每日一题---14. 最长公共前缀[力扣][Go]

func longestCommonPrefix(strs []string) string {
  if strs[0] == "" {
    return ""
  }
  index := 1
  s := ""
  n := len(strs[0])
  for index <= n {
    s = strs[0][:index]
    for _, s2 := range strs {
      if index <= len(s2) {
        if s2[:index] != s {
          return s[:len(s) - 1]
        }
      } else {
        return s[:len(s) - 1]
      }
    }
    index ++
  }
  return ""
}