Question

我尝试将文本拆分为几个较小的块，以便使用Javascript和RegEx解析它。我已经在这里展示了我最好的镜头，例如：

我有一套规则要遵循：我想接收块。每个块都以星号（*）作为第一个符号（如果没有缩进，否则是制表符）开头，后跟2-3个大写字母，逗号，（可能）空格和可能是A，R，T的代码，RS或RSS。其次是可选点。之后的Linebreak，文本来了。该文本结束了下一个星号的出现，遵循与上述相同的模式。

有人可以帮我弄清楚如何分开这个吗？到目前为止，这是我的模式：

[^\t](.{2,3}),\s?.{1,3}\.?\n.*

非常感谢！

Answer 1

您可以使用

^[ \t]*\*[A-Z]{2,3},\s*(?:[ART]|RSS?)\.?[\n\r](?:(?!^[ \t]*\*[A-Z]{2,3},\s*(?:[ART]|RSS?)\.?)[\s\S])+

见a demo on regex101.com。

<小时/> 分成几部分：

^[ \t]*\*[A-Z]{2,3}           # start of the line, spaces or tabs and 2-3 UPPERCASE letters
,\s*(?:[ART]|RSS?)\.?[\n\r]   # comma, space (optional), code, dot and newline
(?:                           # non-capturing group

    (?!^[ \t]*\*[A-Z]{2,3},\s*(?:[ART]|RSS?)\.?)   
                              # neg. lookahead with the same pattern as above
    [\s\S]                    # \s + \S = effectively matching every character
)+

该技术被称为驯化贪婪令牌。

Answer 2

既然您正在使用JavaScript，那么为什么不使用分割来实现分割，它可以分割捕获的字符串以及分离的部分？然后将标题绑定在一个看起来像

的数组中

[[heading1, block1], [heading2, block2], ...]

通过这种方式，您可以立即获得格式良好的数据来处理该行。只是一个想法！

＆＃13;

const s = `*GW, A
This is my very first line. The asterics defines a new block, followed by the initials (2-3 chars), a comma, a (possible) space and a code that could be A, R, T, RS or RSS. Followed by that is an optional dot. Linebreak afterwards, where the text comes.

	*JP, R.
	New block here, as the line (kind of) starts with an asterics. Indentations with 4 spaces or a tab means that it is a second level thing only, that does not need to be stripped away necessarily.

	But as you can see, a block can be devided into several
    lines, 

    even with multiple lines.

	*GML, T.
	And so we continue...

    Let's just make sure that a line can start with an
    *asterics, without breaking the whole thing.
	*GW, RS
	Yet another block here.

		*GW, RSS.
		And a very final one.

        Spread over several lines.

*TA, RS.
First level all of a sudden again.
*PA, RSX
    Just a line to check whether RSX is a separate block.

`;
  
const splits = s.split(/\*([A-Z]{2,3}),\s?([AT]|RS{0,2})(\.?)\n/).slice(1);

const grouped = [];

for (let i = 0; i < splits.length; i += 4) {
  const group = splits.slice(i, i+3);
  group[3] = splits[i+3].trim().split(/\s*[\r\n]+\s*/g);
  grouped.push(group);
}

console.log(grouped);

＆＃13;

Answer 3

希望这是你想要的。这很有效。

([\*\t])+(.{2,3}),\s?.[A,R,T,RS,RSS]{1,3}\.?\n.*

将文本拆分为块（Javascript，regex）

3 个答案: