reflection2_5.go

// Takes in a function and a time.Duration and returns a caching version of the function
//
// The limitations on memoization are:
//
// — there must be at least one in parameter
//
// — there must be at least one out parameter
//
// — the in parameters must be comparable. That means they cannot be of kind slice, map, or func,
// nor can input parameters be structs that contain (at any level) slices, maps, or funcs.
//
// Be aware that if your memoized function has any side-effects (does anything that isn’t
// reflected in the output, like print to the screen or write to a database) the side-effects
// will be performed by the function only the first time that the function is invoked with
// particular set of values.
func Cacher(f interface{}, expiration time.Duration) (interface{}, error) {
	return f, nil
}