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c++vectormapsunsigned-char

Using a vector of unsigned chars in a map

I need help using unsigned chars in std::vectors that are inside of a std::map.

This is how I declare the std::map:

std::map<int, std::vector<unsigned char>> DataMap;

The problem comes when I try to assign a std::vector to the std::map.

it->first comes from another std::map, as this code is inside a loop.

std::vector<unsigned char> charHolder;
for(int i = 0; i < 10; i++)
{
    charHolder.push_back('2');
}

DataMap.insert(std::pair<int, std::vector<unsigned char>(it->first, charHolder));

The errors:

Template argument 2 is invalid

I need to assigned a char[] array to the 2 place in the std::map. I've tried an array, but I had no luck.

Solution

  • You are missing a > character

    DataMap.insert (std::pair<int, std::vector<unsigned char>>(it->first, charHolder));
                                                         ^

    You may use uniform initializer as following:

    DataMap.insert ({it->first, charHolder});