When it becomes 12:59:59. the code triggers a subroutine that quickly runs the hands (or arcs) backward and resets the time to 1:00 - which is always fun to wait for and watch.
The dispatcher can either contain the actual code used to deal with a particular element as an anonymous subroutine or it can contain a reference to a named subroutine defined elsewhere.
分派表可以包含用来处理特定元素的实际代码(匿名子例程)，也可以包含对别处定义的命名子例程的引用。
3
To use these files, we'll need to update the cmdSearch.pl code with the loading subroutine.