637     /// assert_eq!(["hello", "world"].join(" "), "hello world");
638     /// assert_eq!([[1, 2], [3, 4]].join(&0), [1, 2, 0, 3, 4]);
639     /// assert_eq!([[1, 2], [3, 4]].join(&[0, 0][..]), [1, 2, 0, 0, 3, 4]);
643     pub fn join<Separator>(&self, sep: Separator) -> <Self as Join<Separator>>::Output  in join()  method
645         Self: Join<Separator>,  in join()
647         Join::join(self, sep)  in join()
662     #[deprecated(since = "1.3.0", note = "renamed to join")]
663     pub fn connect<Separator>(&self, sep: Separator) -> <Self as Join<Separator>>::Output  in connect()
665         Self: Join<Separator>,  in connect()
667         Join::join(self, sep)  in connect()
760 /// Helper trait for [`[T]::join`](slice::join)
762 pub trait Join<Separator> {  interface
767     /// Implementation of [`[T]::join`](slice::join)
769     fn join(slice: &Self, sep: Separator) -> Self::Output;  in join()  method
789 impl<T: Clone, V: Borrow<[T]>> Join<&T> for [V] {
792     fn join(slice: &Self, sep: &T) -> Vec<T> {  in join()  method
812 impl<T: Clone, V: Borrow<[T]>> Join<&[T]> for [V] {
815     fn join(slice: &Self, sep: &[T]) -> Vec<T> {  in join()  method