JavaScript：如何获取紧接在另一个特定字符之后的某个特定字符的出现索引？

Question

Let's say I have this array of tweets:

var arr = ['@userone Hey man, whats popping', 'Shoutout to @usertwo haha']

How would I make get rid of the mentions and only contain the message? So like:

var newArr = ['Hey man, whats popping', 'Shoutout to haha']

Here's what I can come up with

if (tweet.includes('@')) {
  var atIndex = tweet.indexOf('@');
  var spaceIndex = // index of the nearest space after @
  var strToReplace = tweet.substring(atIndex, spaceIndex);
  tweet = tweet.replace(strToReplace, '');

}

Please help.

Answer 1

 var arr = ['@userone Hey man, whats popping', 'Shoutout to @usertwo haha' ]; var i = 0, at_pos, sp_pos, str_rep; while(i<arr.length) { at_pos = arr[i].indexOf('@'); sp_pos = arr[i].indexOf(' ', at_pos); str_rep = arr[i].substring(at_pos, sp_pos+1); arr[i] = arr[i].replace(str_rep, ''); console.log(arr[i]); i++; } 

OR simply you can use regular expressions like

 var arr = ['@userone Hey man, whats popping', 'Shoutout to @usertwo haha' ]; var i=0; while(i<arr.length){ arr[i] = arr[i].replace(/\\@[^\\s]*\\s/g, ''); console.log(arr[i]); i++; } 

Answer 2

arr.map(e => e.replace(/(?:^|\W)@(\w+)(?!\w)/g,"") )

一行完成:) ...演示在这里

Answer 3

Regex is your friend here.

   var arr = ['@userone Hey man, whats popping', 'Shoutout to @usertwo haha'];

    arr.forEach(function(element,index) {
        arr[index] = element.replace(/@[A-Za-z0-9]*\s/, "");
    }

    console.log(arr);

Answer 4

建立在@Abdennour ...

var newArr = arr.map(e => e.replace(/@\w+\s+/,"") );