Regex: String match including punctuation

问题

From another question, I have this expression to match words in a sentence:

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

It works perfectly. However, now I am looking for a way to match exclamation marks, question marks, and full stops separately. The result should look like this:

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

Only matching one dot from the ellipsis, not all three dots separately.

Any help would be greatly appreciated!

回答1:

How about using a word boundary to only return one dot from the ellipsis?

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

Or a negative lookahead:

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

After your commented scenario extension, a negative lookbehind seems to be effective.

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));

回答2:

Try Below Code

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

In case You want only one dot, you could use something like ---

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);

来源：https://stackoverflow.com/questions/51576619/regex-string-match-including-punctuation

标签

javascript

regex

string

replace

match