A common gap usually appears in a trading range or congestion area, and reinforces the apparent lack of interest in the stock at that time. Many times this is further exacerbated by low trading volume. Being aware of these types of gaps is good, but doubtful that they will produce a trading opportunities.
Conversion functions (C++ only) You can define a member function of a class, called a conversion function, that converts from the type of its class to another specified type.
Developers are often confused by what a callback is because of the name of the damned thing. A callback function is a function which is: passed as an argument to another function, and, is invoked after some kind of event. Once its parent function completes, the function passed as an argument is then called.