
EJEMPLO DE ORDENAMIENTO DE CALL BACKS EN NODE JS CON LA LIBRERIA ASYNC
var async = require('async');
async.waterfall([
function (cb){
artist.findEvents('Miley', cb);
},
function (concert, cb){
concert.findTickets({price: {$lt: 100}}, cb);
},
function (tickets, cb){
tickets.purchase({cc: 424242424242}, cb);
},
function (transaction, cb) {
email.confirm(customer, transaction, cb);
}
],
//FUNCTION RETORNO
function...