Added map-reduce and find methods to list

lib/list.js

@@ -115,12 +115,24 @@ if (_) {
     });
 }
 
-['slice', 'forEach', 'filter'].forEach(function (method) {
+['slice', 'forEach', 'filter', 'reduce', 'map'].forEach(function (method) {
     var slice = [].slice;
     List.prototype[method] = function () {
         return Array.prototype[method].apply(this.items, slice.call(arguments));
     };
-});;
+});
+
+List.prototype.find = function(pattern, field) {
+    if (field) {
+        var res;
+        this.items.forEach(function(o) {
+            if (o[field] == pattern) res = o;
+        });
+        return res;
+    } else {
+        return this.items[this.items.indexOf(pattern)];
+    }
+};
 
 List.prototype.toObject = function() {
     return this.items;