myDebug.go

/*
When debugging your code in goLang you may need a pretty print function not just for int or strings,
but capable to render any kind of data structure. Here it is, simple and useful. Enjoy it!
*/

package main

import (
	"encoding/json"
	"fmt"
	"reflect"
)

func interface2string(i interface{}) string {
	pretty, err := json.MarshalIndent(i, "", "  ")
	if err != nil {
		fmt.Println("error: ", err)
	}
	return string(pretty)
}

func myDebug_static(s string, i interface{}) {
	pretty := interface2string(i)
	fmt.Printf("\nmyDebug: %s (%s) => %s\n", s, reflect.TypeOf(i).String(), string(pretty))
	// fmt.Printf("\n\nmyDebug: %s RAW => %s", s, i)
	// fmt.Printf("\n\nmyDebugPlain: %+v\n", i)
}

// Debugging function to show a data structure w/ pretty style
// If called with 1 parameter, it just show its value
// If call with 2 parameters, the first one should be the name of the structure to enhance debug visibility
func myDebug(params ...interface{}) {
	if len(params) == 0 {
		fmt.Println("\nError: not enough parameters when calling myDebug function")
	} else if len(params) == 1 {
		myDebug_static("", params[0])
	} else if len(params) == 2 {
		switch params[0].(type) {
		case string:
			myDebug_static(params[0].(string), params[1])
		default:
			myDebug_static("", params[0])
			myDebug_static("", params[1])
		}
	} else {
		fmt.Println("\nError: too many parameters when calling myDebug function")
	}
}

func main() {
	link1 := "https://hn.algolia.com/?dateRange=pastWeek&page=0&prefix=false&query=golang&sort=byDate&type=story"
	link2 := "https://www.serverlab.ca/tutorials/linux/administration-linux/how-to-configure-proxy-on-ubuntu-18-04/"
	link3 := "https://www.expressvpn.com/what-is-my-ip?gclid=CjwKCAjw34n5BRA9EiwA2u9k3-hTxM73D-v-MsEX21RKlAucrnrXkJ5aWR-xduY4V-_i-gcJEdjKCBoCgsMQAvD_BwE"

	type ALink struct {
		Url     string
		Count   int
		Visited bool
	}

	var LPool []ALink

	LPool = append(LPool, ALink{Url: link1, Count: 0, Visited: false})
	LPool = append(LPool, ALink{Url: link2, Count: 0, Visited: false})
	LPool = append(LPool, ALink{Url: link3, Count: 0, Visited: false})

	// myDebug("LPool", LPool)
	myDebug(LPool)
}