new valuesAt and extract functions

ljharb · Aug 27, 2010 · 883f015 · 883f015
1 parent 094ab55
commit 883f015
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/lib/hash.js b/lib/hash.js
@@ -50,11 +50,21 @@ function Hash (hash, extra) {
         merge : function (h) {
             return self.copy.update(h);
         },
+        valuesAt : function (keys) {
+            return keys.map(function (key) { return hash[key] });
+        },
         tap : function (f) {
             f.call(self, hash);
             memoized = {};
             return self;
         },
+        extract : function (keys) {
+            var acc = {};
+            keys.forEach(function (key) {
+                acc[key] = hash[key];
+            });
+            return Hash(acc);
+        },
         end : hash,
         items : hash
     };