ui

app/code/node_modules/collect.js/dist/methods/countBy.js

@@ -0,0 +1,11 @@
+'use strict';
+
+module.exports = function countBy() {
+  var fn = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : function (value) {
+    return value;
+  };
+
+  return new this.constructor(this.items).groupBy(fn).map(function (value) {
+    return value.count();
+  });
+};