GoCsv
GoCsv is a library written in pure Go to use csv data more comfortable
Supported Go version
- golang >= 1.13
Installation
go get github.com/shr0048/gocsv
Feature
- Freely set the separator (Ex: ',' '\t' ';' etc)
- Support Collection model
- Include Map, Filter, Reduce
- All cell data is converting Go-Map
Example
package main
import (
"fmt"
"github.com/shr0048/gocsv"
"strconv"
"strings"
)
func convertCap(record gocsv.Record) gocsv.Record {
newRecod := gocsv.Record{}
for _, cell := range record {
if val, ok := cell[`"Name"`]; ok {
capVal := strings.ToUpper(val)
newCell := gocsv.Cell{"Name": capVal}
newRecod = append(newRecod, newCell)
} else {
newRecod = append(newRecod, cell)
}
}
return newRecod
}
func filteringAge(record gocsv.Record) bool {
for _, cell := range record {
if val, ok := cell[`"Age"`]; ok {
age, _ := strconv.ParseFloat(strings.TrimSpace(val), 64)
if age >= 21 {
return true
} else {
return false
}
}
}
// No 'Age' Column
return false
}
func totalAge(a, b interface{}) interface{} {
var age float64
for _, cell := range b.(gocsv.Record) {
if val, ok := cell[`"Age"`]; ok {
age, _ = strconv.ParseFloat(strings.TrimSpace(val), 64)
}
}
return a.(float64) + age
}
func main() {
fmt.Println("##### Example of Using Collection functions #####")
myCsv := gocsv.CSV{}
err := myCsv.LoadCSV("./mlb_players.csv", ", ")
if err != nil {
fmt.Print("Load error")
}
fmt.Println("Convert all Name as uppercase")
// Apply Map
mapCsv := myCsv.Map(convertCap)
// Print all rows
row, ok := mapCsv.NextRow()
for ok {
fmt.Println(row)
row, ok = mapCsv.NextRow()
}
// Apply Filter and Reduce
filtered := mapCsv.Filter(filteringAge)
count := filtered.RowNum
avg := filtered.Reduce(float64(0), totalAge)
fmt.Printf("Get average age over 21: %f \n", avg.(float64) / float64(count))
}
License
MIT License
Copyright (c) 2020 HeraldSim
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
