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csv.go
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/
csv.go
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package main
import (
"encoding/csv"
"io"
"os"
"path/filepath"
)
func readCSV(filename string) ([]map[string]string, error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
defer f.Close()
r := csv.NewReader(f)
return CSVToMap(r)
}
// CSVToMap takes a reader and returns an array of dictionaries, using the header row as the keys
func CSVToMap(r *csv.Reader) ([]map[string]string, error) {
var rows []map[string]string
var header []string
for {
record, err := r.Read()
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
if header == nil {
header = record
} else {
dict := make(map[string]string, len(header))
for i := range header {
dict[header[i]] = record[i]
}
rows = append(rows, dict)
}
}
return rows, nil
}
// WriteToCSV writes inputted records to a csv file
func WriteToCSV(filename string, records [][]string) error {
// Mkdir if filename dir doesn't exist
if err := os.MkdirAll(filepath.Dir(filename), 0755); err != nil {
return err
}
f, err := os.OpenFile(filename, os.O_CREATE|os.O_RDWR, 0644)
if err != nil {
return err
}
defer f.Close()
w := csv.NewWriter(f)
return w.WriteAll(records)
}