reset keys of array elements in php?
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What is a good Hash Function?
... one by Paul Hsieh is the best I've ever used.
http://www.azillionmonkeys.com/qed/hash.html
If you care about cryptographically secure or anything else more advanced, then YMMV. If you just want a kick ass general purpose hash function for a hash table lookup, then this is what you're looking for...
C++ Dynamic Shared Library on Linux
This is a follow-up to Dynamic Shared Library compilation with g++ .
4 Answers
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Lock, mutex, semaphore… what's the difference?
...fferent properties (namely regarding ownership). See for example barrgroup.com/Embedded-Systems/How-To/RTOS-Mutex-Semaphore for details
– nanoquack
Apr 28 '14 at 5:34
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What is the easiest/best/most correct way to iterate through the characters of a string in Java?
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Does the compiler inline the length() method?
– Uri
Oct 13 '08 at 6:25
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Real differences between “java -server” and “java -client”?
...ns share the Java HotSpot runtime environment code base, but use different compilers that are suited to the distinctly unique performance characteristics of clients and servers. These differences include the compilation inlining policy and heap defaults.
Although the Server and the Client VMs are si...
How to pass parameters to a partial view in ASP.NET MVC?
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std::vector performance regression when enabling C++11
... also pass the -flto flag to gcc 4.7.2), the results are identical:
(I am compiling your original code, with container.push_back(Item());)
$ g++ -std=c++11 -O3 -flto regr.cpp && perf stat -r 10 ./a.out
Performance counter stats for './a.out' (10 runs):
35.426793 task-clock ...
Java 8 Streams: multiple filters vs. complex condition
...tions which will yield to a faster execution, if there is any difference.
Combining two filter instances creates more objects and hence more delegating code but this can change if you use method references rather than lambda expressions, e.g. replace filter(x -> x.isCool()) by filter(ItemType::i...