正则表达式：字符串匹配，包括标点符号

Question

From another question，我有这个表达式来匹配句子中的单词：

var sentence = "Exclamation! Question? Full stop. Ellipsis...";
console.log(sentence.toLowerCase().match(/\w+(?:'\w+)*/g));

完美运行。但是，现在我正在寻找一种方法来分别匹配感叹号、问号和句号。结果应如下所示：

[
  "exclamation",
  "!",
  "question",
  "?",
  "full",
  "stop",
  ".",
  "ellipsis",
  "."
]

只匹配省略号中的一个点，而不是单独匹配所有三个点。

任何帮助将不胜感激！

Answer 1

使用单词边界只返回省略号中的一个点怎么样？

var sentence = "Exclamation! Question? Full stop. Ellipsis...";
console.log(sentence.toLowerCase().match(/[a-z]+(?:'[a-z]+)*|\b[!?.]/g));

或否定前瞻：

var sentence = "Exclamation! Question? Full stop. Ellipsis...";
console.log(sentence.toLowerCase().match(/[a-z]+(?:'[a-z]+)*|[!?.](?![!?.])/g));

在您评论的场景扩展之后，消极的后视似乎是有效的。

var sentence = "You're \"Pregnant\"??? How'd This Happen?! The vasectomy YOUR 1 job. Let's \"talk this out\"...";
console.log(sentence.toLowerCase().match(/[a-z\d]+(?:'[a-z\d]+)*|(?<![!?.])[!?.]/g));

Answer 2

试试下面的代码

var sentence = "Exclamation! Question? Full stop. Ellipsis...";
console.log(sentence.toLowerCase().match(/[?!.]|\w+/g));

如果你只想要一个点，你可以使用类似 ---

var sentence = "Exclamation!!! Question??? Full stop. Ellipsis...";

var arr = sentence.toLowerCase().match(/[?]+|[!]+|[.]+|\w+/g);
arr = arr.map(function(item){
	return item.replace(/(.)\1+/g, "$1");
})

console.log(arr);