lechuhuuha

package main

import "fmt"

type Counter struct{ n int }

// ---------------------
//  ⬇ value-receiver method
// ---------------------
func (c Counter) Value() int { return c.n }

lechuhuuha

package main

import "fmt"

func main() {
	a := [5]int{1, 2, 3, 4, 5}
	s1 := a[0:3] // len=3 cap=5
	s2 := a[3:5] // len=2 cap=2

	fmt.Println("initial a  :", a)   // [1 2 3 4 5]

lechuhuuha

package main

import (
	"database/sql"
	"database/sql/driver"
	"encoding/json"
	"fmt"
	"log"

	_ "github.com/lib/pq"