tail() for Rust iterators

iterator_tail.rs

use std::iter::FromIterator;

trait ExtendedIterator: Iterator {
  fn tail<B>(&mut self) -> B where B:FromIterator<Self::Item>, Self::Item: Eq + Clone, Self: Sized{
    self.skip(1).collect::<B>()
  }
}

impl<I> ExtendedIterator for I where I: Iterator {}

fn main() {
  let arr = vec!["okok@a.a.com", "a", "b"];
  let t: Vec<_> = arr.iter().tail();
  println!("Tail: {:?}", t);
  
  // But more interestingly, instead of:
  let split = "okok@oko@k.com".split("@");
  let vec:Vec<&str> = split.skip(1).collect();
  println!("Before: {:?}", vec);
  
  // you can now do:
  let tail: Vec<&str> = "okok@oko@k.com".split("@").tail();
  // because Split implements Iterator !!
  println!("After: {:?}", tail);
}