# \$1setEquals
<a name="setEquals"></a>

The `$setEquals` operator in Amazon DocumentDB is used to determine if two sets are equal. It compares two arrays and returns `true` if they contain the same distinct elements, regardless of their order.

**Parameters**
+ `expression1`: The first array to compare.
+ `expression2`: The second array to compare.

## Example (MongoDB Shell)
<a name="setEquals-examples"></a>

The following example demonstrates the usage of the `$setEquals` operator to compare two sets of values.

**Create sample documents**

```
db.collection.insertMany([
  { _id: 1, fruits: ["apple", "banana", "cherry"] },
  { _id: 2, fruits: ["banana", "apple", "cherry"] },
  { _id: 3, fruits: ["apple", "banana", "orange"] }
])
```

**Query example**

```
db.collection.find({
  $expr: {
    $setEquals: ["$fruits", ["apple", "banana", "cherry"]]
  }
})
```

**Output**

```
{ "_id" : 1, "fruits" : [ "apple", "banana", "cherry" ] }
{ "_id" : 2, "fruits" : [ "banana", "apple", "cherry" ] }
```

The query uses the `$setEquals` operator to compare the `fruits` field of each document with the array `[&quot;apple&quot;, &quot;banana&quot;, &quot;cherry&quot;]`. The documents where the `fruits` field is equal to the comparison array are returned.

## Code examples
<a name="setEquals-code"></a>

To view a code example for using the `$setEquals` command, choose the tab for the language that you want to use:

------
#### [ Node.js ]

```
const { MongoClient } = require('mongodb');

async function example() {
  const client = await MongoClient.connect('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false');
  const db = client.db('test');
  const collection = db.collection('mycollection');

  // Insert sample documents
  await collection.insertMany([
    { _id: 1, fruits: ["apple", "banana", "cherry"] },
    { _id: 2, fruits: ["banana", "apple", "cherry"] },
    { _id: 3, fruits: ["apple", "banana", "orange"] }
  ]);

  // Query using $setEquals
  const result = await collection.find({
    $expr: {
      $setEquals: ["$fruits", ["apple", "banana", "cherry"]]
    }
  }).toArray();

  console.log(result);
  await client.close();
}

example();
```

------
#### [ Python ]

```
from pymongo import MongoClient

def example():
    client = MongoClient('mongodb://<username>:<password>@<cluster-endpoint>:27017/?tls=true&tlsCAFile=global-bundle.pem&replicaSet=rs0&readPreference=secondaryPreferred&retryWrites=false')
    db = client['test']
    collection = db['mycollection']

    # Insert sample documents
    collection.insert_many([
        {"_id": 1, "fruits": ["apple", "banana", "cherry"]},
        {"_id": 2, "fruits": ["banana", "apple", "cherry"]},
        {"_id": 3, "fruits": ["apple", "banana", "orange"]}
    ])

    # Query using $setEquals
    result = list(collection.find({
        "$expr": {
            "$setEquals": ["$fruits", ["apple", "banana", "cherry"]]
        }
    }))

    print(result)
    client.close()

example()
```

------