fix samples

Author: sajeetharan

articles/cosmos-db/hierarchical-partition-keys.md

@@ -134,7 +134,9 @@ Container container = await database.CreateContainerIfNotExistsAsync(containerPr
 
 #### [Java SDK v4](#tab/java-v4)
 
-```java
+#### [JavaScript SDK v4](#tab/javascript-v4)
+
+```javascript
 // List of partition keys, in hierarchical order. You can have up to three levels of keys.
 List<String> subpartitionKeyPaths = new ArrayList<String>();
 subpartitionKeyPaths.add("/TenantId");
@@ -250,22 +252,26 @@ UserSession item = new UserSession()
 ItemResponse<UserSession> createResponse = await container.CreateItemAsync(item);
 ```
 
-##### [Java SDK v4](#tab/java-v4)
+##### [Javascript SDK v4](#tab/javascript-v4)
+
+```javascript
+ // Create a new item
+const item: UserSession = {
+    Id: 'f7da01b0-090b-41d2-8416-dacae09fbb4a',
+    TenantId: 'Microsoft',
+    UserId: '8411f20f-be3e-416a-a3e7-dcd5a3c1f28b',
+    SessionId: '0000-11-0000-1111'
+}
 
-```java
-// Create a new item
-UserSession item = new UserSession();
-item.setId("f7da01b0-090b-41d2-8416-dacae09fbb4a");
-item.setTenantId("Microsoft");
-item.setUserId("8411f20f-be3e-416a-a3e7-dcd5a3c1f28b");
-item.setSessionId("0000-11-0000-1111");
-   
 // Pass in the object, and the SDK automatically extracts the full partition key path
-Mono<CosmosItemResponse<UserSession>> createResponse = container.createItem(item);
+const { resource: document } = await = container.items.create(item);
+
 ```
 
 ---
 
+// Pass in the object, and the SDK automatically extracts the full partition key path
+const { resource: document } = await = container.items.create(it
 #### Manually specify the path
 
 The `PartitionKeyBuilder` class in the SDK can construct a value for a previously defined hierarchical partition key path. Use this class when you add a new item to a container that has subpartitioning enabled.
@@ -319,6 +325,28 @@ Mono<CosmosItemResponse<UserSession>> createResponse = container.createItem(item
 
 ---
 
+##### [Javascript SDK v4](#tab/javascript-v4)
+
+```javascript
+const item: UserSession = {
+    Id: 'f7da01b0-090b-41d2-8416-dacae09fbb4a',
+    TenantId: 'Microsoft',
+    UserId: '8411f20f-be3e-416a-a3e7-dcd5a3c1f28b',
+    SessionId: '0000-11-0000-1111'
+}
+
+// Specify the full partition key path when creating the item
+const partitionKey: PartitionKey = new PartitionKeyBuilder()
+    .addValue(item.TenantId)
+    .addValue(item.UserId)
+    .addValue(item.SessionId)
+    .build();
+
+// Create the item in the container
+const { resource: document } = await container.items.create(item, partitionKey);
+
+---
+
 ### Perform a key/value lookup (point read) of an item
 
 Key/value lookups (point reads) are performed in a way that's similar to a non-subpartitioned container. For example, assume you have a hierarchical partition key that consists of `TenantId` > `UserId` > `SessionId`. The unique identifier for the item is a GUID. It's represented as a string that serves as a unique document transaction identifier. To perform a point read on a single item, pass in the `id` property of the item and the full value for the partition key, including all three components of the path.
@@ -359,26 +387,22 @@ PartitionKey partitionKey = new PartitionKeyBuilder()
 // Perform a point read
 Mono<CosmosItemResponse<UserSession>> readResponse = container.readItem(id, partitionKey, UserSession.class);
 ```
-
----
-
-##### [JavaScript SDK v4](#tab/javascript-v4)
+##### [Javascript SDK v4](#tab/javascript-v4)
 
 ```javascript
 // Store the unique identifier
-String id = "f7da01b0-090b-41d2-8416-dacae09fbb4a"; 
+const id = "f7da01b0-090b-41d2-8416-dacae09fbb4a";
 
 // Build the full partition key path
-PartitionKey partitionKey = new PartitionKeyBuilder()
-    .add("Microsoft") //TenantId
-    .add("8411f20f-be3e-416a-a3e7-dcd5a3c1f28b") //UserId
-    .add("0000-11-0000-1111") //SessionId
+const partitionKey: PartitionKey = new PartitionKeyBuilder()
+    .addValue(item.TenantId)
+    .addValue(item.UserId)
+    .addValue(item.SessionId)
     .build();
-    
+
 // Perform a point read
-Mono<CosmosItemResponse<UserSession>> readResponse = container.readItem(id, partitionKey, UserSession.class);
+const { resource: document } = await container.item(id, partitionKey).read();
 ```
-
 ---
 
 ### Run a query
@@ -446,6 +470,20 @@ pagedResponse.byPage().flatMap(fluxResponse -> {
     return Flux.empty();
 }).blockLast();
 ```
+##### [Javascript SDK v4](#tab/javascript-v4)
+
+```javascript
+// Define a single-partition query that specifies the full partition key path
+const query: string = "SELECT * FROM c WHERE c.TenantId = 'Microsoft' AND c.UserId = '8411f20f-be3e-416a-a3e7-dcd5a3c1f28b' AND c.SessionId = '0000-11-0000-1111'";
+
+// Retrieve an iterator for the result set
+const queryIterator = container.items.query(query);
+
+while (queryIterator.hasMoreResults()) {
+    const { resources: results } = await queryIterator.fetchNext();
+    // Process result
+}
+```
 
 ---
 
@@ -495,6 +533,20 @@ pagedResponse.byPage().flatMap(fluxResponse -> {
 }).blockLast();
 ```
 
+##### [Javascript SDK v4](#tab/javascript-v4)
+
+```javascript
+// Define a targeted cross-partition query specifying prefix path[s]
+const query: string = "SELECT * FROM c WHERE c.TenantId = 'Microsoft'";
+
+// Retrieve an iterator for the result set
+const queryIterator = container.items.query(query);
+
+while (queryIterator.hasMoreResults()) {
+    const { resources: results } = await queryIterator.fetchNext();
+    // Process result
+}
+```
 ---
 
 ## Limitations and known issues

articles/cosmos-db/nosql/change-feed-pull-model.md

@@ -310,7 +310,7 @@ Here's an example of how to obtain the iterator in latest version mode that retu
 
 ```js
 const options = {
-    changeFeedStartFrom: ChangeFeedStartFrom.Beginning()
+    changeFeedStartFrom: ChangeFeedStartFrom.Now()
 };
 
 const iterator = container.items.getChangeFeedIterator(options);