From 3a7a2943ddd1e7e91f625d6459c3e0636ca129cb Mon Sep 17 00:00:00 2001
From: Jesse Ruderman <jruderman@gmail.com>
Date: Fri, 23 Sep 2011 19:10:48 -0700
Subject: Add vec::filter

---
 src/lib/vec.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/lib')

diff --git a/src/lib/vec.rs b/src/lib/vec.rs
index 6ca0c9bb61e..fef91259b50 100644
--- a/src/lib/vec.rs
+++ b/src/lib/vec.rs
@@ -213,6 +213,17 @@ fn filter_map<@T, @U>(f: block(T) -> option::t<U>, v: [mutable? T]) -> [U] {
     ret result;
 }
 
+fn filter<@T>(f: block(T) -> bool, v: [mutable? T]) -> [T] {
+    let result = [];
+    for elem: T in v {
+        let elem2 = elem; // satisfies alias checker
+        if f(elem2) {
+            result += [elem2];
+        }
+    }
+    ret result;
+}
+
 fn foldl<@T, @U>(p: block(U, T) -> U, z: U, v: [mutable? T]) -> U {
     let sz = len(v);
     if sz == 0u { ret z; }
-- 
cgit 1.4.1-3-g733a5