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    Let's say I have an array in C++: double* velocity = new double[100]; Using the GDB command line, I can ... as such. Anyone know what it is? See Question&Answers more detail:os...
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    I have binary image with polylines created with: cv2.polylines(binaryImage,contours,1, (255,255,255)) What I ... . Please share your thoughts.. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Assume that I have two AVL trees and that each element from the first tree is smaller then any element from ... haven't found anything useful. See Question&Answers more detail:os...
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    The main reason for using atomics over mutexes, is that mutexes are expensive but with the default memory model ... is very little contention. See Question&Answers more detail:os...
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    What is the difference between std::mem_fun and std::mem_fn? Why is the naming so confusing? Boost's documentation ... still use std::mem_fun? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm trying to write a type trait to detect if a type has overloaded operator<<() suitable to use to an output ... /ikSBoT What am I doing wrong? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    So, after researching everywhere for it, I cannot seem to find how to create a class arrow operator, i.e. ... I properly declare/prototype it? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm involved in one of those challenges where you try to produce the smallest possible binary, so I' ... : unresolved external symbol _memset See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Are there any definitions of functions like sqrt(), sin(), cos(), tan(), log(), exp() (these from math.h ... wanted to know how do they work. See Question&Answers more detail:os...
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    This equation swaps two numbers without a temporary variable, but uses arithmetic operations: a = (a+b) - (b=a) ... ? I was thinking about XOR. See Question&Answers more detail:os...
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    I have a function foo(int[] nums) which I understand is essentially equivalent to foo(int* nums). Inside foo ... third option that I'm missing? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am using CMake for building my projects on Windows (Visual Studio) as well as on Linux machines(gcc). I'd ... when the build type is Debug.) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    As per C++11 rules 6 things (default constructor, copy constructor, move constructor, copy assignment, move assignment ... deleted. why ? } See Question&Answers more detail:os...
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    I'm flip-flopping between naming conventions for typedef'ing the boost::shared_ptr template. For example: typedef boost:: ... , would you? :-) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm using shared_ptr and STL extensively in a project, and this is leading to over-long, error-prone ... add additional options for discussion. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    The C++11 standard specifies a number of different engines for random number generation: linear_congruential_engine, ... generally be preferred? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    C++11 14.8.2 - Template Argument Deduction - [temp.deduct] 7 The substitution occurs in all types ... of template argument substitution matter? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm writing a server in C++ using Boost ASIO library. I'd like to get the string representation of client IP ... Does anyone know how to do it? See Question&Answers more detail:os...
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    If you want to use Qt, you have to embrace quint8, quint16 and so forth. If you want to use GLib, you ... some kind of tradition for libraries? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a question about objects matching with OpenCV. I'm useing SURF algorithm implemented in opencv 2.3 to first ... cv::waitKey(); return 0; See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Learning c++ and trying to get familiar with some patterns. The signals2 doc clearly has a vast array ... signals2::connection m_connection; }; See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a example with me where in which the alignment of a type is guaranteed, union max_align . I am ... practically, to explain my friend. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have a large vector. The ways that I use multiply the run-time of the program hugely. The first is ... text file immediately with line breaks? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm trying for long time to understand the benefit of generator expressions such as $<xxx:yy> in CMake, ... examples. Many thank in advance See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'd want your input which gcc compiler flags to use when optimizing for Xeons? There's no 'xeon' in mtune or ... so which is the closest match? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm having a hard time understanding why #include <iostream> using namespace std; int fib(int x) { if (x ... 1 shouldn't it eventually return? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    In gcc-4.9 changes it says: UndefinedBehaviorSanitizer (ubsan), a fast undefined behavior detector, has been added ... or what features it has? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I was wondering is it safe to do so? wchar_t wide = /* something */; assert(wide >= 0 && wide < 256 ... wide char will fall within ASCII range. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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