func main() {
  mainSl := []string{"Test", "slices", "copying"}

  var sl []string
  copy(sl, mainSl)

  sl1 := make([]string, 1, 3)
  copy(sl1, mainSl)

  fmt.Println(sl, sl1)
}

var m = map[string]int{"a": 1}

func main() {
  go Read()
  time.Sleep(1 * time.Second)
  go Write()
  time.Sleep(1 * time.Minute)
}

func Read() {
  for {
    fmt.Println(m["a"])
  }
}

func Write() {
  for i := 0; ; i++ {
    m[fmt.Sprintf("%d", i)] = i
  }
}

func main() {
  runtime.GOMAXPROCS(1)

  wg := sync.WaitGroup{}

  for i := 0; i < 10; i++ {
    wg.Add(1)
    go func(n int) {
      defer wg.Done()

      fmt.Println(n)
    }(i)
  }

  wg.Wait()
}

func main() {
  items := []string{
    "Кошка",
    "Собака",
    "Роза",
  }

  animals := items[0:2]
  plants := items[2:3]

  animals = append(animals, "Хомяк")

  fmt.Printf("Животные: %v (len: %d, cap: %d)\n", animals, len(animals), cap(animals))
  fmt.Printf("Растения: %v (len: %d, cap: %d)\n", plants, len(plants), cap(plants))
}