golang语言实现读取csv文件内容，把相同的内容提取到另外一个文件

package main


import (
"encoding/csv"
"fmt"
"io"
"os"
"path/filepath"
"strconv"
)


func CheckErr(err error) {
if nil != err {
panic(err)
}
}


func GetFullPath(path string) string {
absolutePath, _ := filepath.Abs(path)
return absolutePath
}


func WriteFile(content []string) {
f, err := os.OpenFile("sameName.csv", os.O_APPEND|os.O_CREATE, os.ModeAppend)
CheckErr(err)
defer f.Close()


f.WriteString("\xEF\xBB\xBF")
writer := csv.NewWriter(f)


writer.Write(content)


writer.Flush()
}


var exsit []string = []string{}


func Exsit(name string) bool {
size := len(exsit)
for i := 0; i < size; i++ {
if exsit[i] == name {
return true
}
}
return false
}


func findSame(path string) {
fullPath := GetFullPath(path)
records := getStrings(fullPath)


size := len(records)
for i := 0; i < size; i++ {
rec := records[i]
recNoDate := rec[:len(rec)-19]
flag := 1
for i2 := i + 1; i2 < size; i2++ {
if recNoDate == records[i2][:len(records[i2])-19] && !Exsit(recNoDate) {
WriteFile([]string{strconv.Itoa(flag), records[i2]})
flag++
}
}
if flag > 1 && !Exsit(recNoDate) {
exsit = append(exsit, recNoDate)
WriteFile([]string{strconv.Itoa(flag), rec})
}
}


size = len(exsit)
f, err := os.OpenFile("debug.csv", os.O_APPEND|os.O_CREATE, os.ModeAppend)
CheckErr(err)
defer f.Close()


f.WriteString("\xEF\xBB\xBF")
writer := csv.NewWriter(f)
for i := 0; i < size; i++ {
writer.Write([]string{exsit[i]})
}
writer.Flush()
}


func getStrings(path string) []string {
f, err := os.Open(path)
CheckErr(err)
defer f.Close()


records := []string{}


reader := csv.NewReader(f)
record := []string{}
for {
record, err = reader.Read()
if err == io.EOF {
break
} else if nil != err {
fmt.Println(err)
return nil
}


records = append(records, record[0])
}
return records
}


func main() {
var path string
if len(os.Args) > 1 {
path = os.Args[1]
} else {
path, _ = os.Getwd()
}
findSame(path)


fmt.Println("done!")
}