删除重复的slice

func removeDuplicate(slis *[]string) {
  found := make(map[string]bool)
    j := 0
    for i,val := range *slis {
      if _,ok := found[val]; !ok {
          found[val] = true
          (*slis)[j] = (*slis)[i]
          j++
      }
    }
  *slis = (*slis)[:j]
  }