Golang : Skip blank/empty lines in CSV file and trim whitespaces example
Problem:
Your Golang program is reading from a CSV file and you want to skip blank lines in the CSV file. Also, you want to trim whitespaces in the final output. How to do that?
Solution:
After initiating the csv.Read()
or csv.NewReader()
functions. Set the reader's FieldsPerRecord
and TrimLeadingSpace
to:
csvReader.FieldsPerRecord = -1 // optional
csvReader.TrimLeadingSpace = true
The CSV reader will automagically ignore those empty lines.
Here you go!
package main
import (
"encoding/csv"
"fmt"
"io"
"log"
"strings"
)
func main() {
csvDataWithEmptyLines := `first_name,last_name,username
"Adam","Sandler", adam
Steve, McQueen,steve
"Robert","Spacey","robspacy"
`
csvReader := csv.NewReader(strings.NewReader(csvDataWithEmptyLines))
// add these
csvReader.FieldsPerRecord = -1
csvReader.TrimLeadingSpace = true
for {
record, err := csvReader.Read()
if err == io.EOF {
break
}
if err != nil {
log.Fatal(err)
}
fmt.Println(record)
}
}
Output:
// properly formatted and look nice
[firstname lastname username]
[Adam Sandler adam]
[Steve McQueen steve]
[Robert Spacey robspacy]
References:
See also : Golang : How to read CSV file
By Adam Ng
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