Fixing static analyzer issues.

helper/README.md

@@ -152,7 +152,7 @@ fmt.Println(actual) // [2, 4, 6, 8, 10, 12, 14, 16, 18, 20]
 ```
 
 <a name="AppendOrWriteToCsvFile"></a>
-## func [AppendOrWriteToCsvFile](<https://github.com/cinar/indicator/blob/v2/helper/csv.go#L287>)
+## func [AppendOrWriteToCsvFile](<https://github.com/cinar/indicator/blob/v2/helper/csv.go#L285>)
 
 ```go
 func AppendOrWriteToCsvFile[T any](fileName string, hasHeader bool, rows <-chan *T) error
@@ -553,7 +553,7 @@ fmt.Println(helper.ChanToSlice(squared)) // [4, 9, 25, 100]
 ```
 
 <a name="ReadFromCsvFile"></a>
-## func [ReadFromCsvFile](<https://github.com/cinar/indicator/blob/v2/helper/csv.go#L274>)
+## func [ReadFromCsvFile](<https://github.com/cinar/indicator/blob/v2/helper/csv.go#L272>)
 
 ```go
 func ReadFromCsvFile[T any](fileName string, hasHeader bool) (<-chan *T, error)
@@ -851,7 +851,7 @@ AppendToFile appends the provided rows of data to the end of the specified file,
 func (c *Csv[T]) ReadFromFile(fileName string) (<-chan *T, error)
 ```
 
-ReadFromFile parses the CSV data from the provided file name, maps the data to corresponding struct fields, and delivers the resulting snapshots through the channel.
+ReadFromFile parses the CSV data from the provided file name, maps the data to corresponding struct fields, and delivers the resulting rows through the channel.
 
 <a name="Csv[T].ReadFromReader"></a>
 ### func \(\*Csv\[T\]\) [ReadFromReader](<https://github.com/cinar/indicator/blob/v2/helper/csv.go#L91>)

helper/csv.go

@@ -142,7 +142,7 @@ func (c *Csv[T]) ReadFromReader(reader io.Reader) <-chan *T {
 
 // ReadFromFile parses the CSV data from the provided file name,
 // maps the data to corresponding struct fields, and delivers
-// the resulting snapshots through the channel.
+// the resulting rows through the channel.
 func (c *Csv[T]) ReadFromFile(fileName string) (<-chan *T, error) {
 	file, err := os.Open(filepath.Clean(fileName))
 	if err != nil {
@@ -168,13 +168,13 @@ func (c *Csv[T]) ReadFromFile(fileName string) (<-chan *T, error) {
 // file's column order matches the field order of the given row struct to ensure consistent
 // data structure.
 func (c *Csv[T]) AppendToFile(fileName string, rows <-chan *T) error {
-	return c.writeToFile(fileName, os.O_APPEND, rows)
+	return c.writeToFileWithFlag(fileName, os.O_APPEND, rows)
 }
 
 // WriteToFile creates a new file with the given name and writes the provided rows
 // of data to it, overwriting any existing content.
 func (c *Csv[T]) WriteToFile(fileName string, rows <-chan *T) error {
-	return c.writeToFile(fileName, os.O_CREATE, rows)
+	return c.writeToFileWithFlag(fileName, os.O_CREATE, rows)
 }
 
 // updateColumnIndexes aligns column indices to match the order of column headers.
@@ -201,24 +201,22 @@ func (c *Csv[T]) updateColumnIndexes(csvReader *csv.Reader) error {
 	return nil
 }
 
-// writeToFile writes the provided rows of data to a file with the given name, using the
+// writeToFileWithFlag writes the provided rows of data to a file with the given name, using the
 // specified flag mode for precise control over file opening and writing behavior.
-func (c *Csv[T]) writeToFile(fileName string, flag int, rows <-chan *T) error {
-	file, err := os.OpenFile(filepath.Clean(fileName), flag|os.O_WRONLY, 0644)
+func (c *Csv[T]) writeToFileWithFlag(fileName string, flag int, rows <-chan *T) error {
+	file, err := os.OpenFile(filepath.Clean(fileName), flag|os.O_WRONLY, 0600)
 	if err != nil {
 		return err
 	}
 
-	defer file.Close()
-
 	writeHeader := c.hasHeader && (flag == os.O_CREATE)
 
 	err = c.writeToWriter(file, writeHeader, rows)
 	if err != nil {
 		return err
 	}
 
-	return file.Sync()
+	return file.Close()
 }
 
 // writeToWriter writes the provided rows of data to the specified writer, with the option