[c++] How to initialize std::vector from C-style array?

Well, Pavel was close, but there's even a more simple and elegant solution to initialize a sequential container from a c style array.

In your case:

w_ (array, std::end(array))
  • array will get us a pointer to the beginning of the array (didn't catch it's name),
  • std::end(array) will get us an iterator to the end of the array.

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