Generate a list of all processes in the system which are neither linked nor monitored.

diagnostics.ex

defmodule Diags do 

 @doc """
 Generate a list of all processes in the system which are neither linked nor monitored.
 """
 def list_non_linked_non_monitored_processes do 
 
    Process.list |> 
    Enum.map( fn pid -> {pid, Process.info( pid, [:links,:monitors,:registered_name])}  end) |> 
    Enum.map(
      fn {pid, words} -> {pid,
        Keyword.get(words,:links),
        Keyword.get(words,:monitors),
        Keyword.get(words,:registered_name)
      }
    end ) |>
    Enum.filter(fn 
      {_,nil,nil_} -> true
      {_,links,monitors,_} -> false
    end) 
  end 
end