Adding copyInto and toVector methods to collections.

* Added generic copyInto method for collections.  For any collection with a CanBuildFrom, can convert a generic collection into it using the builder.
* Added specifici toVector method for collections.   This is more efficient than copyInto if the collection is a Vector.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/library/scala/collection/TraversableLike.scala b/src/library/scala/collection/TraversableLike.scala
index 3716a318d9..898ea4d654 100644
--- a/src/library/scala/collection/TraversableLike.scala
+++ b/src/library/scala/collection/TraversableLike.scala
@@ -616,6 +616,13 @@ trait TraversableLike[+A, +Repr] extends Any
   def toTraversable: Traversable[A] = thisCollection
   def toIterator: Iterator[A] = toStream.iterator
   def toStream: Stream[A] = toBuffer.toStream
+  def toVector: Vector[A] = copyInto[Vector]
+  def copyInto[Col[_]](implicit cbf: CanBuildFrom[Nothing, A, Col[A @uV]]): Col[A @uV] = {
+    val b = cbf()
+    b.sizeHint(this)
+    b ++= thisCollection
+    b.result
+  }
 
   /** Converts this $coll to a string.
    *