fix(collection): new Set(iterable) is not supported (IE11, Safari)

marclaval · marclaval · commit d1355bfeecd9 · 2015-05-21T18:45:29.000+02:00
diff --git a/modules/angular2/src/facade/collection.ts b/modules/angular2/src/facade/collection.ts
@@ -234,6 +234,16 @@ export function iterateListLike(obj, fn: Function) {
 }
 
 export class SetWrapper {
-  static createFromList<T>(lst: List<T>): Set<T> { return new Set(lst); }
+  // Safari and Internet Explorer do not support the iterable parameter to the
+  // Set constructor.  We work around that by manually adding the items.
+  static createFromList<T>(lst: List<T>): Set<T> { 
+    var res = new Set(lst);
+    if (res.size !== lst.length) {
+      for (var i = 0; i < lst.length; i++) {
+        res.add(lst[i]);
+      }
+    }
+    return res;
+  }
   static has<T>(s: Set<T>, key: T): boolean { return s.has(key); }
 }
