正则表达式捕获某些标签后的文本块

Question

我有这样的HTML：

<h3>What to bring</h3>
<p><p>It's important to bring good walking shoes.  You never know when you will be out walking and there's a decent chance of rain.</p></p>
<h3>How to get there</h3>
It is reachable by many ways: it lies in the visually stunning nature park.
<h3>What not to forget</h3>
Walking shoes!

如何在Rails中将其拆分为描述和内容。描述基于h3标签。

我已经有一个正则表达式来提取标题：

description.scan(/<h3>(.*?)<\/h3>/).flatten

但是如何提取每个块的内容？所以基本上我正在寻找一个包含3个文本块的数组：

["<p><p>It's important to bring good walking shoes.  You never know when you will be out walking and there's a decent chance of rain.</p></p>","It is reachable by many ways: it lies in the visually stunning nature park.","Walking shoes!"]

文本块可以跨越多行。

Answer 1

你可以在这个正则表达式上split：

description.split(/<h3>.*?<\/h3>/)
# => [
 "\n<p><p>It's important to bring good walking shoes.  You never know when you will be out walking and there's a decent chance of rain.</p></p>\n",
 "\nIt is reachable by many ways: it lies in the visually stunning nature park.\n",
 "\nWalking shoes!\n"]

确保删除标签内的捕获组表单。

请参阅docs：

  

split(pattern=nil, [limit]) → an_array

     

将str分为基于分隔符的子串，返回这些子串的数组。

     

（...）

     

如果pattern是Regexp，则str在模式匹配的位置被划分。只要模式匹配零长度字符串，str就会分成单个字符。如果pattern包含组，则相应的匹配也将在数组中返回。