Async waterfall example nodejs

To avoid callback hell , a very useful tool for structuring calls in a sequence and make sure the steps pass the data to the next step.

var async = require('async');

        function(callback) {
            callback(null, 'Yes', 'it');
        function(arg1, arg2, callback) {
            var caption = arg1 +' and '+ arg2;
            callback(null, caption);
        function(caption, callback) {
            caption += ' works!';
            callback(null, caption);
    function (err, caption) {
        // Node.js and JavaScript Rock!

nJoy 😉

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