Set array value types.

## Explore further


For detailed documentation that includes this code sample, see the following:

- [Datastore queries](https://docs.cloud.google.com/datastore/docs/concepts/queries)
- [Entities, Properties, and Keys](https://docs.cloud.google.com/datastore/docs/concepts/entities)

## Code sample

### C#


To learn how to install and use the client library for Datastore mode, see
[Datastore mode client libraries](https://docs.cloud.google.com/datastore/docs/reference/libraries).


For more information, see the
[Datastore mode C# API
reference documentation](https://cloud.google.com/dotnet/docs/reference/Google.Cloud.Datastore.V1/latest).


To authenticate to Datastore mode, set up Application Default Credentials.
For more information, see

[Set up authentication for a local development environment](https://docs.cloud.google.com/docs/authentication/set-up-adc-local-dev-environment).

    Entity task = new Entity()
    {
        Key = _db.CreateKeyFactory("Task").CreateKey("sampleTask"),
        ["collaborators"] = new ArrayValue() { Values = { "alice", "bob" } },
        ["tags"] = new ArrayValue() { Values = { "fun", "programming" } }
    };

### Go


To learn how to install and use the client library for Datastore mode, see
[Datastore mode client libraries](https://docs.cloud.google.com/datastore/docs/reference/libraries).


For more information, see the
[Datastore mode Go API
reference documentation](https://cloud.google.com/go/docs/reference/cloud.google.com/go/datastore/latest).


To authenticate to Datastore mode, set up Application Default Credentials.
For more information, see

[Set up authentication for a local development environment](https://docs.cloud.google.com/docs/authentication/set-up-adc-local-dev-environment).

    type Task struct {
    	Tags          []string
    	Collaborators []string
    }
    task := &Task{
    	Tags:          []string{"fun", "programming"},
    	Collaborators: []string{"alice", "bob"},
    }

### Java


To learn how to install and use the client library for Datastore mode, see
[Datastore mode client libraries](https://docs.cloud.google.com/datastore/docs/reference/libraries).


For more information, see the
[Datastore mode Java API
reference documentation](https://cloud.google.com/java/docs/reference/google-cloud-datastore/latest/history).


To authenticate to Datastore mode, set up Application Default Credentials.
For more information, see

[Set up authentication for a local development environment](https://docs.cloud.google.com/docs/authentication/set-up-adc-local-dev-environment).

    Entity task =
        Entity.newBuilder(taskKey)
            .set("tags", "fun", "programming")
            .set("collaborators", ListValue.of("alice", "bob"))
            .build();

### PHP


To learn how to install and use the client library for Datastore mode, see
[Datastore mode client libraries](https://docs.cloud.google.com/datastore/docs/reference/libraries).


For more information, see the
[Datastore mode PHP API
reference documentation](https://googleapis.github.io/google-cloud-php/#/docs/cloud-datastore/latest).


To authenticate to Datastore mode, set up Application Default Credentials.
For more information, see

[Set up authentication for a local development environment](https://docs.cloud.google.com/docs/authentication/set-up-adc-local-dev-environment).

    $task = $datastore->entity(
        $key,
        [
            'tags' => ['fun', 'programming'],
            'collaborators' => ['alice', 'bob']
        ]
    );

### Python


To learn how to install and use the client library for Datastore mode, see
[Datastore mode client libraries](https://docs.cloud.google.com/datastore/docs/reference/libraries).


For more information, see the
[Datastore mode Python API
reference documentation](https://cloud.google.com/python/docs/reference/datastore/latest).


To authenticate to Datastore mode, set up Application Default Credentials.
For more information, see

[Set up authentication for a local development environment](https://docs.cloud.google.com/docs/authentication/set-up-adc-local-dev-environment).

    from google.cloud import https://docs.cloud.google.com/python/docs/reference/datastore/latest

    # For help authenticating your client, visit
    # https://cloud.google.com/docs/authentication/getting-started
    client = https://docs.cloud.google.com/python/docs/reference/datastore/latest.https://docs.cloud.google.com/python/docs/reference/datastore/latest/google.cloud.datastore.client.Client.html()

    key = client.https://docs.cloud.google.com/python/docs/reference/datastore/latest/google.cloud.datastore.client.Client.html#google_cloud_datastore_client_Client_key("Task")
    task = https://docs.cloud.google.com/python/docs/reference/datastore/latest.https://docs.cloud.google.com/python/docs/reference/datastore/latest/google.cloud.datastore.entity.Entity.html(key)
    task.update({"tags": ["fun", "programming"], "collaborators": ["alice", "bob"]})

### Ruby


To learn how to install and use the client library for Datastore mode, see
[Datastore mode client libraries](https://docs.cloud.google.com/datastore/docs/reference/libraries).


For more information, see the
[Datastore mode Ruby API
reference documentation](https://docs.cloud.google.com/ruby/docs/reference/google-cloud-datastore/latest).


To authenticate to Datastore mode, set up Application Default Credentials.
For more information, see

[Set up authentication for a local development environment](https://docs.cloud.google.com/docs/authentication/set-up-adc-local-dev-environment).

    # task_name = "sampleTask"
    task = datastore.entity "Task", task_name do |t|
      t["tags"] = ["fun", "programming"]
      t["collaborators"] = ["alice", "bob"]
    end

## What's next


To search and filter code samples for other Google Cloud products, see the
[Google Cloud sample browser](https://docs.cloud.google.com/docs/samples?product=datastore).