How remove \n from lines

Question

file, _ := os.Open("x.txt")     f := bufio.NewReader(file)      for {         read_line, _ := ReadString('\n')         fmt.Print(read_line)           // other code what work with parsed line...         } 

end it add \n on every line , end program to work , only work with last line...

Please put example, i try anything end any solution what i find here not work for me.

Answer 1

You can slice off the last character:

read_line = read_line[:len(read_line)-1] 

Perhaps a better approach is to use the strings library:

read_line = strings.TrimSuffix(read_line, "\n") 

Answer 2

If you want to read a file line-by-line, using bufio.Scanner will be easier. Scanner won't includes endline (\n or \r\n) into the line.

file, err := os.Open("yourfile.txt") if err != nil {     //handle error     return } defer file.Close()  s := bufio.NewScanner(file) for s.Scan() {     read_line := s.Text()      // other code what work with parsed line... } 

If you want to remove endline, I suggest you to use TrimRightFunc, i.e.

read_line = strings.TrimRightFunc(read_line, func(c rune) bool {     //In windows newline is \r\n     return c == '\r' || c == '\n' }) 

Update:
As pointed by @GwynethLlewelyn, using TrimRight will be simpler (cleaner), i.e.

 read_line = strings.TrimRight(read_line, "\r\n") 

Internally, TrimRight function call TrimRightFunc, and will remove the character if it match any character given as the second argument of TrimRight.