Add a to_owned_vec method to IteratorUtil.

src/libstd/iterator.rs

@@ -333,6 +333,18 @@ pub trait IteratorUtil<A> {
     /// ~~~
     fn collect<B: FromIterator<A, Self>>(&mut self) -> B;
 
+    /// Loops through the entire iterator, collecting all of the elements into
+    /// a unique vector. This is simply collect() specialized for vectors.
+    ///
+    /// # Example
+    ///
+    /// ~~~ {.rust}
+    /// let a = [1, 2, 3, 4, 5];
+    /// let b: ~[int] = a.iter().transform(|&x| x).to_owned_vec();
+    /// assert!(a == b);
+    /// ~~~
+    fn to_owned_vec(&mut self) -> ~[A];
+
     /// Loops through `n` iterations, returning the `n`th element of the
     /// iterator.
     ///
@@ -529,6 +541,11 @@ impl<A, T: Iterator<A>> IteratorUtil<A> for T {
         FromIterator::from_iterator(self)
     }
 
+    #[inline]
+    fn to_owned_vec(&mut self) -> ~[A] {
+        self.collect()
+    }
+
     /// Return the `n`th item yielded by an iterator.
     #[inline]
     fn nth(&mut self, mut n: uint) -> Option<A> {