Golang golang-log2 (snippet)

Go programming example 'golang-log2'

golang-log2

Golang beginners example: golang-log2

package main

import (
    "io"
    "log"
    "os"
)

var (
    Info    *log.Logger
    Warning *log.Logger
    Error   *log.Logger
)

func LogInit(infoHandle, warningHandle, errorHandle io.Writer) {

    Info = log.New(infoHandle,
        "INFO: ",
        log.Ltime|log.Lshortfile)

    Warning = log.New(warningHandle,
        "WARNING: ",
        log.Ltime|log.Lshortfile)

    Error = log.New(errorHandle,
        "ERROR: ",
        log.Ldate|log.Ltime|log.Lshortfile)
}

func main() {
    LogInit(os.Stdout, os.Stderr, os.Stderr)
    Info.Println("this is only a info message")
    Warning.Println("you can print warnings the same way")
    Error.Println("and even errors work as expected")

    print("\n")

    Info.Printf(`
        You can do everything, a normal log.X command can do
        In addition you can specify the output stream: stdout or stderr
        And define additional prefix und suffix strings.
    `)
}

Useful links

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