Explain in simplest way(maybe some illustrations) why should/shouldn't I use friend function?
14488
When should you use 'friend' in C++?
119066
How to access private data members outside the class without making "friend"s?
12297
When to and when not to use pointers in Objective-C
106469
Friend or Friends in this sentence
156911
When to use static member function?
97840
What is the point of using a named function expression?
94665
PHP equivalent of friend or internal
58024
How do you mark a struct template as friend?
40750
Python function attributes - uses and abuses
57072
should function be defined before it is used in python?
79050
Python ( or general programming ). Why use  instead of != and are there risks?
8045
Python List vs. Array - when to use?
66455
Getting a better understanding of callback functions in JavaScript
38506
Use of function pointer in C
100032
Friend of a friend in PHP/MySQL?
54864
Why use non-member begin and end functions in C++11?
138184
Why use pointers?