Book Reading

NOTE My notes on Chapter 3, Item 13 of Effective Modern C++ written by Scott Meyers. Some (or even all) of the text can be similar to what you see in the book, as these are notes: I’ve tried not to be unnecessarily creative with my words. :) In C++, iterators come handy to point at memory addresses of STL containers. For example, // C++11 std::vector<int> x {11, 9, 23, 6}; // begin() member function returns an iterator, which points to the first // memory address of the container x std::vector<int>::iterator it = x.begin(); While the general practice is to use const whenever possible, but programmers tend to use whenever it’s practical. const_iterators is particularly suggested when you want to use iterators, but you don’t need to modify what it points to. ...

NOTE My notes on Chapter 3, Item 12 of Effective Modern C++ written by Scott Meyers. Some (or even all) of the text can be similar to what you see in the book, as these are notes: I’ve tried not to be unnecessarily creative with my words. :) Overriding != Overloading Example of virtual function overriding: // Base class class Base { public: virtual void doWork(); // ... }; // Derived class from Base class Derived: public Base { public: // virtual is optional // this will "override" Base::doWork virtual void doWork(); // ... }; // This creates a "Base" class pointer to "Derived" class object std::unique_ptr<Base> upb = std::make_unique<Derived>(); // Derived doWork() function is invoked upb->doWork(); This is how virtual function overriding allows to invoke a “derived class function” from a base class interface. ...

Prefer deleted functions to private undefined ones This item (11) in the chapter 3 focuses on: Why and How to prevent users calling particular functions? C++-98 and C++-11 approach What’s the difference between deleting a function vs declaring a member function private (and not defining them)? NOTE These are my notes on Chapter 3, Item 11 of Effective Modern C++ written by Scott Meyers. Some (or even all) of the text can be similar to what you see in the book, as these are notes: I’ve tried not to be unnecessarily creative with my words. :) ...

Scoped vs Unscoped Enums General rule: declaring a name inside curly braces is limited to that scope. Exception: C++-98 style Enums NOTE My notes on Chapter 3, Item 10 of Effective Modern C++ written by Scott Meyers. Some (or even all) of the text can be similar to what you see in the book, as these are notes: I’ve tried not to be unnecessarily creative with my words. :) ...

One solution to avoiding using long type names: // So C++98 like typedef std::unique_ptr<std::unordered_map<std::string, std::string>> UPtrMapSS; ...