print readable variables with golang

Question

How to print a map, struct or whatever in a readable way?

With PHP you can to this

echo \'
\';
print_r($var);
echo \'
\';
         


        

Answer 1

Use the Go fmt package. For example,

package main

import "fmt"

func main() {
    variable := "var"
    fmt.Println(variable)
    fmt.Printf("%#v\n", variable)
    header := map[string]string{"content-type": "text/plain"}
    fmt.Println(header)
    fmt.Printf("%#v\n", header)
}

Output:

var
"var"
map[content-type:text/plain]
map[string]string{"content-type":"text/plain"}

Package fmt

import "fmt" 

Overview

Package fmt implements formatted I/O with functions analogous to C's printf and scanf. The format 'verbs' are derived from C's but are simpler.