Append to file

---

examples/append-to-file/append_to_file.go

package main

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

const filename = "my.log"

func main() {
    debug("Hello")
    show()
    debug("World")
    show()
}

func show() {
    content, err := ioutil.ReadFile(filename)
    if err != nil {
        fmt.Printf("Could not open file '%v' for reading: %v", filename, err)
        return
    }
    fmt.Println(string(content))
    fmt.Println()
}

func debug(text string) {
    fh, err := os.OpenFile(filename, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
    if err != nil {
        fmt.Println(err)
        return
    }
    fh.WriteString(text + "\n")
    fh.Close()
}