strings.Split切分空字符串的坑

func main(){
  s:=""
  sArray := strings.Split(s, ",")
  fmt.Printf("%v\n",sArray) //[]
  fmt.Printf("===%v---",sArray[0]) //===---
  fmt.Printf("%v\n",len(sArray)) //1
  sArray = []string{}
  fmt.Printf("%v\n",len(sArray)) //0
  fmt.Printf("===%v---",sArray[0]) //panic
}