/*
  # Examples
   
  ```
  use based::Base;
  
  let base16 = Base::new("0123456789abcdef");
  let sixteen = base16.from_str::<usize>("10");
  assert_eq!(sixteen.unwrap(), 16);
  ```
  */

    /* 
  # Examples
   
  ```
  use based::Base;
  
  let base16 = Base::new("0123456789abcdef");
  let sixteen = base16.digits::<usize>(16);
  assert_eq!(sixteen, "10");
  ```
  */