Forked from novalagung/golang-create-read-write-delete-file.go
Created
February 4, 2017 22:54
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| package main | |
| import ( | |
| "fmt" | |
| "io" | |
| "os" | |
| ) | |
| var path = "/Users/novalagung/Documents/temp/test.txt" | |
| func main() { | |
| createFile() | |
| writeFile() | |
| readFile() | |
| deleteFile() | |
| } | |
| func createFile() { | |
| // detect if file exists | |
| var _, err = os.Stat(path) | |
| // create file if not exists | |
| if os.IsNotExist(err) { | |
| var file, err = os.Create(path) | |
| checkError(err) | |
| defer file.Close() | |
| } | |
| } | |
| func writeFile() { | |
| // open file using READ & WRITE permission | |
| var file, err = os.OpenFile(path, os.O_RDWR, 0644) | |
| checkError(err) | |
| defer file.Close() | |
| // write some text to file | |
| _, err = file.WriteString("halo\n") | |
| checkError(err) | |
| _, err = file.WriteString("mari belajar golang\n") | |
| checkError(err) | |
| // save changes | |
| err = file.Sync() | |
| checkError(err) | |
| } | |
| func readFile() { | |
| // re-open file | |
| var file, err = os.OpenFile(path, os.O_RDWR, 0644) | |
| checkError(err) | |
| defer file.Close() | |
| // read file | |
| var text = make([]byte, 1024) | |
| for { | |
| n, err := file.Read(text) | |
| if err != io.EOF { | |
| checkError(err) | |
| } | |
| if n == 0 { | |
| break | |
| } | |
| } | |
| fmt.Println(string(text)) | |
| checkError(err) | |
| } | |
| func deleteFile() { | |
| // delete file | |
| var err = os.Remove(path) | |
| checkError(err) | |
| } | |
| func checkError(err error) { | |
| if err != nil { | |
| fmt.Println(err.Error()) | |
| os.Exit(0) | |
| } | |
| } |
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