1 files changed, 51 insertions, 0 deletions
diff --git a/js/utility/Iterators.js b/js/utility/Iterators.js
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+++ b/js/utility/Iterators.js
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+/**
+ * ownCloud - News
+ *
+ * This file is licensed under the Affero General Public License version 3 or
+ * later. See the COPYING file.
+ *
+ * @author Bernhard Posselt <dev@bernhard-posselt.com>
+ * @copyright Bernhard Posselt 2014
+ */
+
+const call = Function.prototype.call.bind(Function.prototype.call);
+const hasOwn = Object.prototype.hasOwnProperty;
+
+/**
+ * From http://wiki.ecmascript.org/doku.php?id=harmony:iterators#standard_api
+ * Allows to iterate over objects
+ * like: for (let [key, value] of objects)
+ */
+window.items = function (obj) {
+    'use strict';
+
+    return {
+        [Symbol.iterator]: function () {
+            return (function*() {
+                for (let x in obj) {
+                    if (call(hasOwn, obj, x))
+                        yield [x, obj[x]];
+                }
+            })();
+        }
+    };
+};
+
+/**
+ * Iterates over a list and returns the item and index
+ * like: for (let [index, value] of enumerate(list))
+ * Similar to Pythons enumerate() iterator function
+ */
+window.enumerate = function (list) {
+    'use strict';
+
+    return {
+        [Symbol.iterator]: function () {
+            return (function*() {
+                for (let counter = 0; counter < list.length; counter += 1) {
+                    yield [counter, list[counter]];
+                }
+            })();
+        }
+    };
+};
+\ No newline at end of file