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doSomething = function(cb) {
  exec(cmd, options, function(err, stdout, stderr) {
    if (err) {
      console.error(stdout);
      console.error(stderr);
      return cb(err);    
    } 
    
    // do some other stuff
    return cb;

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brew tap homebrew/science brew install opencv

brew install mplayer

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Sublime Text 2 – Useful Shortcuts (Mac OS X)

General

⌘T	go to file
⌘⌃P	go to project
⌘R	go to methods
⌃G	go to line
⌘KB	toggle side bar
⌘⇧P	command prompt

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AI.js: Robots with Brains!

Once upon a time, there was a roboticist. She spent eight years working with robots of various shapes, sizes, and intelligence levels - her specialty was in planning and navigation algorithms (useful for driverless cars, rescue robots, etc.). Eager for some fresh air away from the lab, she switched gears and started developing a better Internet with JavaScript and Node.js.

In her time away, however, her little robot friends have also learned JavaScript! The likes of Johnny-Five and NodeCopter have breathed new life into those traditionally Python/C++-controlled machines, and our favorite roboticist's little vacation has come to a close.

Whereas 2012 was the start of moving, reactive robots programmed in JavaScript, 2013 will be the year of the smarter, autonomous robot! Task driven and data oriented, they will be the most intelligent JS robots you've ever seen - and they'll be the founders of the robot.js of tomorrow.

In this talk, we will discuss and review examples of

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// the power of dom utilities and selector engines
// $('table.projects tr:even').addClass('even-row');

var slice = Array.prototype.slice,
    toArray = function (obj) {
      return Array.prototype.slice.call(obj, 0)
    }

var tables = toArray(document.querySelectorAll('table.projects'))

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var MAX_DESIRED = 10;

var randIndex = Math.floor(Math.random() * (MAX_DESIRED + 1));

// yields an integer between 0 and 10

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var moduleName = function () {
   ... // your module goes here
};

module.exports = moduleName;

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var mod = require('module-name')

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info:   Welcome to Nodejitsu
info:   It worked if it ends with Nodejitsu ok
info:   Executing command deploy
info:   Analyzing your application dependencies in app.js
warn:   No application exists for CrowdNotes
info:   Checking app availability CrowdNotes
error:  The subdomain you have requested is already in use.
help:   
help:   The subdomain is where your application will reside.
help:   Your application will then become accessible at: http://yourdomain.nodejitsu.com

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error:  Error running command deploy
error:  Nodejitsu Error (500): Internal Server Error
error:  
error:  There was an error while attempting to start your application.
error:  Error spawning drone
error:  Script prematurely exited
error:  
error:  This type of error is usually a user error.
error:  Error output from your application:
error: