ui

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

@@ -0,0 +1,34 @@
+'use strict';
+
+var _require = require('../helpers/is'),
+    isFunction = _require.isFunction;
+
+module.exports = function unique(key) {
+  var collection = void 0;
+
+  if (key === undefined) {
+    collection = this.items.filter(function (element, index, self) {
+      return self.indexOf(element) === index;
+    });
+  } else {
+    collection = [];
+
+    var usedKeys = [];
+
+    for (var iterator = 0, length = this.items.length; iterator < length; iterator += 1) {
+      var uniqueKey = void 0;
+      if (isFunction(key)) {
+        uniqueKey = key(this.items[iterator]);
+      } else {
+        uniqueKey = this.items[iterator][key];
+      }
+
+      if (usedKeys.indexOf(uniqueKey) === -1) {
+        collection.push(this.items[iterator]);
+        usedKeys.push(uniqueKey);
+      }
+    }
+  }
+
+  return new this.constructor(collection);
+};