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How to handle classes with differently named member functions in algorithms?


How to handle classes with differently named member functions in algorithms?

By : user3099436
Date : January 11 2021, 03:32 PM
I hope this helps . It does not make sense to change the classes Zoo and Library just for the sake of f.
It will be better to create overloaded functions for the purposes of f. You can add f-specific code in those functions without affecting the classes themselves.
code :
template<typename T>
void f(T t) {
    do_something(geItemForF(t), getNumForF(t));
}

Animal const& geItemForF(Zoo const& zoo) { ... }
int getNumForF(Zoo const& zoo) { ... }

Book const& geItemForF(Libraryconst& library) { ... }
int getNumForF(Libraryconst& library) { ... }


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Why are anonymous functions treated differently from named functions here?

Why are anonymous functions treated differently from named functions here?


By : dctoph
Date : March 29 2020, 07:55 AM
I hope this helps . Function declarations are available anywhere in the scope they're defined in, even before their physical definitions.
var bar = function() { ... }; is a normal variable that happens to hold a function. Like all other variables, it can only be used after its assigned.
Accessing member functions of other classes into member function of `this` class using composition or friend classes

Accessing member functions of other classes into member function of `this` class using composition or friend classes


By : Prattap
Date : March 29 2020, 07:55 AM
it fixes the issue FibonacciDynamic dy(); is declaration of method FibonacciDynamic fibonacci::dy();
you should remove parentheses to make it data member declaration:
code :
...
FibonacciDynamic dy;
...
Why are classes with virtual functions aligned differently than classes without?

Why are classes with virtual functions aligned differently than classes without?


By : dahb
Date : March 29 2020, 07:55 AM
I hope this helps you . Inspired by this cppcon talk by Richard Powell I have created the following code snippet to fool around:
code :
sizeof(void*)8
Are member functions defined in a class definition compiled differently than member functions defined elsewhere in C++?

Are member functions defined in a class definition compiled differently than member functions defined elsewhere in C++?


By : long
Date : March 29 2020, 07:55 AM
I wish this helpful for you Yes, there is a difference. If a member function is defined inside class definition then the compiler tries to make it an inline function. For your example, the function is simple enough to make it inline. So the compiler has made bar inline and you only see symbol of baz.
Whether it will be good or bad depends largely on the specific functions and your use case. Inline function do not need an actual function call, the there is a performance improvement there. But the downside is if you include the class header in many places then that will increase the binary size.
Why are STL algorithms called differently for different classes?

Why are STL algorithms called differently for different classes?


By : anthony vercini
Date : March 29 2020, 07:55 AM
around this issue Basically, there are some special cases that have to do with the nature of specific containers.
In general the free functions std::remove, std::remove_if, and std::reverse declared in the header will work on vectors, lists, deques, and arrays by copying and moving elements. (They will not, of course, work on sets or maps, since for those you are not free to rearrange elements willy-nilly.) Note that std::remove does not delete elements from containers.
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