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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package csv_test
import (
"encoding/csv"
"fmt"
"io"
"log"
"os"
"strings"
)
func ExampleReader() {
in := `first_name,last_name,username
"Rob","Pike",rob
Ken,Thompson,ken
"Robert","Griesemer","gri"
`
r := csv.NewReader(strings.NewReader(in))
for {
record, err := r.Read()
if err == io.EOF {
break
}
if err != nil {
log.Fatal(err)
}
fmt.Println(record)
}
// Output:
// [first_name last_name username]
// [Rob Pike rob]
// [Ken Thompson ken]
// [Robert Griesemer gri]
}
// This example shows how csv.Reader can be configured to handle other
// types of CSV files.
func ExampleReader_options() {
in := `first_name;last_name;username
"Rob";"Pike";rob
# lines beginning with a # character are ignored
Ken;Thompson;ken
"Robert";"Griesemer";"gri"
`
r := csv.NewReader(strings.NewReader(in))
r.Comma = ';'
r.Comment = '#'
records, err := r.ReadAll()
if err != nil {
log.Fatal(err)
}
fmt.Print(records)
// Output:
// [[first_name last_name username] [Rob Pike rob] [Ken Thompson ken] [Robert Griesemer gri]]
}
func ExampleReader_ReadAll() {
in := `first_name,last_name,username
"Rob","Pike",rob
Ken,Thompson,ken
"Robert","Griesemer","gri"
`
r := csv.NewReader(strings.NewReader(in))
records, err := r.ReadAll()
if err != nil {
log.Fatal(err)
}
fmt.Print(records)
// Output:
// [[first_name last_name username] [Rob Pike rob] [Ken Thompson ken] [Robert Griesemer gri]]
}
func ExampleWriter() {
records := [][]string{
{"first_name", "last_name", "username"},
{"Rob", "Pike", "rob"},
{"Ken", "Thompson", "ken"},
{"Robert", "Griesemer", "gri"},
}
w := csv.NewWriter(os.Stdout)
for _, record := range records {
if err := w.Write(record); err != nil {
log.Fatalln("error writing record to csv:", err)
}
}
// Write any buffered data to the underlying writer (standard output).
w.Flush()
if err := w.Error(); err != nil {
log.Fatal(err)
}
// Output:
// first_name,last_name,username
// Rob,Pike,rob
// Ken,Thompson,ken
// Robert,Griesemer,gri
}
func ExampleWriter_WriteAll() {
records := [][]string{
{"first_name", "last_name", "username"},
{"Rob", "Pike", "rob"},
{"Ken", "Thompson", "ken"},
{"Robert", "Griesemer", "gri"},
}
w := csv.NewWriter(os.Stdout)
w.WriteAll(records) // calls Flush internally
if err := w.Error(); err != nil {
log.Fatalln("error writing csv:", err)
}
// Output:
// first_name,last_name,username
// Rob,Pike,rob
// Ken,Thompson,ken
// Robert,Griesemer,gri
}