feat(): filter example

Author: marcin-wosinek

src/filter.js

@@ -0,0 +1,16 @@
+'use strict';
+
+/**
+ * @ngdoc filter
+ * @name rfx.filter:checkmark
+ * @function
+ * @description
+ * # checkmark
+ * Filter that returns ✓ for true; and ✘ for false input.
+ */
+angular.module('rfx')
+  .filter('checkmark', function () {
+    return function(input) {
+      return input ? '\u2713' : '\u2718';
+    };
+  });