var tweet = "hello to @you and @him!";
var users = tweet.match(/@\w+/g);
console.log(users); // Will return an array containing ["@you", "@him"]

然后，您可以剥离@以仅获取名称:

Then, you can strip the @ to only get the names:

for (userIndex = 0; userIndex < users.length; userIndex++)
    users[userIndex] = users[userIndex].substr(1);

然后将其返回为

["you", "him"]