JavaScript拆分而不会丢失字符

Question

我想使用JavaScript拆分某些文本。文字如下：

9:30 pm
The user did action A.

10:30 pm
Welcome, user John Doe.

11:30 am
Messaged user John Doe

现在，我想将字符串拆分为事件。即：

9:30 pm
The user did action A.

将是一个事件。我正在使用RegEx：

var split = journals.split(/\d*\d:/);

事情是，前两个字符迷路了。分裂看起来像这样：

30 pm
    The user did action A.

如何分割以使分割保持前两个/三个字符（即 9：或 10：）等？

谢谢！

Answer 1

使用前瞻：

var split = journals.split(/(?=\b\d+:)/);

Answer 2

拆分换行符会不会更容易？

var split = journals.split(/\n\n/);

修改

尝试将字符串规范化为您可以使用的格式：

/*
 Non-normalized string
*/
var str = "9:30 pm\nThe user did action A.10:30 pm\nWelcome, user John Doe.\n\n\n11:30 am\nMessaged user John Doe\n12:30 pm\nThe user did something else.";

/*
 Normalizing into a specific format. TIMESTAMP\nDESCRIPTION\n\n.
 Then removing extraneous leading \n\n
*/

str = str.replace(/\n*([0-9]{1,2}:[0-9]{2} (a|p)m)\n*/g, "\n\n$1\n").replace(/^\n+/, "");

var events = str.split(/\n\n/);

/*
 The following should display an array of strings of the form:
 TIMESTAMP\nDESCRIPTION
*/
console.log(events); 

/*
 Loop through events and split on single newline to get timestamp and description
*/
for(var i = 0; i < events.length; i++) {
   var event = events[i];
   var eventData = event.split(/\n/);
   var time = eventData[0];
   var description = eventData[1];
   console.log(time, description);
}