I have a class that has a member which is a vector of vectors. I would like to write a constructor for this class that takes an r-value reference to a single vector as an argument, and moves it into t
This buffer should contain slots (three in this example) of equal length ( 20 in this example) The buffer has to have contiguous memory so that it can be passed to a C function in non-const fashion.
Say I have a vector of null terminates strings some of which may be null pointers. I don\'t know even if this is legal. It is a learning exercise. Example code
Is there a way to avoid c开发者_如何转开发opying large vectors, when a function expects a vector with (pointer to) baseclass objects as input but I only have a vector of (pointers to) derived objects?
Lets say that I have got a vector like this. std::vector<a_complicated_whatever_identifier *> *something
How can I transfer cv::gpu::GpuMat rows to std::vector with as little 开发者_StackOverflowas possible copy operations?
I have a std::vector<unsigned short> that somehow contains numbers that are greater than 300. unsigned short usually only permits 0 to 255, nowhere in开发者_如何学编程 the program attempts to a
Given my_type m; std::vector<my_type> v; 开发者_开发百科 Which runs more quickly? m.generate_data_inside_self();
I know it is a very bad idea, so other suggestions on how to do it efficiently will be well-received.
Often I want to make sure I am in bounds once at the top of my function body. The different ways I do this are:
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