大约有 44,000 项符合查询结果(耗时:0.0307秒) [XML]

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What is the meaning of “__attribute__((packed, aligned(4))) ”

...es in some cases. Consider the following structure: typedef struct { char Data1; int Data2; unsigned short Data3; char Data4; }sSampleStruct; sizeof(sSampleStruct) will be 12 rather than 8. Because of structure padding. By default, In X86, structures will be padded to 4-byte ...
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Is it possible to print a variable's type in standard C++?

...f typename std::remove_reference<T>::type TR; std::unique_ptr<char, void(*)(void*)> own ( #ifndef _MSC_VER abi::__cxa_demangle(typeid(TR).name(), nullptr, nullptr, nullptr), #else nullptr, #endif ...
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Is std::vector so much slower than plain arrays?

... created. What happens if we change Pixel to: struct Pixel { unsigned char r, g, b; }; Result: about 10% faster. Still slower than an array. Hm. # ./vector UseArray completed in 3.239 seconds UseVector completed in 5.567 seconds Idea #4 - Use iterator instead of loop index How about usin...
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IEnumerable and Recursion using yield return

...control.Controls .Where(c => c is T) .Concat(control.Controls .SelectMany(c =>c.GetDeepControlsByType<T>())); } share | ...
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How to get current page URL in MVC 3

...ty(knownRequestHeader)) { this._url = new Uri(string.Concat(new string[] { this._wr.GetProtocol(), "://", knownRequestHeader, this.Path, text })); } } catch ...
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What are the new documentation commands available in Xcode 5? [closed]

...e brief text (with no formatting); if no brief text exists, it will show a concatenation of all the text up to the first @block; if none exists (e.g. you begin with @return), then it will concat all the text striping away all @commands. 2. Option-clicking an identifier name: 3. In the Quick Help...
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How to determine CPU and memory consumption from inside a process?

...hysMemUsedByMe = pmc.WorkingSetSize; CPU currently used: #include "TCHAR.h" #include "pdh.h" static PDH_HQUERY cpuQuery; static PDH_HCOUNTER cpuTotal; void init(){ PdhOpenQuery(NULL, NULL, &cpuQuery); // You can also use L"\\Processor(*)\\% Processor Time" and get individual CPU...
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How do pointer to pointers work in C?

...his case, if this is the only occurrence of "hello" in memory then, const char *c = "hello"; ... defines c to be a pointer to the (read-only) string "hello", and thus contains the value 63. c must itself be stored somewhere: in the example above at location 58. Of course we can not only point to ...
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How can I get a java.io.InputStream from a java.lang.String?

...but that has been @Deprecrated (with good reason--you cannot specify the character set encoding): 8 Answers ...
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Base64: What is the worst possible increase in space usage?

...y possibly become when converted to a Base64 string (assuming one byte per character)? 5 Answers ...