Golang golang-file (snippet)

Go programming example 'golang-file'

golang-file

Golang beginners example: golang-file

package main

import (
    "fmt"
    "io/ioutil"
    "os"
)

func check(e error) {
    if e != nil {
        panic(e)
    }
}

func main() {
    filename := "./file.go"

    //os.Stat returns file info
    finfo, err := os.Stat(filename)
    if err != nil {
        fmt.Println(filename + " doesn't exist")
    } else {

        //IsDir returns boolean true if finfo is a directory
        if finfo.IsDir() {
            fmt.Println(filename + " is a directory")
        } else {

            //ReadFile returns the input of the file
            gofile, err1 := ioutil.ReadFile(filename)
            check(err1)
            output := []byte(gofile)
            fmt.Println(string(gofile))

            //WriteFile writes data to a file
            err2 := ioutil.WriteFile("./file.txt", output, 0644)
            check(err2)
        }
    }
}

Useful links

• Learn Go: https://golangr.com
• Download Go: https://golang.org