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Get the client IP address using PHP [duplicate]
... GeriBoss, it's not so hard to figure out a solution to that phpsadness test case and make the code more readable at the same time: echo (FALSE ? "a" : (FALSE ? "b" : "c"))."\n"; echo (FALSE ? "a" : (TRUE ? "b" : "c"))."\n"; echo (TRUE ? "a" : (FALSE ? "b" : "c"))."\n"; echo (TRUE ? "a" : (TRUE ...
JavaScript global event mechanism
... @MarsRobertson I understand. It probably overwrites. Yes, it does, just tested. Using addEventListener would be better.
– localhoost
Nov 21 '19 at 14:15
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Is the C# static constructor thread safe?
...n is thread safe for the initial construction, that is, no locking or null testing is required for constructing the Singleton object. However, this does not mean that any use of the instance will be synchronised. There are a variety of ways that this can be done; I've shown one below.
public class ...
Removing multiple keys from a dictionary safely
... to use for key in set(the_dict) & entries: and bypass the key in dict test.
– DylanYoung
Apr 15 at 15:30
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C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
...load(std::memory_order_acquire); p; p = p->next_) {
if (!p->active_.test_and_set()) {
return p;
}
}
auto p = new HazardPointer<T>();
p->active_.test_and_set();
do {
p->next_ = head_list_.load(std::memory_order_acquire);
} while (!head_list_.co...
Principal component analysis in Python
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You might have a look at MDP.
I have not had the chance to test it myself, but I've bookmarked it exactly for the PCA functionality.
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Check if a string is a date value
...he same on all platforms? In all locales? In the future?) or you can use a tested solution and use your time to improve it, not reinvent it. All of the libraries listed here are open source, free software.
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How do I force a DIV block to extend to the bottom of a page even if it has no content?
...it a bit.
This site has some excellent examples:
http://www.brunildo.org/test/html_body_0.html
http://www.brunildo.org/test/html_body_11b.html
http://www.brunildo.org/test/index.html
I also recommend going to http://quirksmode.org/
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Adding a new value to an existing ENUM Type
..._type_check CHECK (((type)::text = ANY ((ARRAY['exam'::character varying, 'test'::character varying, 'extra'::character varying, 'midterm'::character varying, 'final'::character varying])::text[])))
– user2260237
Dec 19 '14 at 9:23
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How can I use “sizeof” in a preprocessor macro?
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The macro does not work in GNU gcc (tested at version 4.8.4) (Linux). At the ((void)sizeof(... it errors with expected identifier or '(' before 'void' and expected ')' before 'sizeof'. But in principle size_t x = (sizeof(... instead does work as intended. Yo...