Question

我有以下文字：

@title1

Some stuff here and some @junk@ here

@newheader

Multiple lines. 
Multiple lines. 
Multiple lines. 

@title3

Extra stuff here.

我需要一个与标题后面的文字相匹配的正则表达式。第一场比赛应该返回

这里有些东西和@ junk @ here

此外，标题是以@开头的新行开头，后跟一些非空格字符

http://jsfiddle.net/QCNfQ/2/

Answer 1

小提琴：http://jsfiddle.net/u5Khe/

您正在寻找此RE：/(?:^|\n)@([^@\n]+)\s*((?:[\S\s](?!\n@))+)/g。

代码：

var string = "@title1\n\nTest @case@ one\n\n@title2\n\nMulti" +
             "\nline\nstring\n\n@title3\n\nfinal test";
var results = [];

var re = /(?:^|\n)@([^@\n]+)\s*((?:[\S\s](?!\n@))+)/g;
var matches = null;
while((matches = re.exec(string)) != null){
    /* matches[0] = whole block
       matches[1] = title
       matches[2] = body
     */
     var body = matches[2].replace(/\^s+|\s$/g,"");
     results.push(body);
}
//results.length will be 3;
alert(results.join("\n-----------------------\n"));
//Shows an alert with all matches, separated by "\n----------------\n"

RE的解释：

(?:^|\n)@寻找标题的开头（^@ =“@在文本的开头”，\n@ =“@在新行的开头”
([^@\n]+)表示：匹配除@或换行符之外的每个字符（标题的分隔符，由OP定义）
((?:[\S\s](?!\n@))+)表示：选择所有+个字符\S\s，后面没有换行符+ @ (?!\n@)。
/g是“global”flag =“尝试在给定字符串上获得尽可能多的匹配”

您的字符串应格式如下：

@title
Body

@title2
Anything, from @ to @, as long as the next line doesn't start with a @
 @ (There's a whitespace before this @)

@custom title@ Delimited by the @

@Foo
bar

Answer 2

你可能会做这样的事情：

/(@title\d)(\s)*(.*)/gi;

然后访问第三个（$3）组。

因此...

var a = "@title1\n\nSome stuff here and some @junk@";
var a1 = "@title2\n\nExtra stuff here.";

var b = /(@title\d)(\s)*(.*)/gi;
var c = a.replace(b, '$3');
var d = a1.replace(b, '$3');

document.write(c + '<br />' + d);

示例： http://jsfiddle.net/jasongennaro/5Chjf/

fyi ...这假设@title每隔一行开始。

Answer 3

试试这个：

var text = "@title1

Some stuff here and some @junk@

@title2

Extra stuff here."; 

var output = text.replace(/([^@]+@)(\w+@)/,
            function (all, g1, g2) {
                return [g2, g1].join('');
            }
    );

alert(output)

Answer 4

试试这个

'\n@title1   test'.match(/(?:\n@title\d)(?:[\s|\n])*(.*)/)[1]

正则表达式匹配一些文本

4 个答案: