从字符串中的第2行返回值

Question

我试图从包含字符串的字段返回第2行。我尝试过索引和拆分，它让我接近了，但是没有成功地使用换行符\n。

如何从下面的字符串返回“赋值组:TI技术监控”或理想的“TI-BSM-技术监控”。

Call-out:  true 
Assignment Group:  TI-BSM-Tech Monitoring 
Data String - index=cisco_ise sourcetype=cisco:ise:syslog source=* Alert when critical services are no longer logging Hourly

一些我尝试过的代码

var description = "Call-out:  true Assignment Group:  TI-BSM-Tech Monitoring next String - index=cisco_ise sourcetype=cisco:ise:syslog source=* Alert when critical services are no longer logging Hourly".split('Assignment Group:')[1];

var assignment = description.substring(description.indexOf('Group:  ') + 2);

console.log(assignment);

谢谢

Answer 1

这不是一个很好的答案，但不知道你还会怎么做。被Assignment Group:拆分，然后被"\n"分割。您必须使用双引号来捕获换行符。

​

let description = document.querySelector('textarea').value;

let assignment = description.split('Assignment Group:')[1].split("\n")[0].trim();

console.log(assignment);

<textarea rows="5" cols="50">
Call-out:  true 
Assignment Group:  TI-BSM-Tech Monitoring 
Data String - index=cisco_ise sourcetype=cisco:ise:syslog source=* Alert when critical services are no longer logging Hourly
</textarea>

​

Answer 2

这也可以用正则表达式来完成。

​

let description = document.querySelector('textarea').value;

// skip everything until Assignment Group, read everything that isn't a newline, discard everything else
// m is the multi-line flag

let assignment = description.replace(/^.*\nAssignment Group:\s+([^\n]+).*\n.*$/m,'$1');

document.getElementById("output").textContent = assignment;

<textarea rows="5" cols="50">
Call-out:  true 
Assignment Group:  TI-BSM-Tech Monitoring 
Data String - index=cisco_ise sourcetype=cisco:ise:syslog source=* Alert when critical services are no longer logging Hourly
</textarea>
<br>
<output id="output">
</output>

​