Javascript 正则表达式所有匹配项

Question

I'm trying to find a couple things in my source through regex, but I can't get it to returns all the data I need. The regex I use I've tested it on regex101 and works just fine I think.

My source:

/**
 * @author person1
 * @author person2
 */

console.log('a');

What I want is to retrieve person1 and person2.

My code:

fs.readdir('./src', function (err, files) {
        for (var i = 0; i < files.length; i++ ) {
            var file = files[i];

            fs.readFile('./src/' + file, { encoding: 'utf-8' }, function (err, data) {
                if (err)
                    throw err;

                var matches = (/@author (.*)$/gm).exec(data);
                console.log(matches);
            });
        }
    });

When ran this only returns person1 not person2. Is my regex wrong or what am I missing?

Answer 1

A RegExp object is stateful, and retains the index of the latest match, to continue from there. Thus, you may want to run the regex several times in a loop.

var match, authors = [];
var r = /@author (.*)$/gm;
while(match = r.exec(data)) {
        authors.push(match[1]);
}

You can also use data.match(...) , but this won't extract the match groups.

Answer 2

Now a days you can use String.prototype.matchAll

 const s = ` /** * @author person1 * @author person2 */ console.log('a'); `; const re = /@author\\s+(.*)$/gm; const people = [...s.matchAll(re)].map(m => m[1]); console.log(people);