ronantakizawa/codereview-bench huggingface dataset:
Repository: DiceDB/dice
File: internal/eval/eval.go (Go)

Code before:
// evalHEXISTS returns if field is an existing field in the hash stored at key.
//
// This command returns 0, if the specified field doesn't exist in the key and 1 if it exists.
//
// If key doesn't exist, it returns 0.
//
// Usage: HEXISTS key field
func evalHEXISTS(args []string, store *dstore.Store) []byte {
	if len(args) != 2 {
		return diceerrors.NewErrArity("HEXISTS")
	}

	key := args[0]
	hmKey := args[1]
	obj := store.Get(key)

	var hashMap HashMap

	if obj != nil {
		if err := object.AssertTypeAndEncoding(obj.TypeEncoding, object.ObjTypeHashMap, object.ObjEncodingHashMap); err != nil {
			return diceerrors.NewErrWithMessage(diceerrors.WrongTypeErr)
		}
		hashMap = obj.Value.(HashMap)
	} else {
		return clientio.Encode(0, false)
	}

	_, ok := hashMap.Get(hmKey)
	if ok {
		return clientio.Encode(1, false)
	}
	// Return 0, if specified field doesn't exist in the HashMap.
	return clientio.Encode(0, false)
}

func evalObjectIdleTime(key string, store *dstore.Store) []byte {
	obj := store.GetNoTouch(key)
	if obj == nil {
		return clientio.RespNIL
	}

	return clientio.Encode(int64(dstore.GetIdleTime(obj.LastAccessedAt)), true)
}

func evalOBJECT(args []string, store *dstore.Store) []byte {
	if len(args) < 2 {
		return diceerrors.NewErrArity("OBJECT")
	}

	subcommand := strings.ToUpper(args[0])
	key := args[1]

Review comment (suggestion):
This should be structured as follows for better readability:
```go
if obj == nil {
    return Encode(0, false)
}

if err := assertType(...) {
    return err
}
```

Code after:
//
// Usage: HEXISTS key field
func evalHEXISTS(args []string, store *dstore.Store) []byte {
	if len(args) != 2 {
		return diceerrors.NewErrArity("HEXISTS")
	}

	key := args[0]
	hmKey := args[1]
	obj := store.Get(key)

	var hashMap HashMap

	if obj == nil {
		return clientio.Encode(0, false)
	}
	if err := object.AssertTypeAndEncoding(obj.TypeEncoding, object.ObjTypeHashMap, object.ObjEncodingHashMap); err != nil {
		return diceerrors.NewErrWithMessage(diceerrors.WrongTypeErr)
	}

	hashMap = obj.Value.(HashMap)

	_, ok := hashMap.Get(hmKey)
	if ok {
		return clientio.Encode(1, false)
	}
	// Return 0, if specified field doesn't exist in the HashMap.
	return clientio.Encode(0, false)
}

func evalObjectIdleTime(key string, store *dstore.Store) []byte {
	obj := store.GetNoTouch(key)
	if obj == nil {
		return clientio.RespNIL
	}

	return clientio.Encode(int64(dstore.GetIdleTime(obj.LastAccessedAt)), true)
}

func evalOBJECT(args []string, store *dstore.Store) []byte {
	if len(args) < 2 {
		return diceerrors.NewErrArity("OBJECT")
	}

	subcommand := strings.ToUpper(args[0])
	key := args[1]

	switch subcommand {
	case "IDLETIME":
		return evalObjectIdleTime(key, store)
	default:
Repository: DiceDB/dice
File: integration_tests/commands/async/hexists_test.go (Go)

Code before:
package async

import (
	"testing"

	"gotest.tools/v3/assert"
)

func TestHEXISTS(t *testing.T) {
	conn := getLocalConnection()
	defer conn.Close()
	defer FireCommand(conn, "DEL key_hExists1 key_hExists2 key_hExists3 key")

	testCases := []TestCase{
		{
			commands: []string{"HEXISTS", "HEXISTS KEY", "HEXISTS KEY FIELD ANOTHER_FIELD"},
			expected: []interface{}{"ERR wrong number of arguments for 'hexists' command",
				"ERR wrong number of arguments for 'hexists' command",
				"ERR wrong number of arguments for 'hexists' command"},
		},
		{
			commands: []string{"HSET key_hExists1 field value", "HEXISTS wrong_key_hExists field"},
			expected: []interface{}{int64(1), int64(0)},
		},
		{
			commands: []string{"HSET key_hExists2 field value", "HEXISTS key_hExists2 wrong_field"},
			expected: []interface{}{int64(1), int64(0)},
		},
		{
			commands: []string{"HSET key_hExists3 field HelloWorld", "HEXISTS key_hExists3 field"},
			expected: []interface{}{int64(1), int64(1)},
		},
		{
			commands: []string{"SET key value", "HEXISTS key field"},
			expected: []interface{}{"OK", "WRONGTYPE Operation against a key holding the wrong kind of value"},
		},
	}

	for _, tc := range testCases {

Review comment (suggestion):
Clear the keys both before and after the test for better stability

```suggestion
   FireCommand(conn, "DEL key_hExists1 key_hExists2 key_hExists3 key")
	defer FireCommand(conn, "DEL key_hExists1 key_hExists2 key_hExists3 key")
```


Code after:
package async

import (
	"testing"

	testifyAssert "github.com/stretchr/testify/assert"
)

func TestHEXISTS(t *testing.T) {
	conn := getLocalConnection()
	FireCommand(conn, "DEL key_hExists1 key_hExists2 key_hExists3 key")

	defer conn.Close()
	defer FireCommand(conn, "DEL key_hExists1 key_hExists2 key_hExists3 key")

	testCases := []TestCase{
		{
			commands: []string{"HEXISTS", "HEXISTS KEY", "HEXISTS KEY FIELD ANOTHER_FIELD"},
			expected: []interface{}{"ERR wrong number of arguments for 'hexists' command",
				"ERR wrong number of arguments for 'hexists' command",
				"ERR wrong number of arguments for 'hexists' command"},
		},
		{
			commands: []string{"HSET key_hExists1 field value", "HEXISTS wrong_key_hExists field"},
			expected: []interface{}{int64(1), int64(0)},
		},
		{
			commands: []string{"HSET key_hExists2 field value", "HEXISTS key_hExists2 wrong_field"},
			expected: []interface{}{int64(1), int64(0)},
		},
		{
			commands: []string{"HSET key_hExists3 field HelloWorld", "HEXISTS key_hExists3 field"},
			expected: []interface{}{int64(1), int64(1)},
		},
		{
			commands: []string{"SET key value", "HEXISTS key field"},
			expected: []interface{}{"OK", "WRONGTYPE Operation against a key holding the wrong kind of value"},
		},
	}
Repository: DiceDB/dice
File: integration_tests/commands/websocket/setup.go (Go)

Code before:
	}
}

type WebsocketCommand struct {
	Message string
}

func (e *WebsocketCommandExecutor) ConnectToServer() *websocket.Conn {
	// connect with Websocket Server
	conn, resp, err := websocket.DefaultDialer.Dial(url, nil)
	if err != nil {
		return nil
	}
	if resp != nil {
		resp.Body.Close()
	}
	return conn
}

func (e *WebsocketCommandExecutor) FireCommand(conn *websocket.Conn, cmd WebsocketCommand) (interface{}, error) {
	command := []byte(cmd.Message)

	// send request
	err := conn.WriteMessage(websocket.TextMessage, command)
	if err != nil {
		return nil, fmt.Errorf("error sending websocket request: %v", err)
	}

	// read the response
	_, resp, err := conn.ReadMessage()
	if err != nil {
		return nil, fmt.Errorf("error reading websocket response: %v", err)
	}

	// marshal to json
	var respJSON interface{}
	if err = json.Unmarshal(resp, &respJSON); err != nil {
		return nil, fmt.Errorf("error unmarshalling response: %v", err)
	}

	return respJSON, nil
}

func (e *WebsocketCommandExecutor) DisconnectServer(conn *websocket.Conn) {
	conn.Close()
}

func (e *WebsocketCommandExecutor) Name() string {
	return "Websocket"
}


Review comment (suggestion):
I believe we should retain this and test explicitly for error/negative cases. May be we can add in another PR but we should test explicitly invoked error scenarios.

Code after:
}

func (e *WebsocketCommandExecutor) ConnectToServer() *websocket.Conn {
	// connect with Websocket Server
	conn, resp, err := websocket.DefaultDialer.Dial(url, nil)
	if err != nil {
		return nil
	}
	if resp != nil {
		resp.Body.Close()
	}
	return conn
}

func (e *WebsocketCommandExecutor) FireCommand(conn *websocket.Conn, cmd string) interface{} {
	command := []byte(cmd)

	// send request
	err := conn.WriteMessage(websocket.TextMessage, command)
	if err != nil {
		return nil
	}

	// read the response
	_, resp, err := conn.ReadMessage()
	if err != nil {
		return nil
	}

	// marshal to json
	var respJSON interface{}
	if err = json.Unmarshal(resp, &respJSON); err != nil {
		return nil
	}

	return respJSON
}

func (e *WebsocketCommandExecutor) DisconnectServer(conn *websocket.Conn) {
	conn.Close()
}

func (e *WebsocketCommandExecutor) Name() string {
	return "Websocket"
}

func RunWebsocketServer(ctx context.Context, wg *sync.WaitGroup, opt TestServerOptions) {
	config.DiceConfig.Network.IOBufferLength = 16
	config.DiceConfig.Server.WriteAOFOnCleanup = false

	// Initialize the WebsocketServer
Repository: DiceDB/dice
File: integration_tests/commands/http/command_count_test.go (Go)

Code before:
package http

import (
	"fmt"
	"testing"

	"gotest.tools/v3/assert"
)

func TestCommandCount(t *testing.T) {
	exec := NewHTTPCommandExecutor()
	t.Run("Command count should be positive", func(t *testing.T) {
		commandCount := getCommandCount(exec)
		assert.Assert(t, commandCount > 0,
			fmt.Sprintf("Unexpected number of CLI commands found. expected greater than 0, %f found", commandCount))
	})
}

func getCommandCount(exec *HTTPCommandExecutor) float64 {
	cmd := HTTPCommand{Command: "COMMAND/COUNT", Body: map[string]interface{}{"key": ""}}
	responseValue, _ := exec.FireCommand(cmd)
	if responseValue == nil {
		return -1
	}
	return responseValue.(float64)
}

func BenchmarkCountCommand(b *testing.B) {
	exec := NewHTTPCommandExecutor()

	b.ResetTimer()
	for n := 0; n < b.N; n++ {
		commandCount := getCommandCount(exec)
		if commandCount <= 0 {

Review comment (bug):
We can add one more scenario for below case
```
redis> COMMAND COUNT 123
(error) wrong number of arguments for 'command|count' command
```

Code after:
package http

import (
	"testing"

	"gotest.tools/v3/assert"
)

func TestCommandCount(t *testing.T) {
	exec := NewHTTPCommandExecutor()

	testCases := []struct {
		name          string
		commands      []HTTPCommand
		expected      []interface{}
		errorExpected bool
		assertType    []string
	}{
		{
			name: "Command count should be greather than zero",
			commands: []HTTPCommand{
				{Command: "COMMAND/COUNT"},
			},
			expected:   []interface{}{float64(0)},
			assertType: []string{"greater"},
		},
		{
			name: "Command count should not support any argument",
			commands: []HTTPCommand{
				{Command: "COMMAND/COUNT", Body: map[string]interface{}{"key": ""}},
			},
			expected:   []interface{}{"ERR wrong number of arguments for 'command|count' command"},
			assertType: []string{"equal"},
		},
Repository: DiceDB/dice
File: integration_tests/commands/http/check_type_test.go (Go)

Code before:
			assertType: []string{"equal", "equal"},
			delays:     []time.Duration{0, 0},
		},
		{
			name: "LPUSH, LPOP, RPUSH, RPOP a key holding a set",
			commands: []HTTPCommand{
				{Command: "SADD", Body: map[string]interface{}{"key": "foo", "member": "bar"}},
				{Command: "LPUSH", Body: map[string]interface{}{"key": "foo", "value": "bar"}},
				{Command: "LPOP", Body: map[string]interface{}{"key": "foo"}},
				{Command: "RPUSH", Body: map[string]interface{}{"key": "foo", "value": "bar"}},
				{Command: "RPOP", Body: map[string]interface{}{"key": "foo"}},
			},
			expected:   []interface{}{float64(1), setErrorMsg, setErrorMsg, setErrorMsg, setErrorMsg},
			assertType: []string{"equal", "equal", "equal", "equal", "equal"},
			delays:     []time.Duration{0, 0, 0, 0, 0},
		},
	}
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			exec.FireCommand(HTTPCommand{Command: "DEL", Body: map[string]interface{}{"key": "foo"}})
			for i, cmd := range tc.commands {
				if tc.delays[i] > 0 {
					time.Sleep(tc.delays[i])
				}
				result, _ := exec.FireCommand(cmd)
				if len(tc.assertType) == 0 {
					assert.Equal(t, tc.expected[i], result, "Value mismatch for cmd %s", cmd)
				} else {
					switch tc.assertType[i] {
					case "equal":
						assert.Equal(t, tc.expected[i], result, "Value mismatch for cmd %s", cmd)
					}
				}
			}
		})
	}
}


Review comment (suggestion):
Thanks for taking up my suggestion. Yes, the code format for the file was not as per the requirements, but there are lot of other PRs with the same change, I am sure one of those will have it fixed before this is merged. I have question with this` if ` condition, given that none of the test cases have an empty array.
Thanks

Code after:
			assertType: []string{"equal", "equal"},
			delays:     []time.Duration{0, 0},
		},
		{
			name: "LPUSH, LPOP, RPUSH, RPOP a key holding a set",
			commands: []HTTPCommand{
				{Command: "SADD", Body: map[string]interface{}{"key": "foo", "member": "bar"}},
				{Command: "LPUSH", Body: map[string]interface{}{"key": "foo", "value": "bar"}},
				{Command: "LPOP", Body: map[string]interface{}{"key": "foo"}},
				{Command: "RPUSH", Body: map[string]interface{}{"key": "foo", "value": "bar"}},
				{Command: "RPOP", Body: map[string]interface{}{"key": "foo"}},
			},
			expected:   []interface{}{float64(1), setErrorMsg, setErrorMsg, setErrorMsg, setErrorMsg},
			assertType: []string{"equal", "equal", "equal", "equal", "equal"},
			delays:     []time.Duration{0, 0, 0, 0, 0},
		},
	}
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			exec.FireCommand(HTTPCommand{Command: "DEL", Body: map[string]interface{}{"key": "foo"}})
			for i, cmd := range tc.commands {
				if tc.delays[i] > 0 {
					time.Sleep(tc.delays[i])
				}
				result, _ := exec.FireCommand(cmd)
				switch tc.assertType[i] {
				case "equal":
					assert.Equal(t, tc.expected[i], result, "Value mismatch for cmd %s", cmd)
				}
			}
		})
	}
}
Repository: DiceDB/dice
File: internal/eval/eval.go (Go)

Code before:
	count := 10

	// Parse optional arguments
	for i := 2; i < len(args); i += 2 {
		switch strings.ToUpper(args[i]) {
		case "MATCH":
			if i+1 < len(args) {
				pattern = args[i+1]
			}
		case CountConst:
			if i+1 < len(args) {
				parsedCount, err := strconv.Atoi(args[i+1])
				if err != nil || parsedCount < 1 {
					return diceerrors.NewErrWithMessage("value is not an integer or out of range")
				}
				count = parsedCount
			}
		}
	}

	keys := make([]string, 0, len(hashMap))
	for k := range hashMap {
		keys = append(keys, k)
	}
	sort.Strings(keys)

	matched := 0
	results := make([]string, 0, count*2)
	newCursor := 0

	g, err := glob.Compile(pattern)
	if err != nil {
		return diceerrors.NewErrWithMessage(fmt.Sprintf("Invalid glob pattern: %s", err))
	}

	// Scan the keys and add them to the results if they match the pattern
	for i := int(cursor); i < len(keys); i++ {
		if g.Match(keys[i]) {
			results = append(results, keys[i], hashMap[keys[i]])
			matched++
			if matched >= count {
				newCursor = i + 1
				break
			}
		}
	}

	// If we've scanned all keys, reset cursor to 0
	if newCursor >= len(keys) {
		newCursor = 0
	}

Review comment (performance):
This makes our method have O(n) complexity (which is different from redis, which offers O(1)), please add a comment here mentioning the same. Could you also update this commands doc page in the docs directory with this information?

Code after:
	count := 10

	// Parse optional arguments
	for i := 2; i < len(args); i += 2 {
		switch strings.ToUpper(args[i]) {
		case "MATCH":
			if i+1 < len(args) {
				pattern = args[i+1]
			}
		case CountConst:
			if i+1 < len(args) {
				parsedCount, err := strconv.Atoi(args[i+1])
				if err != nil || parsedCount < 1 {
					return diceerrors.NewErrWithMessage("value is not an integer or out of range")
				}
				count = parsedCount
			}
		}
	}

	// Note that this implementation has a time complexity of O(N), where N is the number of keys in 'hashMap'.
	// This is in contrast to Redis, which implements HSCAN in O(1) time complexity by maintaining a cursor.
	keys := make([]string, 0, len(hashMap))
	for k := range hashMap {
		keys = append(keys, k)
	}
	sort.Strings(keys)

	matched := 0
	results := make([]string, 0, count*2)
	newCursor := 0

	g, err := glob.Compile(pattern)
	if err != nil {
		return diceerrors.NewErrWithMessage(fmt.Sprintf("Invalid glob pattern: %s", err))
	}

	// Scan the keys and add them to the results if they match the pattern
	for i := int(cursor); i < len(keys); i++ {
		if g.Match(keys[i]) {
			results = append(results, keys[i], hashMap[keys[i]])
			matched++
			if matched >= count {
				newCursor = i + 1
				break
			}
		}
	}

	// If we've scanned all keys, reset cursor to 0
	if newCursor >= len(keys) {
Repository: DiceDB/dice
File: integration_tests/commands/async/hmset_test.go (Go)

Code before:
package async

import (
	"gotest.tools/v3/assert"
	"testing"
)

func TestHMSET(t *testing.T) {
	conn := getLocalConnection()
	defer conn.Close()
	defer FireCommand(conn, "DEL key key_new")

	testCases := []TestCase{
		{
			commands: []string{"HMSET key field value", "HMSET key field value_new"},
			expected: []interface{}{"OK", "OK"},
		},
		{
			commands: []string{"HMSET key field1 value1"},
			expected: []interface{}{"OK"},
		},
		{
			commands: []string{"HMSET key field2 value2 field3 value3"},
			expected: []interface{}{"OK"},
		},
		{
			commands: []string{"HMSET key_new field value", "HMSET key_new field new_value", "HMSET key_new"},
			expected: []interface{}{"OK", "OK", "ERR wrong number of arguments for 'hmset' command"},
		},
		{
			commands: []string{"SET k v", "HMSET k f v"},
			expected: []interface{}{"OK", "WRONGTYPE Operation against a key holding the wrong kind of value"},
		},

Review comment (suggestion):
Please add a test case where you are setting multiple fields in a single `HMSET` command, then verify that all of those fields contain the new value. To make this test even more robust, some of these fields could be pre-existing, while others can be new.

Code after:
package async

import (
	"gotest.tools/v3/assert"
	"testing"
)

func TestHMSET(t *testing.T) {
	conn := getLocalConnection()
	defer conn.Close()
	defer FireCommand(conn, "DEL key key_new key2")

	testCases := []TestCase{
		{
			commands: []string{"HMSET key field value field2 value2", "HGET key field",
				"HGET key field2", "HMSET key field3 value_new field value4", "HGET key field3", "HGET key field2",
				"HGET key field"},
			expected: []interface{}{"OK", "value", "value2", "OK", "value_new", "value2", "value4"},
		},
		{
			commands: []string{"HMSET key2 field1 value1", "HGET key2 xxxx", "HGET key2 field1"},
			expected: []interface{}{"OK", "(nil)", "value1"},
		},
		{
			commands: []string{"HMSET key field2 value2 field3 value3"},
			expected: []interface{}{"OK"},
		},
		{
			commands: []string{"HMSET key_new field value field2 value2", "HMSET key_new field new_value", "HMSET key_new",
				"HGET key_new field", "HGET key_new field2"},
			expected: []interface{}{"OK", "OK", "ERR wrong number of arguments for 'hmset' command", "new_value", "value2"},
		},
		{
Repository: DiceDB/dice
File: internal/eval/eval.go (Go)

Code before:
	obj = store.NewObj(mergedHll, -1, object.ObjTypeString, object.ObjEncodingRaw)
	store.Put(destKey, obj)

	return clientio.RespOK
}

func evalJSONSTRLEN(args []string, store *dstore.Store) []byte {
	if len(args) < 1 {
		return diceerrors.NewErrArity("JSON.STRLEN")
	}

	key := args[0]

	if len(args) < 2 {
		// no recursive
		// making consistent with arrlen
		// to-do parsing
		obj := store.Get(key)

		if obj == nil {
			return clientio.RespNIL
		}
		jsonData := obj.Value

		if utils.GetJSONFieldType(jsonData) != utils.StringType {
			return diceerrors.NewErrPathTypeErr(utils.GetJSONFieldType(jsonData))
		}
		return clientio.Encode(len(jsonData.(string)), false)
	}

	path := args[1]

	obj := store.Get(key)

	if obj == nil {
		return clientio.RespNIL
	}

	// Check if the object is of JSON type
	errWithMessage := object.AssertTypeAndEncoding(obj.TypeEncoding, object.ObjTypeJSON, object.ObjEncodingJSON)
	if errWithMessage != nil {
		return errWithMessage
	}

	jsonData := obj.Value
	if path == defaultRootPath {
		defaultStringResult := make([]interface{}, 0, 1)
		if utils.GetJSONFieldType(jsonData) == utils.StringType {
			defaultStringResult = append(defaultStringResult, int64(len(jsonData.(string))))
		} else {
			defaultStringResult = append(defaultStringResult, clientio.RespNIL)

Review comment (suggestion):
nit: can avoid extra code
```suggestion
			return diceerrors.NewErrWithFormattedMessage(JSONPathValueTypeErr, strings.ToLower(utils.GetJSONFieldType(jsonData)))
```

Code after:
		hll := hyperloglog.New()
		for _, arg := range args[1:] {
			hll.Insert([]byte(arg))
		}

		obj = store.NewObj(hll, -1, object.ObjTypeString, object.ObjEncodingRaw)

		store.Put(key, obj)
		return clientio.Encode(1, false)
	}

	existingHll, ok := obj.Value.(*hyperloglog.Sketch)
	if !ok {
		return diceerrors.NewErrWithMessage(diceerrors.WrongTypeHllErr)
	}
	initialCardinality := existingHll.Estimate()
	for _, arg := range args[1:] {
		existingHll.Insert([]byte(arg))
	}

	if newCardinality := existingHll.Estimate(); initialCardinality != newCardinality {
		return clientio.Encode(1, false)
	}

	return clientio.Encode(0, false)
}

func evalPFCOUNT(args []string, store *dstore.Store) []byte {
	if len(args) < 1 {
		return diceerrors.NewErrArity("PFCOUNT")
	}

	unionHll := hyperloglog.New()

	for _, arg := range args {
		obj := store.Get(arg)
		if obj != nil {
			currKeyHll, ok := obj.Value.(*hyperloglog.Sketch)
			if !ok {
				return diceerrors.NewErrWithMessage(diceerrors.WrongTypeHllErr)
			}
			err := unionHll.Merge(currKeyHll)
			if err != nil {
				return diceerrors.NewErrWithMessage(diceerrors.InvalidHllErr)
			}
		}
	}

	return clientio.Encode(unionHll.Estimate(), false)
}
Repository: DiceDB/dice
File: internal/eval/eval.go (Go)

Code before:
	obj = store.NewObj(mergedHll, -1, object.ObjTypeString, object.ObjEncodingRaw)
	store.Put(destKey, obj)

	return clientio.RespOK
}

func evalJSONSTRLEN(args []string, store *dstore.Store) []byte {
	if len(args) < 1 {
		return diceerrors.NewErrArity("JSON.STRLEN")
	}

	key := args[0]

	if len(args) < 2 {
		// no recursive
		// making consistent with arrlen
		// to-do parsing
		obj := store.Get(key)

		if obj == nil {
			return clientio.RespNIL
		}
		jsonData := obj.Value

		if utils.GetJSONFieldType(jsonData) != utils.StringType {
			return diceerrors.NewErrWithFormattedMessage(diceerrors.JSONPathValueTypeErr, strings.ToLower(utils.GetJSONFieldType(jsonData)))
		}
		return clientio.Encode(len(jsonData.(string)), false)
	}

	path := args[1]

	obj := store.Get(key)

	if obj == nil {
		return clientio.RespNIL
	}

	// Check if the object is of JSON type
	errWithMessage := object.AssertTypeAndEncoding(obj.TypeEncoding, object.ObjTypeJSON, object.ObjEncodingJSON)
	if errWithMessage != nil {
		return errWithMessage
	}

	jsonData := obj.Value
	if path == defaultRootPath {
		defaultStringResult := make([]interface{}, 0, 1)
		if utils.GetJSONFieldType(jsonData) == utils.StringType {
			defaultStringResult = append(defaultStringResult, int64(len(jsonData.(string))))
		} else {
			defaultStringResult = append(defaultStringResult, clientio.RespNIL)

Review comment (suggestion):
suggestion:
```suggestion
                         currType := strings.ToLower(utils.GetJSONFieldType(jsonData))
                         if currType == "number"{
                                  currType = "integer"
                         }
			return diceerrors.NewErrWithFormattedMessage(diceerrors.JSONPathValueTypeErr, currType)
```

Code after:
		hll := hyperloglog.New()
		for _, arg := range args[1:] {
			hll.Insert([]byte(arg))
		}

		obj = store.NewObj(hll, -1, object.ObjTypeString, object.ObjEncodingRaw)

		store.Put(key, obj)
		return clientio.Encode(1, false)
	}

	existingHll, ok := obj.Value.(*hyperloglog.Sketch)
	if !ok {
		return diceerrors.NewErrWithMessage(diceerrors.WrongTypeHllErr)
	}
	initialCardinality := existingHll.Estimate()
	for _, arg := range args[1:] {
		existingHll.Insert([]byte(arg))
	}

	if newCardinality := existingHll.Estimate(); initialCardinality != newCardinality {
		return clientio.Encode(1, false)
	}

	return clientio.Encode(0, false)
}

func evalPFCOUNT(args []string, store *dstore.Store) []byte {
	if len(args) < 1 {
		return diceerrors.NewErrArity("PFCOUNT")
	}

	unionHll := hyperloglog.New()

	for _, arg := range args {
		obj := store.Get(arg)
		if obj != nil {
			currKeyHll, ok := obj.Value.(*hyperloglog.Sketch)
			if !ok {
				return diceerrors.NewErrWithMessage(diceerrors.WrongTypeHllErr)
			}
			err := unionHll.Merge(currKeyHll)
			if err != nil {
				return diceerrors.NewErrWithMessage(diceerrors.InvalidHllErr)
			}
		}
	}

	return clientio.Encode(unionHll.Estimate(), false)
}