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
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+6.1k Golang : Force download file example
+5.7k Golang : Generate Code128 barcode
+7k Golang : How to reverse elements order in map ?
+2.4k Golang : Transform lisp or spinal case to Pascal case example
+10.5k Golang : Test file read write permission example
+7.7k Golang : Find file size(disk usage) with filepath.Walk
+2.5k Golang : Shuffle array of list
+2.2k Golang : Reclaim memory occupied by make() example
+5.4k Javascript : Read/parse JSON data from HTTP response
+6k Golang : Interfacing with PayPal's IPN(Instant Payment Notification) example
+4.6k Gogland : Single File versus Go Application Run Configurations
+22.3k Golang : Convert []byte to image