async.seriesTo handle events one by one

/In async.series,all the functions are executed in series and the consolidated outputs of each function is passed to the final callback. e.g/

var async = require(‘async’); async.series([

function (callback) {
    console.log('First Execute..');
    callback(null, 'userPersonalData');
},
function (callback) {
    console.log('Second Execute.. ');
    callback(null, 'userDependentData');
}

], function (err, result) { console.log(result); });

//Output:

First Execute.. Second Execute.. [‘userPersonalData’,‘userDependentData’] //result