doucan1979
2013-09-28 08:45
浏览 226

用golang解析Perl正则表达式

http://play.golang.org/p/GM0SWo0qGs

This is my code and playground.

func insert_comma(input_num int) string {
    temp_str := strconv.Itoa(input_num)
    var validID = regexp.MustCompile(`\B(?=(\d{3})+$)`)
    return validID.ReplaceAllString(temp_str, ",")
}

 func main() {
    fmt.Println(insert_comma(1000000000))
 }

Basically, my desired input is 1,000,000,000. And the regular expression works in Javascript but I do not know how to make this Perl regex work in Go. I would greatly appreciate it. Thanks,

图片转代码服务由CSDN问答提供 功能建议

http://play.golang.org/p/GM0SWo0qGs

这是我的代码和游乐场。

   func insert_comma(input_num int)字符串{
 temp_str:= strconv.Itoa(input_num)
 var validID = regexp.MustCompile(`\ B(?=(\ d {3})+ $)`)
返回有效ID  .ReplaceAllString(temp_str,“,”)
} 
 
 func main(){
 fmt.Println(insert_comma(1000000000))
} 
   
 
 <  p>基本上,我想要的输入是1,000,000,000。
该正则表达式可以在Javascript中工作,但是我不知道如何使此Perl regex在Go中工作。 我将不胜感激。 谢谢, 
 
  • 写回答
  • 关注问题
  • 收藏
  • 邀请回答

1条回答 默认 最新

  • dougong2005 2013-09-28 11:00
    已采纳

    Since lookahead assertion seems to be not supported, I'm providing you a different algorithm with no regexp:

    Perl code:

    sub insert_comma {
        my $x=shift;
        my $l=length($x);
        for (my $i=$l%3==0?3:$l%3;$i<$l;$i+=3) {
            substr($x,$i++,0)=',';
        }
        return $x;
    }
    print insert_comma(1000000000);
    

    Go code: Disclaimer: I have zero experience with Go, so bear with me if I have errors and feel free to edit my post!

    func insert_comma(input_num int) string {
        temp_str := strconv.Itoa(input_num)
        var result []string
        i := len(temp_str)%3;
        if i == 0 { i = 3 }
        for index,element := range strings.Split(temp_str, "") {
            if i == index {
                result = append(result, ",");
                i += 3;
            }
            result = append(result, element)
        }
        return strings.Join(result, "")
    }
    
    func main() {
        fmt.Println(insert_comma(1000000000))
    }
    

    http://play.golang.org/p/7pvo7-3G-s

    打赏 评论

相关推荐 更多相似问题