This function helps add progress-reporting to any function - given function f() and progressor p(), it will return a new function that calls f() and then (on-exiting) will call p() after every iteration.
This is inspired by purrr's safely, quietly, and possibly function decorators.
progressively(f, p = NULL)a function that does the same as f but it calls p() after iteration.
a function to add progressr functionality to.
a progressor function as created by progressr::progressor()