Fix infinite callbacks in Azure Resource Explorer (#3780)

extensions/azurecore/src/azureResource/utils.ts

@@ -40,4 +40,57 @@ export function generateGuid(): string {
     let clockSequenceHi: string = hexValues[8 + (Math.random() * 4) | 0];
     return oct.substr(0, 8) + '-' + oct.substr(9, 4) + '-4' + oct.substr(13, 3) + '-' + clockSequenceHi + oct.substr(16, 3) + '-' + oct.substr(19, 12);
     /* tslint:enable:no-bitwise */
+}
+
+export function equals(one: any, other: any): boolean {
+    if (one === other) {
+        return true;
+    }
+    if (one === null || one === undefined || other === null || other === undefined) {
+        return false;
+    }
+    if (typeof one !== typeof other) {
+        return false;
+    }
+    if (typeof one !== 'object') {
+        return false;
+    }
+    if ((Array.isArray(one)) !== (Array.isArray(other))) {
+        return false;
+    }
+
+    let i: number;
+    let key: string;
+
+    if (Array.isArray(one)) {
+        if (one.length !== other.length) {
+            return false;
+        }
+        for (i = 0; i < one.length; i++) {
+            if (!equals(one[i], other[i])) {
+                return false;
+            }
+        }
+    } else {
+        const oneKeys: string[] = [];
+
+        for (key in one) {
+            oneKeys.push(key);
+        }
+        oneKeys.sort();
+        const otherKeys: string[] = [];
+        for (key in other) {
+            otherKeys.push(key);
+        }
+        otherKeys.sort();
+        if (!equals(oneKeys, otherKeys)) {
+            return false;
+        }
+        for (i = 0; i < oneKeys.length; i++) {
+            if (!equals(one[oneKeys[i]], other[oneKeys[i]])) {
+                return false;
+            }
+        }
+    }
+    return true;
 }