Michael Tsang questions

• Is it possible to indirectly call the constructor function where X is an ES6 class? [duplicate]
• Why is container.value_type illegal in C++
• Is SQL unknown identical to NULL?
• Why does returning lambdas between branches of ternary operator work for some lambdas?
• Incorrect datetime value for future date in mysql
• Is it possible to make a real function type in C++ which is callable with itself?

Michael Tsang answers