javascript - Return variable value from request.get inside one function to another NODEJS express -

i calling function request.gets json , fills in variables router.get

the variables value inside callfunc function undefined in router.get

how make them global can assign value inside request.get , use value in router.get

var title; var headline;  router.get('/test/code/:code', function(req, res, next){ var procedure = "execute procedurename 999, 'username', "+req.params.code callfunc(procedure)         res.render('display', {      title: title,           // <-- value here undefined     descritpion: headline,  // <-- value here undefined     var1: 'block sidebar',     var2: 'block content',     image: 'http://baidun.com/wp-content/uploads/2013/06/si_rm_1070bw-900x598.jpg',     url: 'https://www.youtube.com/watch?v=zb_vpdxahku'    }) })   function callfunc(procedure){ request.get('http://mywebservice.com/myservice.asmx/myservicedb?callback=&username=username&procedurename='+procedure, function(req, res, body){      var testvalue = body.slice(1, -2);     var result1 = json.parse(testvalue);     var result2 = json.parse(result1);     title = result2.jobselect[0].jobtitle;     headline = decodeuri(result2.jobselect[0].jobheadline);     console.log(title)     // <-- right value here     console.log(headline)  // <-- right value here }) } 

a way using res.render call back.

var title; var headline;  router.get('/test/code/:code', function(req, res, next){ var procedure = "execute procedurename 999, 'username', "+req.params.code callfunc(procedure, function(title, headline) {         res.render('display', {      title: title,                descritpion: headline,     var1: 'block sidebar',     var2: 'block content',     image: 'http://baidun.com/wp-content/uploads/2013/06/si_rm_1070bw-900x598.jpg',     url: 'https://www.youtube.com/watch?v=zb_vpdxahku'    }) }) })   function callfunc(procedure, cb){ request.get('http://mywebservice.com/myservice.asmx/myservicedb?callback=&username=username&procedurename='+procedure, function(req, res, body){      var testvalue = body.slice(1, -2);     var result1 = json.parse(testvalue);     var result2 = json.parse(result1);     title = result2.jobselect[0].jobtitle;     headline = decodeuri(result2.jobselect[0].jobheadline);     cb(title, headline); }) }