From 752f64f66da9fb424a4f78fc2d4ad0ef096ba65d Mon Sep 17 00:00:00 2001
From: James Halliday <substack@gmail.com>
Date: Fri, 19 Nov 2010 14:46:11 +0000
Subject: [PATCH] exclude to remove keys

---
 lib/hash.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/hash.js b/lib/hash.js
index 5bd7512..ed2b8be 100644
--- a/lib/hash.js
+++ b/lib/hash.js
@@ -89,6 +89,11 @@ function Hash (hash, xs) {
             });
             return Hash(acc);
         },
+        exclude : function (keys) {
+            return self.filter(function (_, key) {
+                return keys.indexOf(key) < 0
+            });
+        },
         end : hash,
         items : hash
     };
@@ -189,6 +194,10 @@ Hash.extract = function (ref, keys) {
     return Hash(ref).extract(keys).items;
 };
 
+Hash.exclude = function (ref, keys) {
+    return Hash(ref).exclude(keys).items;
+};
+
 Hash.concat = function (xs) {
     var hash = Hash({});
     xs.forEach(function (x) { hash.update(x) });