use str::with_capacity here too

1 files changed, 1 insertions, 2 deletions

diff --git a/rosalind/str.rs b/rosalind/str.rs
index 7837055..c96024a 100644
--- a/rosalind/str.rs
+++ b/rosalind/str.rs
@@ -2,8 +2,7 @@ use str = core::str;
 
 /* really feels like there should be a more efficient way to do this */
 fn reverse(s: &str) -> ~str {
-    let mut r = ~"";
-    str::reserve(&mut r, str::len(s));
+    let mut r = str::with_capacity(str::len(s));
     for str::each_char(s) |ch| {
         str::unshift_char(&mut r, ch)
     }