Replace Array::map call with a list comprehension and remove the polypill.

@@ -12,30 +12,6 @@
     };
   }
 
-  if (!Array.prototype.map) {
-    Array.prototype.map = function(callback) {
-      var A, O, T, k, len;
-      if (this === null) {
-        throw new TypeError("Can't convert " + this + " to object");
-      }
-      O = Object(this);
-      len = O.length >>> 0;
-      if (typeof callback !== 'function') {
-        throw new TypeError("" + callback + " is not a function");
-      }
-      T = arguments[1];
-      A = new Array(len);
-      k = 0;
-      while (k < len) {
-        if (k in O) {
-          A[k] = callbackfn.call(T, O[k], k, O);
-        }
-        k++;
-      }
-      return A;
-    };
-  }
-
   Rivets.Binding = (function() {
 
     function Binding(el, type, model, keypath, formatters) {
@@ -113,7 +89,7 @@
     };
 
     View.prototype.build = function() {
-      var attribute, bindingRegExp, keypath, model, node, path, pipes, type, _i, _len, _ref, _results;
+      var attribute, bindingRegExp, keypath, model, node, path, pipe, pipes, type, _i, _len, _ref, _results;
       this.bindings = [];
       bindingRegExp = this.bindingRegExp();
       _ref = this.el.getElementsByTagName('*');
@@ -128,9 +104,16 @@
             attribute = _ref1[_j];
             if (bindingRegExp.test(attribute.name)) {
               type = attribute.name.replace(bindingRegExp, '');
-              pipes = attribute.value.split('|').map(function(pipe) {
-                return pipe.trim();
-              });
+              pipes = (function() {
+                var _k, _len2, _ref2, _results2;
+                _ref2 = attribute.value.split('|');
+                _results2 = [];
+                for (_k = 0, _len2 = _ref2.length; _k < _len2; _k++) {
+                  pipe = _ref2[_k];
+                  _results2.push(pipe.trim());
+                }
+                return _results2;
+              })();
               path = pipes.shift().split('.');
               model = this.models[path.shift()];
               keypath = path.join('.');

@@ -9,26 +9,6 @@ Rivets = {}
 # Polyfill For String::trim.
 unless String::trim then String::trim = -> @replace /^\s+|\s+$/g, ""
 
-# Polyfill For Array::map
-unless Array::map
-  Array::map = (callback) ->
-    if this is null
-      throw new TypeError "Can't convert #{this} to object"
-    O = Object(this)
-    len = O.length >>> 0
-
-    throw new TypeError "#{callback} is not a function" unless typeof callback is 'function'
-
-    T = arguments[1]
-    A = new Array(len)
-    k = 0;
-
-    while k < len
-      A[k] = callbackfn.call(T, O[k], k, O)  if k of O
-      k++
-
-    return A
-
 # A single binding between a model attribute and a DOM element.
 class Rivets.Binding
   # All information about the binding is passed into the constructor; the DOM
@@ -88,7 +68,7 @@ class Rivets.View
       for attribute in node.attributes
         if bindingRegExp.test attribute.name
           type = attribute.name.replace bindingRegExp, ''
-          pipes = attribute.value.split('|').map (pipe) -> pipe.trim()
+          pipes = (pipe.trim() for pipe in attribute.value.split '|')
           path = pipes.shift().split '.'
           model = @models[path.shift()]
           keypath = path.join '.'