From d5f4c1bb0dc3a9ff8845d209c75d00cc733b3360 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Aleksander=20=C5=81ukasz?=
 <aleksander.lukasz@nowoczesnapolska.org.pl>
Date: Tue, 21 Jan 2014 11:04:31 +0100
Subject: [PATCH] wlxml: metadata - additional iterator, filtering

---
 src/wlxml/extensions/metadata/metadata.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/wlxml/extensions/metadata/metadata.js b/src/wlxml/extensions/metadata/metadata.js
index b30b94c..b19cd52 100644
--- a/src/wlxml/extensions/metadata/metadata.js
+++ b/src/wlxml/extensions/metadata/metadata.js
@@ -90,8 +90,16 @@ _.extend(Metadata.prototype, {
         }
     }),
 
-    forEach: function(callback) {
-        return this._rows.forEach(callback);
+    _iter: function(method, callback, key) {
+        return this._rows
+            .filter(function(row) { return !key || row.getKey() === key; })
+            [method](function(row) { return callback(row); });
+    },
+    forEach: function(callback, key) {
+        return this._iter('forEach', callback, key);
+    },
+    some: function(callback, key) {
+        return this._iter('some', callback, key);
     },
     add: function(rowDesc, options) {
         var row;
-- 
2.20.1