getting cookie ID using stringify in nodejs

I am using the following code to get the cookieID of a specific website:

    var request = require('request');
    var Cookie = require('request-cookies').Cookie;

    request.get('http://dmp.theadex.com/d/753/i/2.gif', function(err, response, body) {
      var rawcookies = response.request.headers['set-cookie'];
      //console.log(response.headers);
      for (var i in rawcookies) {
        var cookie = new Cookie(rawcookies[i]);
        //console.log(cookie.key, cookie.value);
      }
    }).on('redirect', function () {
      let a = this.response.headers['set-cookie'];
      //console.log(_.isArray(a));
      console.log('a = ', a);
      let cookieText = a[0];
      //console.log('cookieText', cookieText);
      let split = cookieText.split("'");
      console.log('split = ', split[0].split(";")[0]);

    });

The output is the following: a= [ 'axd=1001413541554540210; expires=Thu, 24-May-2018 13:54:54 GMT; Max-Age=31536000; path=/; domain=.theadex.com' ] split= axd=1001413541554540210

So the code is working as it should, but extracting the cookieID from the array (a) is not that efficient I guess. Does anyone have a better solution to get around this(maybe a module or a handy feature)? Thanks in advance.

via Abdulrazzak Tujjar