feat(ngRepeat): add support for custom tracking of items

BREAKING CHANGE:

It is considered an error to have two items produce
the same track by key. (This was tolerated before.)

1 files changed, 0 insertions, 44 deletions

diff --git a/src/apis.js b/src/apis.js
index 0e94e2a5..c5d2b3d3 100644
--- a/src/apis.js
+++ b/src/apis.js
@@ -65,47 +65,3 @@ HashMap.prototype = {
     return value;
   }
 };
-
-/**
- * A map where multiple values can be added to the same key such that they form a queue.
- * @returns {HashQueueMap}
- */
-function HashQueueMap() {}
-HashQueueMap.prototype = {
-  /**
-   * Same as array push, but using an array as the value for the hash
-   */
-  push: function(key, value) {
-    var array = this[key = hashKey(key)];
-    if (!array) {
-      this[key] = [value];
-    } else {
-      array.push(value);
-    }
-  },
-
-  /**
-   * Same as array shift, but using an array as the value for the hash
-   */
-  shift: function(key) {
-    var array = this[key = hashKey(key)];
-    if (array) {
-      if (array.length == 1) {
-        delete this[key];
-        return array[0];
-      } else {
-        return array.shift();
-      }
-    }
-  },
-
-  /**
-   * return the first item without deleting it
-   */
-  peek: function(key) {
-    var array = this[hashKey(key)];
-    if (array) {
-    return array[0];
-    }
-  }
-};