Added a few more extension methods on vectors, and fixed a pretty printer bug.

src/libcore/vec.rs

@@ -580,6 +580,16 @@ fn all<T>(v: [T], f: fn(T) -> bool) -> bool {
     ret true;
 }
 
+#[doc = "
+Return true if a predicate matches all elements
+
+If the vector contains no elements then true is returned.
+"]
+fn alli<T>(v: [T], f: fn(uint, T) -> bool) -> bool {
+    for eachi(v) {|i, elem| if !f(i, elem) { ret false; } }
+    ret true;
+}
+
 #[doc = "
 Return true if a predicate matches all elements in both vectors.
 
@@ -1107,6 +1117,12 @@ impl extensions<T> for [T] {
         let mut i = 0u;
         self.map { |e| i += 1u; f(i - 1u, e) }
     }
+    #[doc = "Returns true if the function returns true for all elements.
+
+    If the vector is empty, true is returned."]
+    fn alli(f: fn(uint, T) -> bool) -> bool {
+        alli(self, f)
+    }
     #[doc = "
     Apply a function to each element of a vector and return a concatenation
     of each result vector