大约有 4,600 项符合查询结果(耗时:0.0351秒) [XML]

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Why doesn't Java offer operator overloading?

...overwrite the previous value of the object referred to by a, then a member function would have to be invoked. Complex a, b, c; // ... a = b.add(c); In C++, this expression tells the compiler to create three (3) objects on the stack, perform addition, and copy the resultant value from the temporar...
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How efficient is locking an unlocked mutex? What is the cost of a mutex?

... 123 I have the choice in between either having a bunch of mutexes or a single one for an object...
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Is gcc's __attribute__((packed)) / #pragma pack unsafe?

...cked__)) my_struct { char c; int i; }; struct my_struct a = {'a', 123}; struct my_struct *b = &a; int c = a.i; int d = b->i; int *e __attribute__((aligned(1))) = &a.i; int *f = &a.i; Here, the type of a is a packed struct (as defined above). Similarly, b is a pointer to a p...
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How can I perform a culture-sensitive “starts-with” operation from the middle of a string?

...ing to use CompareOptions.IgnoreCase. Unfortunately there is no case fold function built-in and the poor man's case folding doesn't work either because there is no full case mapping - the ToUpper method doesn't turn ß into SS. For example this works in Java (and even in Javascript), given string...
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How are virtual functions and vtable implemented?

... 123 How are virtual functions implemented at a deep level? From "Virtual Functions in C++": W...
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Why is “while ( !feof (file) )” always wrong?

...tespace. Using C++ iostreams, it goes like this: std::string input = " 123 "; // example std::istringstream iss(input); int value; if (iss >> value >> std::ws && iss.get() == EOF) { consume(value); } else { // error, "input" is not parsable as an inte...
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Why are Subjects not recommended in .NET Reactive Extensions?

...sage2(), and message3() as messages are generated. It seems like messageX[123] would call OnNext on a subject, but is there a better way? – James Moore Apr 11 '16 at 17:18 1 ...
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File I/O in Every Programming Language [closed]

...but I did the best I could. Let the downvoting begin! :) I still find it a fun exercise. HAI CAN HAS STDIO? PLZ OPEN FILE "FILEIO.TXT" ITZ "TehFilez"? AWSUM THX BTW #There is no standard way to output to files yet... VISIBLE "Hello" ON TehFilez BTW #There isn't a standard...
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NOT using repository pattern, use the ORM as is (EF)

...gration to another DB technology or b) you're choosing a DB technology for fun or c) something has gone horribly wrong with the first technology you decided to use. Why throw away the rich LINQ syntax? LINQ and EF were developed so you could do neat stuff with it to read and traverse object graphs...
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Why does the C preprocessor interpret the word “linux” as the constant “1”?

...d unix macro: main() { printf(&unix["\021%six\012\0"],(unix)["have"]+"fun"-0x60);} It prints "unix", but for reasons that have absolutely nothing to do with the spelling of the macro name. share | ...