JavaScript字符串使用多个定界符进行拆分，同时保留定界符

Question

I want to split a string in JavaScript using multiple delimiters while still keeping the delimiters. I tried it with this RegEx but I get matches I'm not interested in.

"id:123 name:test pumpe desc:pumpe p123".split(/(?=(id:))|(?=(name:))|(?=(desc:))/gi)

The Output I get:

["id:123 ", undefined, "name:", undefined, "name:test pumpe ", undefined, undefined, "desc:", "desc:pumpe p123"]

The Output I want:

["id:123", "name:test pumpe", "desc:pumpe p123"]

I tried plaing a bit with the regex but couldn't get my desired output.

Answer 1

The delimiters you actually want to split by are spaces, specifically, spaces that are followed by name: , id: or desc: .

Following this logic, this regex can be constructed:

/ (?=name:|id:|desc)/i

(Note the initial space)

Try it here: https://regex101.com/r/0RxEU9/1

 console.log("id:123 name:test pumpe desc:pumpe p123".split(/ (?=name:|id:|desc)/i)) 

Answer 2

您可以查找空格，而不要查找空格和冒号。

 console.log("id:123 name:test pumpe desc:pumpe p123".split(/\\s(?=\\S+?:)/)); 

Answer 3

If the key names are unknown you could do split at every \\s which is followed by \\w+:

( Regex demo )

 const splits = "id:123 name:test pumpe desc:pumpe p123".split(/\\s+(?=\\w+:)/) console.log(splits) 

Answer 4

您正在寻找遵循[name:]|[desc:]|[id:]模式的任何内容，因此简化了您的正则表达式：

 console.log("id:123 name:test pumpe desc:pumpe p123".split(/ (?=name:|id:|desc:)/i));