nodejs能否返回request模块数据，作为全局变

相关代码

var request = require('request');
var URL = require('url');
var iconv = require('iconv-lite');

var url = 'https://segmentfault.com/q/1010000010487842/';

request({
    encoding: null,
    url: url
}, function (error, response, body) {

    
    var array1 = /<title>(.*)<\/title>/gi.exec(body);
    if (array1 != null) {
          var title = array1[1];
        //console.log(title);
    }
  
    console.log(title);
    return title;//能否返回
    
});
//console.log(title);//title未定义，报错title is not defined

//需要外部调用

能否把title返回，作为全局变量使用。