From 4719cc03837490ed4bf1b9725d75a686e56e5a6a Mon Sep 17 00:00:00 2001
From: claw0ry <me@claw0ry.net>
Date: Wed, 11 Dec 2024 13:56:52 +0100
Subject: fresh start

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+---
+title: "Get Array of Unique Objects in Servicenow"
+description: "How to get only unique objects from an array of objects in ServiceNow"
+date: 2024-06-14T12:29:18+02:00
+tags: ['servicenow', 'javascript']
+---
+
+There's no secret that the Javascript support (serverside) in ServiecNow is lacking. And today I came across another little quirk. In ServiceNow we have the `ArrayUtil.unique()` to get an Array of unique values, but this does not support objects. Neither does ServiceNow support `Map()` or `Set()` on the serverside, so here's a little snippet to filter an array of objects and receive unique objects based on a object `key`.
+
+<!--more-->
+
+```javascript
+/**
+ * Get unique objects from an array of object, by key.
+ *
+ * @param {Array.<Object>} arr - The array of objects
+ * @param {string} key - The object key that must be unique
+ * @returns {Array.<Object>} An array of unique objects
+ */
+function uniqueObjects(arr, key) {
+    return arr.filter(function(value, index, self) {
+        return self.map(function(x) {
+            return x[key];
+        }).indexOf(value[key]) == index;
+    });
+}
+```
+
+Here's a example from a fresh developer instance.
+
+```javascript
+var managers = [];
+var gr = new GlideRecord('sys_user');
+gr.addActiveQuery();
+gr.addNotNullQuery('manager');
+gr.query();
+
+while(gr.next()) {
+    var managerId = gr.getValue('manager');
+    var managerUsername = gr.manager.user_name.getValue();
+    managers.push({
+        userId: managerId,
+        username: managerUsername,
+    });
+}
+
+var uniqueManagers = uniqueObjects(managers, 'userId');
+
+gs.print(managers.length);
+gs.print(uniqueManagers.length);
+
+// ---------- OUTPUT ----------
+// *** Script: 13
+// *** Script: 11
+```
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