4 ms·

Usually you return a closure with impl Fn. Another use case is to return an iterator. I wrote a post about it. Let me know if it helps. https://medium.com/@io

• ejanus 8y ago
  Your code is nothing but Magic . I have spent time trying to wrap my head around it. I am almost there but I don't understand .map(<&str>::into) . Monoid implements String
  • ejanus 8y ago
    Finally, that code is itched in my brain