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1. What causes the strange behaviors when calling a lambda with [&] capture clause inside which a variable outside current scope is used in C++?
   12 votes
2. In C++ threads, should I pass shared_ptr by value or reference?
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3. std::unordered_map insert invalidates only iterators but not references and pointers to the element node
   6 votes
4. How to lock multiple locks where some are shared and some are not in C++
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5. What does line is supposed to mean?
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