Shit of base64 integer conversions

base64shit.go

package main
import (
  "fmt"
)

func main() {
  fmt.Println(i_to_base64(500))
}

func i_to_base64(num int) string {
  b64 := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_-"
  base := len(b64)
  str := ""
  for num > 0 {
    r := num % base
    num -= r
    num /= base
    str = string(b64[r]) + str
  }
  return str
}