I can't compile the following Go code. I keep getting an error that variable 'header' is not used. I'm trying to read and process a CSV file. The file is read line by line an so I need to save the header into a "outside-the-loop" variable I can refer to when processing CSV lines. Anyone knows what I'm doing incorrectly as a new Go user?
func main() {
...
inputData := csv.NewReader(file)
var header []string
//keep reading the file until EOF is reached
for j := 0; ; j++ {
i, err := inputData.Read()
if err == io.EOF {
break
}
if j == 0 {
header = i
} else {
// Business logic in here
fmt.Println(i)
//TODO convert to JSON
//TODO send to SQS
}
}
}
You can assign to a blank identifier just to be able to compile your code, like: _ = header. As example:
package main
import (
"encoding/csv"
"fmt"
"io"
"strings"
)
func main() {
in := `first_name,last_name,username
"Rob","Pike",rob
Ken,Thompson,ken
"Robert","Griesemer","gri"
`
file := strings.NewReader(in)
inputData := csv.NewReader(file)
var header []string
//keep reading the file until EOF is reached
for j := 0; ; j++ {
i, err := inputData.Read()
if err == io.EOF {
break
}
if j == 0 {
header = i
} else {
// Business logic in here
fmt.Println(i)
//TODO convert to JSON
//TODO send to SQS
}
}
_ = header
}