Added method map to Collection interface and all its implementations (except classes generated fr...

frog/utils.dart

Index: frog/utils.dart
===================================================================
--- frog/utils.dart	(revision 2973)
+++ frog/utils.dart	(working copy)
@@ -122,6 +122,9 @@
 
   Iterator<E> iterator() => new FixedIterator<E>(value, length);
   void forEach(void f(E element)) { Collections.forEach(this, f); }
+  Collection map(f(E element)) {

[sra1, 2012/01/05 22:46:49]

nit: prefer =>, especially if it fits on one line.

+    return Collections.map(this, new List(), f);
+  }
   Collection<E> filter(bool f(E element)) {
     return Collections.filter(this, new List<E>(), f);
   }