user1899020 questions

• Is the virtual method in a simple class really virtual?
• What should I check: cpu time or wall time?
• What is the best way to define a double constant in a namespace?
• When are Qt slots called?
• Make use of short and definition-available virtual methods for optimization?
• Is floating-point multiplication commutative? [duplicate]
• relations between all kinds of initialization and constructions?
• How to get the index of an element in a tuple via address?
• How to make an array's derived type accept aggregate initialization?
• How to avoid forgetting to define operator== in subclasses?

user1899020 answers