Question

假设有一个包含以下内容的textarea文本：

On date at 3:16 PM, Sir Voldemort wrote:

> Sweet Harry!
> Let's see what's gonna happen.
>
>
> On date at 3:11 PM, wrote:
>
>> Awesome!
>>
>>
>> --
>> Random: string or sentence here, it doesn't matter
>> Another random line with e.g. a URL: http://www.jkrowling.com/
>>
>
>
>
> --
> **********************************************
>   ABCABCCAB
> **********************************************
>

Quote
“Efe iska?” 

--
Random2-1
Random2-2

**********************************************
  ABCABCABC
**********************************************

现在，如果出现一行只有两个短划线--（并且没有，前面有一个或多个>），则该行和以下两行应该被删除。

就像那样：

On date at 3:16 PM, Sir Voldemort wrote:

> Sweet Harry!
> Let's see what's gonna happen.
>
>
> On date at 3:11 PM, wrote:
>
>> Awesome!
>>
>>
>>
>
>
>
> **********************************************
>

Quote
“Efe iska?” 


**********************************************
  ABCABCABC
**********************************************

我已经开始使用以下代码来检测--的上一行以启动另一个substr，但是更确定一种更简单的正则表达式解决方案吗？

var msg = document.getElementById('msg'); // wrapped textarea around the text with ID msg
msg.value = msg.value.substr(0, msg.value.substr(0, msg.value.match('--\n').index).lastIndexOf('\n'))

Answer 1

这应该有用。

str.replace(/\n>*\s*--\n.*\n.*/g, '')

结果：

On date at 3:16 PM, Sir Voldemort wrote:

> Sweet Harry!
> Let's see what's gonna happen.
>
>
> On date at 3:11 PM, wrote:
>
>> Awesome!
>>
>>
>>
>
>
>
> **********************************************
>

Quote
“Efe iska?” 

**********************************************
  ABCABCABC
**********************************************

JavaScript regexp：删除带有字符串出现的行并跟随两行

1 个答案: