- How to convert number to string effectively and back?
lexical_cast<int>(my_string);
lexical_cast(my_int);
- In templates always write
template< typename T > class X : public T {
void f() { return this->m();} // best use, calls parent or current method(virtual)
void h() {return m(); } // calls possibly global method m()!!!
void g() { return T::m();// calls parent method but disables virtual method
}
- So called Policy class in associative containers
map<K,T,cmp> // cmp funktor if there is no operator "<" for K
// so we need cmp
struct cmp {
bool operator () (K a, K b) { return /* correct ordering */ }
}
Problems: Policy class creates object cmp, and operator is not static as Policy class should have