$ = function() { alert('I am in the $ function'); } JQuery is a very famous JavaScript library and they have decided to put their entire framework inside a function named jQuery. To make it easier for people to …

Actually, the above function will be treated as function expression without a name. The main purpose of wrapping a function with close and open parenthesis is to avoid polluting the global space.

Dec 8, 2010 · About __func__: "The identifier __func__ is implicitly declared by the translator as if, immediately following the opening brace of each function definition, the declaration: static const char …

May 5, 2009 · A callback function is a function which is: accessible by another function, and is invoked after the first function if that first function completes A nice way of imagining how a callback function …

A function is outside the namespace of the rest of the program. It is like a separate program that can have the same variable names as used in the calling program, and whatever it does to them does …

357 Function pointers in C can be used to perform object-oriented programming in C. For example, the following lines is written in C:

Is it possible to pass functions with arguments to another function in Python? Say for something like: def perform (function): return function () But the functions to be passed will have argume...

It was attempted to call a value like a function, but the value is not actually a function. Some code expects you to provide a function, but that didn't happen.

When the function is used in a template parameter it 'decays' into a pointer to the passed function. It's analagous to how arrays decay into pointers when passed as arguments to parameters. Of course, …

If a function is constructable, it can be called with new, i.e. new User(). If a function is callable, it can be called without new (i.e. normal function call). Functions created through function declarations / …