示例#1
0
 /**
  * Binds the given function across each element of this list with a final join.
  *
  * @param f The function to apply to each element of this list.
  * @return A new list after performing the map, then final join.
  */
 public <B> NonEmptyList<B> bind(final F<A, NonEmptyList<B>> f) {
   final List.Buffer<B> b = new List.Buffer<B>();
   final NonEmptyList<B> p = f.f(head);
   b.snoc(p.head);
   b.append(p.tail);
   tail.foreachDoEffect(
       new Effect1<A>() {
         public void f(final A a) {
           final NonEmptyList<B> p = f.f(a);
           b.snoc(p.head);
           b.append(p.tail);
         }
       });
   final List<B> bb = b.toList();
   return nel(bb.head(), bb.tail());
 }
示例#2
0
 /**
  * Returns a potential non-empty list from the given list. A non-value is returned if the given
  * list is empty.
  *
  * @param as The list to construct a potential non-empty list with.
  * @return A potential non-empty list from the given list.
  */
 public static <A> Option<NonEmptyList<A>> fromList(final List<A> as) {
   return as.isEmpty() ? Option.<NonEmptyList<A>>none() : some(nel(as.head(), as.tail()));
 }
示例#3
0
 /**
  * Zips this non empty list with the given non empty list using the given function to produce a
  * new list. If this list and the given list have different lengths, then the longer list is
  * normalised so this function never fails.
  *
  * @param bs The non empty list to zip this non empty list with.
  * @param f The function to zip this non empty list and the given non empty list with.
  * @return A new non empty list with a length the same as the shortest of this list and the given
  *     list.
  */
 public <B, C> NonEmptyList<C> zipWith(final List<B> bs, final F2<A, B, C> f) {
   final List<C> list = toList().zipWith(bs, f);
   return nel(list.head(), list.tail());
 }
示例#4
0
 /**
  * Sorts this non empty list using the given order over elements using a <em>merge sort</em>
  * algorithm.
  *
  * @param o The order over the elements of this non empty list.
  * @return A sorted non empty list according to the given order.
  */
 public NonEmptyList<A> sort(final Ord<A> o) {
   final List<A> list = toList().sort(o);
   return nel(list.head(), list.tail());
 }
示例#5
0
 /**
  * Reverse this non empty list in constant stack space.
  *
  * @return A new non empty list with the elements in reverse order.
  */
 public NonEmptyList<A> reverse() {
   final List<A> list = toList().reverse();
   return nel(list.head(), list.tail());
 }
示例#6
0
 /**
  * Intersperses the given argument between each element of this non empty list.
  *
  * @param a The separator to intersperse in this non empty list.
  * @return A non empty list with the given separator interspersed.
  */
 public NonEmptyList<A> intersperse(final A a) {
   final List<A> list = toList().intersperse(a);
   return nel(list.head(), list.tail());
 }