I have following pattern:Pseudo code:I'm unable to come up with some nice clean code for this.This link provides different approaches, but they all look more or less cumbersome to me.
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What is the memory layout of vector of arrays?
can anybody explaine the memory layout ofdoes it provide contiguous memory block of a 2D array with 2 rows of 5 elements?
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Copy std::map into std::vector of pairs
I'm trying to copy a map into a vector of pair, so I can then sort the vector by the second data member of the pairs. I have resolved this doing like this:
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c++ float* array as reference to std::vector<float>
I want to create a std::vector<float> vpd which will be a reference to float*.How should I modify the code, if I want get 23 from cout?
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How to write a function that can take in an array or a vector?
I would like to write a C++ function with one argument such that one can pass in either any of the following types:
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Why is this function producing incorrect values?
I have a simple function template to calculate the average value of a container:I added in the static_cast<>s above to try to force the calculation to the desired type <T>.
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Will a std::vector's capacity ever be reduced?
C++14 final working draft makes the following comment about std::vector:Storage management is handled automatically, though hints can be given to improve efficiency.
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Can STL algorithms and back_inserter preallocate space?
If I have something like:Would STL be able to preallocate space in newVector before processing and adding the new elements? I know it is not a requirement of the algorithm, but would a "good" implementation be able to optimize that? Or, for this kind of case, should I prefer adding...
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Avoid Conversion from single element vector to primitive type
I have a problem with constant single element std::vector when pass through a function. C++ compiler automatically call wrong function when the std::vector variable contain a single element. This is though the policy of C++ design. However is there any explicit method to specify in such a case. Here are...
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Why does emplace_back(“Hello”) call strlen?
Justin's answer on another question made an observation that I find very interesting but can't quite explain. Consider the following code:
