Are you asking how this code works and for help understanding its use, or are you asking how to improve the code? If the first, then it's offtopic on Code Review and Stack Overflow. If it's the second, and the code is
your code (not someone else's) and you want to get help improving it, then it
might be on topic at Code Review. Note that you do indicate it was referenced from somewhere else, so I'm not sure it's even your code. —
Thomas Ward 21 secs ago